fzus61 kbuf 090203
glflo 
expires:202608090900;;856647

open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt sat aug 8 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a high pressure ridge averaging 30.0 inches exits 
eastward before a cold front sweeps eastward across lake ontario 
tonight. behind the front, a ridge averaging 30.1 inches builds from 
the western great lakes through sunday. this ridge begins to exit 
eastward sunday night and another cold front should sweep eastward 
across lake ontario monday night. behind the front, a trough 
averaging 29.8 inches should linger over the eastern great lakes 
through this thursday.


loz062-090900-
lake ontario open waters from the niagara river to hamlin beach-
1003 pm edt sat aug 8 2026

.overnight...southwest winds 5 to 10 knots becoming
northwest and increasing to 15 to 25 knots. a
chance of showers and thunderstorms. waves around 1 foot. 
.sunday...northwest winds 15 to 20 knots becoming southwest and
diminishing to 5 to 10 knots. waves 2 feet or less. 
.sunday night...south winds 5 to 10 knots. waves 1 foot or less. 
.monday...southwest winds 5 to 15 knots becoming west. showers
likely. waves 2 feet or less. 
.monday night...west winds 5 to 15 knots. a chance of showers.
waves 1 to 2 feet. 
.tuesday...west winds 10 knots or less becoming northwest. a
chance of showers and thunderstorms. waves 1 foot or less. 
.wednesday...northwest winds 10 knots or less becoming west. a
chance of showers wednesday night. waves 1 foot or less. 
.thursday...west winds 5 to 15 knots becoming northwest. a chance
of showers during the day. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 090203
glflo 
expires:202608090900;;856648

open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt sat aug 8 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a high pressure ridge averaging 30.0 inches exits 
eastward before a cold front sweeps eastward across lake ontario 
tonight. behind the front, a ridge averaging 30.1 inches builds from 
the western great lakes through sunday. this ridge begins to exit 
eastward sunday night and another cold front should sweep eastward 
across lake ontario monday night. behind the front, a trough 
averaging 29.8 inches should linger over the eastern great lakes 
through this thursday.


loz063>065-090900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 pm edt sat aug 8 2026

.overnight...southwest winds 10 to 15 knots becoming west
15 to 20 knots. a chance of showers and thunderstorms.
waves 2 feet or less. 
.sunday...west winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday night...west winds 5 to 15 knots becoming south. waves
2 feet or less. 
.monday...south winds 10 to 15 knots becoming west. showers
likely in the morning, then showers likely with a chance of
thunderstorms in the afternoon. waves 2 feet or less. 
.monday night...west winds 10 to 15 knots. showers likely in the
evening, then a chance of showers overnight. waves 1 to 2 feet. 
.tuesday...west winds 5 to 10 knots becoming northwest. waves
2 feet or less. 
.wednesday...west winds 5 to 10 knots becoming southwest. a
chance of showers wednesday night. waves 1 foot or less. 
.thursday...west winds 5 to 15 knots becoming northwest. a chance
of showers. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 090122
glfle 
expires:202608090815;;855962

open lake forecast for lake erie
national weather service cleveland oh
922 pm edt sat aug 8 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a cold front glides east across lake erie tonight. a ridge 
averaging 30.00 inches will build over the region for sunday. a 
series of weak low pressure systems 29.90 inches will move through
the region sunday night through tuesday. high pressure 30.00 
inches will build into the region for wednesday.


lez165>167-090815-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-
922 pm edt sat aug 8 2026

.rest of tonight...west winds 5 to 15 knots becoming north. waves
1 to 3 feet. 
.sunday...north winds 10 knots or less becoming west. waves
2 feet or less. 
.sunday night...south winds 5 to 15 knots becoming southwest
15 to 20 knots. a chance of showers and thunderstorms. waves 1 to
3 feet. 
.monday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. showers likely with a chance of thunderstorms in the
morning, then a chance of showers and thunderstorms in the
afternoon. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.monday night...southwest winds around 10 knots. showers likely
with a chance of thunderstorms. waves 1 to 3 feet. 
.tuesday...southwest winds 5 to 15 knots becoming west. a chance
of showers and thunderstorms. waves 1 to 2 feet. 
.wednesday...northwest winds 5 to 10 knots becoming southwest. a
chance of showers. waves 1 foot or less. 
.thursday...west winds around 10 knots becoming north. waves 1 to
2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 090122
glfle 
expires:202608090815;;855963

open lake forecast for lake erie
national weather service cleveland oh
922 pm edt sat aug 8 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a cold front glides east across lake erie tonight. a ridge 
averaging 30.00 inches will build over the region for sunday. a 
series of weak low pressure systems 29.90 inches will move through
the region sunday night through tuesday. high pressure 30.00 
inches will build into the region for wednesday.


lez061-168-169-090815-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
922 pm edt sat aug 8 2026

.rest of tonight...southwest winds 5 to 15 knots becoming north.
a chance of showers with a slight chance of thunderstorms late
this evening, then a slight chance of showers and thunderstorms
after midnight. waves 1 to 3 feet. 
.sunday...north winds less than 10 knots. waves 2 feet or less. 
.sunday night...light and variable winds becoming southwest 10 to
15 knots. a chance of showers and thunderstorms overnight. waves
1 foot or less building to 1 to 3 feet. 
.monday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. showers likely with a chance of thunderstorms in the
morning, then a chance of showers and thunderstorms in the
afternoon. waves 2 to 4 feet building to 3 to 5 feet. 
.monday night...west winds 5 to 15 knots. showers likely with a
chance of thunderstorms. waves 2 to 4 feet subsiding to 1 to
2 feet. 
.tuesday...west winds 10 knots or less becoming northwest. a
chance of showers and thunderstorms during the day, then a chance
of showers tuesday night. waves 1 to 2 feet. 
.wednesday...north winds 10 knots or less becoming southwest. a
chance of showers wednesday night. waves 1 foot or less. 
.thursday...southwest winds 5 to 10 knots becoming north. a
chance of showers during the day. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 090122
glfle 
expires:202608090815;;855961

open lake forecast for lake erie
national weather service cleveland oh
922 pm edt sat aug 8 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a cold front glides east across lake erie tonight. a ridge 
averaging 30.00 inches will build over the region for sunday. a 
series of weak low pressure systems 29.90 inches will move through
the region sunday night through tuesday. high pressure 30.00 
inches will build into the region for wednesday.


lez162>164-090815-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
922 pm edt sat aug 8 2026

.rest of tonight...west winds 5 to 15 knots becoming northwest.
waves 1 to 2 feet. 
.sunday...north winds 10 knots or less becoming south. waves
1 foot or less. 
.sunday night...south winds 5 to 15 knots becoming southwest
15 to 20 knots. a chance of showers and thunderstorms in the
evening, then showers and thunderstorms likely overnight. waves
1 to 3 feet. 
.monday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. showers likely with a chance of thunderstorms in the
morning, then a chance of showers and thunderstorms in the
afternoon. waves 1 to 3 feet. 
.monday night...southwest winds 5 to 10 knots. showers with
thunderstorms likely. waves 1 to 2 feet. 
.tuesday...southwest winds 5 to 10 knots becoming west. a chance
of showers and thunderstorms during the day, then showers likely
with a chance of thunderstorms tuesday night. waves 2 feet or
less. 
.wednesday...northwest winds 5 to 10 knots becoming west. a
chance of showers and thunderstorms during the day, then a chance
of showers wednesday night. waves 1 foot or less. 
.thursday...west winds 5 to 10 knots becoming north. waves 2 feet
or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 090647
glflh 
expires:202608091500;;868625

open lake forecast for lake huron
national weather service detroit/pontiac mi
247 am edt sun aug 9 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure around 30.00 inches slides east through
the ohio valley tonight through sunday, allowing winds to become
southerly once again for sunday. sunday evening through early
next week an active pattern with a stalled frontal boundary
draped over the southern great lakes region brings back chances
for organized thunderstorms to the region. by the end of next
week, high pressure around 30.1 inches builds south from central
canada.


lhz462>464-091500-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
247 am edt sun aug 9 2026

.today...light and variable winds becoming southwest 5 to
10 knots in the late morning and early afternoon...then backing
to the south late in the afternoon. waves 2 feet or less. 
.tonight...south winds 5 to 10 knots increasing to 10 to 15 knots
by midnight...then becoming southwest 5 to 10 knots early in the
morning. a chance of showers after midnight. waves 1 to 3 feet. 
.monday...west winds 5 to 10 knots veering to the northwest early
in the afternoon. a chance of showers in the morning. waves
2 feet or less. 
.monday night...light and variable winds. waves 2 feet or less. 
.tuesday...light and variable winds in the morning becoming east
5 to 10 knots...then backing to the northeast late in the
afternoon becoming light and variable. a chance of showers. waves
2 feet or less. 
.wednesday...north winds 5 to 10 knots backing to the west in the
late morning and early afternoon...then veering to the north .
waves 2 feet or less. 
.thursday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots early in the evening...then becoming northwest 5 to
10 knots by midnight. waves 2 feet or less building to 2 to
4 feet by midnight. 


$$

fzus63 kdtx 090647
glfsc 
expires:202608091500;;868627

lake st clair forecast
national weather service detroit/pontiac mi
247 am edt sun aug 9 2026

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure around 30.00 inches slides east through
the ohio valley tonight through sunday, allowing winds to become
southerly once again for sunday. sunday evening through early
next week an active pattern with a stalled frontal boundary
draped over the southern great lakes region brings back chances
for organized thunderstorms to the region. by the end of next
week, high pressure around 30.1 inches builds south from central
canada.


lcz460-091500-
lake st clair-
247 am edt sun aug 9 2026

.today...north winds 5 to 10 knots early in the morning becoming
light and variable...then becoming south 5 to 10 knots early in the
afternoon increasing to 10 to 15 knots. mostly sunny. waves 2 feet
or less.
.tonight...southwest winds 10 to 15 knots. partly cloudy early in
the evening. a chance of showers late in the evening. showers and a
chance of thunderstorms after midnight. waves 2 feet or less.
.monday...west winds 10 to 15 knots diminishing to 5 to 10 knots
early in the afternoon. mostly cloudy until late afternoon then
clearing. a chance of showers early in the morning. waves 2 feet or
less.
.monday night...west winds 5 to 10 knots backing to the south after
midnight. partly cloudy. a chance of light showers after midnight.
waves 2 feet or less.
.tuesday...southwest winds 5 to 10 knots backing to the northeast in
the evening. partly sunny with a chance of light showers in the
morning...then partly cloudy with a chance of showers and
thunderstorms in the afternoon and evening. waves 2 feet or less.
.wednesday...northwest winds 5 to 10 knots. partly cloudy. a chance
of showers and thunderstorms. waves 2 feet or less.
.thursday...northeast winds 10 to 15 knots. partly cloudy. waves 2
feet or less.

$$

fzus63 kdtx 090647
glflh 
expires:202608091500;;868623

open lake forecast for lake huron
national weather service detroit/pontiac mi
247 am edt sun aug 9 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure around 30.00 inches slides east through
the ohio valley tonight through sunday, allowing winds to become
southerly once again for sunday. sunday evening through early
next week an active pattern with a stalled frontal boundary
draped over the southern great lakes region brings back chances
for organized thunderstorms to the region. by the end of next
week, high pressure around 30.1 inches builds south from central
canada.


lhz361-091500-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
247 am edt sun aug 9 2026

.today...southwest winds 5 to 10 knots backing to the northeast
late in the afternoon. waves 2 feet or less. 
.tonight...light and variable winds. a chance of showers after
midnight. waves 2 feet or less. 
.monday...northwest winds 5 to 10 knots. waves 2 feet or less. 
.monday night...west winds 5 to 10 knots  becoming light and
variable. waves 2 feet or less. 
.tuesday...light and variable winds. waves 2 feet or less. 
.wednesday...light and variable winds becoming northwest 5 to
10 knots . waves 2 feet or less. 
.thursday...northwest winds 10 to 15 knots becoming west 15 to
20 knots early in the evening...then becoming northwest 10 to
15 knots by midnight. waves 1 to 3 feet building to 3 to 5 feet .


$$

fzus63 kdtx 090647
glflh 
expires:202608091500;;868624

open lake forecast for lake huron
national weather service detroit/pontiac mi
247 am edt sun aug 9 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure around 30.00 inches slides east through
the ohio valley tonight through sunday, allowing winds to become
southerly once again for sunday. sunday evening through early
next week an active pattern with a stalled frontal boundary
draped over the southern great lakes region brings back chances
for organized thunderstorms to the region. by the end of next
week, high pressure around 30.1 inches builds south from central
canada.


lhz362-363-091500-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
247 am edt sun aug 9 2026

.today...southwest winds 5 to 10 knots becoming south 10 to
15 knots in the afternoon. waves 1 to 3 feet building to 2 to
4 feet late in the afternoon. 
.tonight...southeast winds 10 to 15 knots becoming south 5 to
10 knots by midnight...then veering to the southwest early in the
morning. a chance of showers. waves 2 to 4 feet subsiding to 1 to
3 feet after midnight. 
.monday...west winds 5 to 10 knots. a chance of showers in the
morning. waves 2 feet or less. 
.monday night...north winds 5 to 10 knots early in the evening
becoming light and variable. waves 2 feet or less. 
.tuesday...light and variable winds. waves 2 feet or less. 
.wednesday...light and variable winds becoming north 5 to
10 knots early in the evening...then backing to the northwest by
midnight. waves 2 feet or less. 
.thursday...northwest winds 10 to 15 knots. waves 1 to 3 feet
building to 3 to 5 feet . 


$$

fzus63 kmkx 090202
glflm 
expires:202608090945;;856539

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
902 pm cdt sat aug 8 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

winds will become southerly by this evening as a low pressure
trough around 29.8 inches approaches from the minnesota arrowhead.
an unsettled weather pattern will set up over the upper great 
lakes all week where weak waves of low pressure will cross the 
region and produce rounds of thunderstorms at times. the first
round of weakening storms should arrive in southern lake michigan
late sunday morning, and additional storms are possible there
sunday night.


lmz261-362-364-366-563-565-567-868-090945-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
902 pm cdt sat aug 8 2026

sheboygan wi to pentwater mi north...

.rest of tonight...southwest winds 10 to 15 kt increasing to
10 to 20 kt. waves 1 to 3 ft. 
.sunday...southwest winds 10 to 20 kt becoming south 15 to 25 kt.
chance of showers in the afternoon. waves 1 to 3 ft building to
2 to 4 ft. 
.sunday night...southwest winds 10 to 20 kt diminishing to 10 to
15 kt late in the evening, then becoming west 5 to 10 kt after
midnight becoming northwest late. patchy fog overnight. waves
2 to 4 ft subsiding to 1 to 3 ft. 
.monday...north winds 5 to 10 kt becoming northwest 10 to 15 kt.
patchy dense fog in the morning. waves 1 to 2 ft. 
.monday night...southeast winds 10 to 15 kt becoming northeast.
waves 1 ft or less. 
.tuesday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
chance of showers in the morning. waves 1 ft or less.
.tuesday night...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. waves nearly calm. 
.wednesday...west winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 ft or less. 
.thursday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft.  

$$

fzus63 kmkx 090202
glflm 
expires:202608090945;;856540

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
902 pm cdt sat aug 8 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

winds will become southerly by this evening as a low pressure
trough around 29.8 inches approaches from the minnesota arrowhead.
an unsettled weather pattern will set up over the upper great 
lakes all week where weak waves of low pressure will cross the 
region and produce rounds of thunderstorms at times. the first
round of weakening storms should arrive in southern lake michigan
late sunday morning, and additional storms are possible there
sunday night.


lmz080-669-671-673-675-777-779-870-872-874-876-878-090945-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from port washington to north point light wi 5 nm
offshore to mid lake-
lake michigan from north point light to wind point wi 5 nm
offshore to mid lake-
lake michigan from wind point wi to winthrop harbor il 5 nm
offshore to mid lake-
lake michigan from winthrop harbor to wilmette harbor il 5 nm
offshore to mid lake-
lake michigan from wilmette harbor il to michigan city in 5 nm
offshore to mid lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
lake michigan from holland to grand haven mi 5 nm offshore to mid
lake-
lake michigan from south haven to holland mi 5 nm offshore to mid
lake-
lake michigan from st. joseph to south haven mi 5 nm offshore to
mid lake-
902 pm cdt sat aug 8 2026

sheboygan wi to pentwater mi south...

.rest of tonight...south winds 10 to 15 kt. waves 1 to 2 ft.
.sunday...south winds 10 to 20 kt. chance of showers and slight
chance of thunderstorms in the morning, then chance of showers
and thunderstorms in the afternoon. waves 1 to 3 ft building to
2 to 4 ft. 
.sunday night...south winds 10 to 20 kt becoming southwest.
chance of showers and thunderstorms in the evening, then chance
of showers overnight. patchy fog overnight. waves 2 to 4 ft. 
.monday...northwest winds 10 to 20 kt becoming north 10 to 15 kt.
chance of showers in the morning, then chance of showers and
thunderstorms in the afternoon. waves 1 to 3 ft. 
.monday night...northeast winds 5 to 10 kt. chance of showers and
thunderstorms in the evening, then chance of showers overnight.
waves 1 ft or less. 
.tuesday...east winds 5 to 10 kt becoming northeast 10 to 15 kt.
chance of showers and thunderstorms in the morning, then chance
of showers in the afternoon. waves 1 ft or less. 
.tuesday night...northeast winds 5 to 10 kt. chance of showers.
waves 1 ft or less. 
.wednesday...southeast winds 10 to 15 kt becoming south. waves
1 ft or less. 
.thursday...north winds 10 to 20 kt. waves 1 to 3 ft.  

$$

fzus63 kmqt 090201
glfls 
expires:202608090800;;856506

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat aug 8 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

upper michigan is situated between a 29.6 inch hudson bay low and a 
30.0 inch high centered over the ohio river valley. this will drive 
weak and ill-defined 29.9 inch ridging/troughing over lake superior 
through monday night as the high moves southeast. weak ridging of 
30.0 inches extending between a 30.2 inch bermuda high and 30.0 inch 
ridging over western canada returns for tuesday before decreasing to 
29.9 inches tuesday night. a 29.8 inch trough moves over the lake 
wednesday before ridging of 30.0 inches returns on thursday from the 
canadian prairie.




lsz266-090800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
1001 pm edt sat aug 8 2026

.rest of tonight...southwest winds 10 to 20 knots backing south
after midnight, then veering southwest late. a chance of showers.
a slight chance of thunderstorms after midnight. waves 1 to
3 feet subsiding to calm to 2 feet. 
.sunday...west winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon, then veering northeast late. a chance of
showers and a slight chance of thunderstorms. waves calm to
2 feet. 
.sunday night...east winds 5 to 15 knots backing northwest after
midnight, then backing west late. a slight chance of showers
through midnight. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots veering west by mid
afternoon. waves calm to 2 feet. 
.monday night...west winds 5 to 15 knots backing southwest after
midnight. waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...southwest winds 5 to 15 knots. waves calm to
2 feet. 
.wednesday...west winds 5 to 15 knots becoming northwest 10 to
20 knots. waves calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 090201
glfls 
expires:202608090800;;856507

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat aug 8 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

upper michigan is situated between a 29.6 inch hudson bay low and a 
30.0 inch high centered over the ohio river valley. this will drive 
weak and ill-defined 29.9 inch ridging/troughing over lake superior 
through monday night as the high moves southeast. weak ridging of 
30.0 inches extending between a 30.2 inch bermuda high and 30.0 inch 
ridging over western canada returns for tuesday before decreasing to 
29.9 inches tuesday night. a 29.8 inch trough moves over the lake 
wednesday before ridging of 30.0 inches returns on thursday from the 
canadian prairie.




lsz267-090800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt sat aug 8 2026

.rest of tonight...southwest winds 5 to 15 knots backing south
after midnight, then becoming southwest 10 to 20 knots late. a
slight chance of showers after midnight. waves calm to 2 feet. 
.sunday...southwest winds 10 to 20 knots backing southeast in the
afternoon, then becoming northeast 5 to 15 knots late. a chance
of showers and a slight chance of thunderstorms. waves calm to
2 feet. 
.sunday night...northeast winds 5 to 15 knots backing northwest
after midnight. a slight chance of showers through midnight.
waves calm to 2 feet. 
.monday...west winds 5 to 15 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.monday night...northwest winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.tuesday night...northwest winds 5 to 15 knots backing west after
midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots becoming northwest 10 to
20 knots. waves calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 090201
glfls 
expires:202608090800;;856502

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat aug 8 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

upper michigan is situated between a 29.6 inch hudson bay low and a 
30.0 inch high centered over the ohio river valley. this will drive 
weak and ill-defined 29.9 inch ridging/troughing over lake superior 
through monday night as the high moves southeast. weak ridging of 
30.0 inches extending between a 30.2 inch bermuda high and 30.0 inch 
ridging over western canada returns for tuesday before decreasing to 
29.9 inches tuesday night. a 29.8 inch trough moves over the lake 
wednesday before ridging of 30.0 inches returns on thursday from the 
canadian prairie.




lsz162-090800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt sat aug 8 2026 /901 pm cdt sat aug 8 2026/

.rest of tonight...southwest winds 5 to 15 knots veering
northwest late. a chance of showers and a slight chance of
thunderstorms. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots backing south in the
afternoon. a slight chance of showers through early afternoon.
waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.monday night...west winds 5 to 15 knots veering north after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet. 
.tuesday...north winds 5 to 15 knots veering south by mid
afternoon. waves calm to 2 feet. 
.tuesday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 090201
glfls 
expires:202608090800;;856504

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat aug 8 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

upper michigan is situated between a 29.6 inch hudson bay low and a 
30.0 inch high centered over the ohio river valley. this will drive 
weak and ill-defined 29.9 inch ridging/troughing over lake superior 
through monday night as the high moves southeast. weak ridging of 
30.0 inches extending between a 30.2 inch bermuda high and 30.0 inch 
ridging over western canada returns for tuesday before decreasing to 
29.9 inches tuesday night. a 29.8 inch trough moves over the lake 
wednesday before ridging of 30.0 inches returns on thursday from the 
canadian prairie.




lsz264-090800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt sat aug 8 2026

.rest of tonight...southwest winds 5 to 15 knots veering west
late. a chance of showers. waves 1 to 3 feet subsiding to calm to
2 feet. 
.sunday...west winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming south 5 to 15 knots
late. a chance of showers through early afternoon. waves calm to
2 feet. 
.sunday night...south winds less than 10 knots veering southwest
after midnight. waves calm to 2 feet. 
.monday...west winds less than 10 knots becoming southwest 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots becoming west less
than 10 knots after midnight. waves calm to 2 feet. 
.tuesday...west winds less than 10 knots becoming southwest 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.tuesday night...southwest winds less than 10 knots veering west
after midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots backing west. waves
calm to 2 feet. 

$$

fzus63 kmqt 090201
glfls 
expires:202608090800;;856503

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat aug 8 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

upper michigan is situated between a 29.6 inch hudson bay low and a 
30.0 inch high centered over the ohio river valley. this will drive 
weak and ill-defined 29.9 inch ridging/troughing over lake superior 
through monday night as the high moves southeast. weak ridging of 
30.0 inches extending between a 30.2 inch bermuda high and 30.0 inch 
ridging over western canada returns for tuesday before decreasing to 
29.9 inches tuesday night. a 29.8 inch trough moves over the lake 
wednesday before ridging of 30.0 inches returns on thursday from the 
canadian prairie.




lsz263-090800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
1001 pm edt sat aug 8 2026

.rest of tonight...southwest winds 5 to 15 knots veering west
after midnight. a chance of showers. a slight chance of
thunderstorms after midnight. waves 1 to 3 feet subsiding to calm
to 2 feet. 
.sunday...west winds 5 to 15 knots veering north in the
afternoon, then backing southwest late. a slight chance of
showers through early afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots diminishing to less
than 10 knots after midnight, then veering west late. waves calm
to 2 feet. 
.monday...west winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.tuesday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.tuesday night...southwest winds 5 to 15 knots becoming west less
than 10 knots after midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.thursday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 090201
glfls 
expires:202608090800;;856505

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat aug 8 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

upper michigan is situated between a 29.6 inch hudson bay low and a 
30.0 inch high centered over the ohio river valley. this will drive 
weak and ill-defined 29.9 inch ridging/troughing over lake superior 
through monday night as the high moves southeast. weak ridging of 
30.0 inches extending between a 30.2 inch bermuda high and 30.0 inch 
ridging over western canada returns for tuesday before decreasing to 
29.9 inches tuesday night. a 29.8 inch trough moves over the lake 
wednesday before ridging of 30.0 inches returns on thursday from the 
canadian prairie.




lsz265-090800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt sat aug 8 2026

.rest of tonight...south winds 10 to 20 knots veering west late.
a chance of showers. a slight chance of thunderstorms after
midnight. waves calm to 2 feet. 
.sunday...southwest winds 10 to 20 knots becoming east 5 to
15 knots in the afternoon, then backing northeast late. a chance
of showers. waves calm to 2 feet. 
.sunday night...southeast winds 5 to 15 knots veering southwest
after midnight, then veering west late. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots veering west by mid
afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.tuesday night...south winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.wednesday...west winds 10 to 20 knots veering northwest. waves
calm to 2 feet. 
.thursday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 

$$