fzus63 kdtx 131945
glflh 
expires:202608140345;;133900

open lake forecast for lake huron
national weather service detroit/pontiac mi
345 pm edt thu aug 13 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...a quasi-stationary front holds south of the great
lakes today with the next batch of storms likely holding south of
lake erie this evening. high pressure, 30.00 inches, will
dominate the region to the north of the front through saturday.
light winds will be variable over the next 2 days, but maintain
an overall northerly trend over lake huron and southerly toward
western lake erie.


lhz361-140345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
345 pm edt thu aug 13 2026

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


$$

fzus63 kdtx 131945
glflh 
expires:202608140345;;133901

open lake forecast for lake huron
national weather service detroit/pontiac mi
345 pm edt thu aug 13 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...a quasi-stationary front holds south of the great
lakes today with the next batch of storms likely holding south of
lake erie this evening. high pressure, 30.00 inches, will
dominate the region to the north of the front through saturday.
light winds will be variable over the next 2 days, but maintain
an overall northerly trend over lake huron and southerly toward
western lake erie.


lhz362-363-140345-
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-
345 pm edt thu aug 13 2026

.tonight...light and variable winds becoming northwest 5 to
10 knots early in the morning. waves 2 feet or less. 
.friday...north winds 5 to 10 knots. waves 2 feet or less. 
.friday night...light and variable winds becoming northeast 5 to
10 knots after midnight. waves 2 feet or less. 
.saturday...east winds 5 to 10 knots. waves 2 feet or less. 
.saturday night...southeast winds 5 to 10 knots increasing to
10 to 15 knots in the late evening and overnight. a chance of
showers. waves 1 to 3 feet. 
.sunday...southeast winds 5 to 10 knots veering to the northwest
late in the afternoon...then increasing to 10 to 15 knots late in
the evening. a chance of showers in the morning. waves 1 to
3 feet building to 2 to 4 feet late in the afternoon. 
.monday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and early afternoon...then becoming
light and variable . waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday...light and variable winds becoming southwest 5 to
10 knots in the late morning and early afternoon...then becoming
south 10 to 15 knots . a chance of. waves 2 feet or less. 


$$

fzus63 kdtx 131945
glflh 
expires:202608140345;;133902

open lake forecast for lake huron
national weather service detroit/pontiac mi
345 pm edt thu aug 13 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...a quasi-stationary front holds south of the great
lakes today with the next batch of storms likely holding south of
lake erie this evening. high pressure, 30.00 inches, will
dominate the region to the north of the front through saturday.
light winds will be variable over the next 2 days, but maintain
an overall northerly trend over lake huron and southerly toward
western lake erie.


lhz462>464-140345-
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-
345 pm edt thu aug 13 2026

.tonight...light and variable winds. waves 2 feet or less. 
.friday...light and variable winds becoming north 5 to 10 knots
in the late morning and afternoon. waves 2 feet or less. 
.friday night...north winds 5 to 10 knots veering to the
northeast after midnight. waves 1 to 3 feet. 
.saturday...east winds 5 to 10 knots. waves 2 feet or less. 
.saturday night...southeast winds 5 to 10 knots increasing to
10 to 15 knots in the late evening and overnight. a chance of
showers in the evening...then showers likely after midnight.
waves 1 to 3 feet. 
.sunday...southeast winds 10 to 15 knots becoming northwest 5 to
10 knots. a chance of showers. waves 1 to 3 feet building to 2 to
4 feet late in the evening. 
.monday...north winds 10 to 15 knots becoming light and variable.
waves 2 to 4 feet subsiding to 1 to 3 feet . 
.tuesday...light and variable winds becoming southwest 5 to
10 knots in the late morning and early afternoon...then backing
to the south . a chance of. waves 2 feet or less. 


$$

fzus63 kmkx 131950
glflm 
expires:202608140315;;133952

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
250 pm cdt thu aug 13 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...

multiple rounds of storms are expected to cross the southern
portion of lake michigan into this weekend due to a front that
remains in place south of the lake. low pressure of 29.7 inches
over kansas will track to the northeast and east toward southern
lake michigan into friday night and saturday. this low should help
to bump up winds and waves across the southern two thirds of lake
michigan into saturday. beyond this system, a broad ridge of high
pressure of 30.1 inches will push into the great lakes early next
week before another potential front moves through the region.


lmz366-565-567-669-868-870-140315-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
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 sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
250 pm cdt thu aug 13 2026

sturgeon bay wi to point betsie mi south to port washington wi to
whitehall mi...

.tonight...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.friday...northeast winds 10 to 15 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.friday night...northeast winds 10 to 20 kt veering to southeast.
chance of showers overnight. waves 3 to 5 ft. 
.saturday...southeast winds to 30 kt. chance of showers in the
morning, then showers likely in the afternoon. waves 4 to 7 ft
occasionally to 9 ft. 
.saturday night...south winds 10 to 20 kt becoming southwest.
showers likely in the evening, then chance of showers overnight.
waves 3 to 5 ft subsiding to 2 to 4 ft. 
.sunday...northwest winds 10 to 20 kt becoming north. waves 2 to
4 ft. 
.sunday night...north winds 10 to 20 kt. waves 1 to 3 ft. 
.monday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.tuesday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft.  

$$

fzus63 kmkx 131950
glflm 
expires:202608140315;;133953

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
250 pm cdt thu aug 13 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...

multiple rounds of storms are expected to cross the southern
portion of lake michigan into this weekend due to a front that
remains in place south of the lake. low pressure of 29.7 inches
over kansas will track to the northeast and east toward southern
lake michigan into friday night and saturday. this low should help
to bump up winds and waves across the southern two thirds of lake
michigan into saturday. beyond this system, a broad ridge of high
pressure of 30.1 inches will push into the great lakes early next
week before another potential front moves through the region.


lmz080-671-673-675-777-779-872-874-876-878-140315-
lake michigan from michigan city in to st. joseph mi 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 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-
250 pm cdt thu aug 13 2026

port washington wi to whitehall mi south...

.tonight...northeast winds 10 to 15 kt becoming east. chance of
rain. waves 1 to 2 ft. 
.friday...east winds 10 to 15 kt becoming northeast 10 to 20 kt.
slight chance of rain in the morning. waves 1 to 3 ft. 
.friday night...northeast winds 10 to 20 kt veering to southeast.
chance of showers overnight. waves 3 to 5 ft. 
.saturday...southeast winds 15 to 25 kt. showers in the morning,
then showers likely with a chance of thunderstorms in the
afternoon. waves 4 to 6 ft occasionally to 8 ft. 
.saturday night...south winds 10 to 20 kt becoming southwest.
showers likely with a chance of thunderstorms in the evening,
then chance of showers overnight. waves 2 to 4 ft. 
.sunday...west winds 10 to 20 kt becoming northwest. waves 2 to
4 ft. 
.sunday night...north winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 2 ft building to 2 to 4 ft. 
.monday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 2 to 4 ft. 
.tuesday...southwest winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmkx 131950
glflm 
expires:202608140315;;133951

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
250 pm cdt thu aug 13 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...

multiple rounds of storms are expected to cross the southern
portion of lake michigan into this weekend due to a front that
remains in place south of the lake. low pressure of 29.7 inches
over kansas will track to the northeast and east toward southern
lake michigan into friday night and saturday. this low should help
to bump up winds and waves across the southern two thirds of lake
michigan into saturday. beyond this system, a broad ridge of high
pressure of 30.1 inches will push into the great lakes early next
week before another potential front moves through the region.


lmz261-362-364-563-140315-
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 rock island passage to sturgeon bay wi-
250 pm cdt thu aug 13 2026

sturgeon bay wi to point betsie mi north...

.tonight...north winds 5 to 10 kt becoming northeast. waves 1 ft
or less. 
.friday...northeast winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft. 
.friday night...northeast winds 10 to 20 kt becoming east 10 to
15 kt. waves 1 to 2 ft. 
.saturday...southeast winds 10 to 20 kt. chance of showers. waves
1 to 3 ft. 
.saturday night...southeast winds 10 to 20 kt veering to
southwest. chance of showers. waves 2 to 4 ft. 
.sunday...northwest winds 10 to 20 kt increasing to 15 to 25 kt.
chance of showers in the morning. waves 1 to 3 ft. 
.sunday night...north winds 15 to 25 kt diminishing to 10 to
15 kt. waves 1 to 3 ft. 
.monday...northwest winds 10 to 15 kt becoming west 10 to 20 kt.
waves 1 to 2 ft. 
.tuesday...southwest winds 15 to 25 kt increasing to 30 kt. waves
2 to 4 ft.  

$$

fzus63 kmkx 131401
glflm 
expires:202608132130;;118650

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
issued by national weather service green bay wi
901 am cdt thu aug 13 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...

a stalled frontal boundary just to the south of lake michigan will 
remain in place until midday today, before retreating toward the 
ohio river valley. periodic rain, storms and patches of fog will 
be possible across until the front moves south, with the highest
rain chances across the southern half of the lake this afternoon
into tonight. light and variable winds are expected across the 
lake today into tonight. 

high pressure around 30.3 inches is expected to build down from 
ontario into the eastern great lakes tonight into friday. 
northeast to east winds will increase across the lake becoming 
breezy as the high pressure builds in and a low pressure system 
develops across the central plains. as the low pressure around 
29.9 inches moves northeast toward the great lakes region, the 
high pressure will be slowly moving northeast toward the new 
england states. winds will turn to southeasterly and remain breezy
saturday ahead of the approaching low. this low is expected to 
track across the lake late saturday into sunday. rain and 
thunderstorms will be possible across the lake saturday into 
saturday night. as the low exits to the northeast sunday, high 
pressure around 30.2 inches is expected to move in from the 
northern plains for early next week.


lmz261-362-364-366-563-565-567-868-132130-
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-
901 am cdt thu aug 13 2026

sheboygan wi to pentwater mi north...

.rest of today...north winds less than 10 kt backing to
southwest. waves 1 ft or less. 
.tonight...north winds 5 to 10 kt becoming northeast late in the
evening, then becoming northeast 10 to 15 kt overnight. waves
1 to 2 ft. 
.friday...northeast winds 10 to 15 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.friday night...northeast winds 10 to 20 kt becoming southeast.
waves 2 to 4 ft. 
.saturday...southeast winds 15 to 25 kt. chance of showers. waves
4 to 6 ft occasionally to 8 ft. 
.saturday night...south winds 10 to 20 kt becoming southwest
10 to 15 kt. showers likely with a chance of thunderstorms. waves
3 to 5 ft subsiding to 2 to 4 ft. 
.sunday...northwest winds 10 to 20 kt becoming north 15 to 25 kt.
waves 1 to 3 ft. 
.monday...north winds 10 to 20 kt backing to west. waves 1 to
3 ft.  

$$

fzus63 kmkx 131401
glflm 
expires:202608132130;;118651

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
issued by national weather service green bay wi
901 am cdt thu aug 13 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...

a stalled frontal boundary just to the south of lake michigan will 
remain in place until midday today, before retreating toward the 
ohio river valley. periodic rain, storms and patches of fog will 
be possible across until the front moves south, with the highest
rain chances across the southern half of the lake this afternoon
into tonight. light and variable winds are expected across the 
lake today into tonight. 

high pressure around 30.3 inches is expected to build down from 
ontario into the eastern great lakes tonight into friday. 
northeast to east winds will increase across the lake becoming 
breezy as the high pressure builds in and a low pressure system 
develops across the central plains. as the low pressure around 
29.9 inches moves northeast toward the great lakes region, the 
high pressure will be slowly moving northeast toward the new 
england states. winds will turn to southeasterly and remain breezy
saturday ahead of the approaching low. this low is expected to 
track across the lake late saturday into sunday. rain and 
thunderstorms will be possible across the lake saturday into 
saturday night. as the low exits to the northeast sunday, high 
pressure around 30.2 inches is expected to move in from the 
northern plains for early next week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-132130-
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-
901 am cdt thu aug 13 2026

sheboygan wi to pentwater mi south...

.rest of today...southeast winds less than 10 kt becoming
northeast. chance of showers this afternoon. waves nearly calm. 
.tonight...northeast winds 5 to 10 kt becoming east. chance of
showers in the evening, then chance of showers and slight chance
of thunderstorms overnight. waves 1 to 2 ft. 
.friday...east winds 10 to 15 kt becoming northeast 10 to 20 kt
early in the afternoon, then increasing to 15 to 25 kt late.
chance of showers in the morning. waves 2 to 4 ft. 
.friday night...northeast winds 10 to 20 kt becoming southeast.
chance of showers overnight. waves 3 to 5 ft. 
.saturday...southeast winds 15 to 25 kt. showers likely. waves
4 to 6 ft occasionally to 8 ft. 
.saturday night...south winds 10 to 20 kt becoming southwest.
showers likely with a chance of thunderstorms. waves 3 to 5 ft
subsiding to 2 to 4 ft. 
.sunday...west winds 10 to 20 kt becoming northwest. waves 2 to
4 ft. 
.monday...north winds 10 to 20 kt. waves 2 to 4 ft.  

$$

fzus63 kmqt 132001
glfls 
expires:202608140800;;134272

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu aug 13 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...

this evening, weak 29.9 inch ridging over lake superior begins to 
yield to a developing 30.2 inch high over the canadian rockies. this 
high eventually becomes centered over the lake at 30.2 inches friday 
afternoon. a 29.9 inch trough then moves over the western end of the 
lake saturday overnight as the 30.2 inch high moves over the lower 
great lakes. this trough consolidates to a 29.8 inch low as it 
passes over lake superior, reaching the ontario/quebec line by 
sunday afternoon. sunday night into monday, a 30.1 inch high over 
the plains will weaken to 30.0 inches as it slides south of lake 
superior. by tuesday, this high will be fully south of the great 
lakes as a 29.5 inch low over hudson bay extends a 29.9 inch trough 
over lake superior.




lsz162-140800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu aug 13 2026 /301 pm cdt thu aug 13 2026/

.late this afternoon...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.friday...northeast winds 10 to 20 knots increasing to 20 to
30 knots. waves building to 2 to 4 feet. 
.friday night...northeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight, then becoming east 5 to 15 knots
late. a slight chance of showers after midnight. waves subsiding
to calm to 2 feet. 
.saturday...northeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 
.saturday night...northeast winds 5 to 15 knots backing northwest
after midnight. a chance of showers through midnight. waves calm
to 2 feet. 
.sunday...west winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots veering north. a chance
of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 132001
glfls 
expires:202608140800;;134273

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu aug 13 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...

this evening, weak 29.9 inch ridging over lake superior begins to 
yield to a developing 30.2 inch high over the canadian rockies. this 
high eventually becomes centered over the lake at 30.2 inches friday 
afternoon. a 29.9 inch trough then moves over the western end of the 
lake saturday overnight as the 30.2 inch high moves over the lower 
great lakes. this trough consolidates to a 29.8 inch low as it 
passes over lake superior, reaching the ontario/quebec line by 
sunday afternoon. sunday night into monday, a 30.1 inch high over 
the plains will weaken to 30.0 inches as it slides south of lake 
superior. by tuesday, this high will be fully south of the great 
lakes as a 29.5 inch low over hudson bay extends a 29.9 inch trough 
over lake superior.




lsz263-140800-
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-
401 pm edt thu aug 13 2026

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...northeast winds less than 10 knots increasing to 5 to
15 knots late. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots becoming northeast 15 to
25 knots in the afternoon, then becoming east 20 to 30 knots
late. waves building to 1 to 3 feet. 
.friday night...east winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...east winds 5 to 15 knots. a slight chance of showers
by mid afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots backing northwest
after midnight. a chance of showers. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots diminishing to less than
10 knots after midnight. waves calm to 2 feet. 
.monday...southwest winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 
.tuesday...west winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 132001
glfls 
expires:202608140800;;134274

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu aug 13 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...

this evening, weak 29.9 inch ridging over lake superior begins to 
yield to a developing 30.2 inch high over the canadian rockies. this 
high eventually becomes centered over the lake at 30.2 inches friday 
afternoon. a 29.9 inch trough then moves over the western end of the 
lake saturday overnight as the 30.2 inch high moves over the lower 
great lakes. this trough consolidates to a 29.8 inch low as it 
passes over lake superior, reaching the ontario/quebec line by 
sunday afternoon. sunday night into monday, a 30.1 inch high over 
the plains will weaken to 30.0 inches as it slides south of lake 
superior. by tuesday, this high will be fully south of the great 
lakes as a 29.5 inch low over hudson bay extends a 29.9 inch trough 
over lake superior.




lsz264-140800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt thu aug 13 2026

.late this afternoon...southwest winds less than 10 knots. waves
calm to 2 feet. 
.tonight...west winds less than 10 knots veering north after
midnight. waves calm to 2 feet. 
.friday...northeast winds less than 10 knots becoming east 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots backing east after
midnight. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots. a slight chance of showers
by mid afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots veering west
after midnight. a chance of showers. waves calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 
.tuesday...west winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 132001
glfls 
expires:202608140800;;134275

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu aug 13 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...

this evening, weak 29.9 inch ridging over lake superior begins to 
yield to a developing 30.2 inch high over the canadian rockies. this 
high eventually becomes centered over the lake at 30.2 inches friday 
afternoon. a 29.9 inch trough then moves over the western end of the 
lake saturday overnight as the 30.2 inch high moves over the lower 
great lakes. this trough consolidates to a 29.8 inch low as it 
passes over lake superior, reaching the ontario/quebec line by 
sunday afternoon. sunday night into monday, a 30.1 inch high over 
the plains will weaken to 30.0 inches as it slides south of lake 
superior. by tuesday, this high will be fully south of the great 
lakes as a 29.5 inch low over hudson bay extends a 29.9 inch trough 
over lake superior.




lsz265-140800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt thu aug 13 2026

.late this afternoon...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...west winds 5 to 15 knots veering north after midnight.
waves calm to 2 feet. 
.friday...north winds 5 to 15 knots veering northeast in the
afternoon, then becoming east 10 to 20 knots late. waves calm to
2 feet. 
.friday night...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.saturday...southeast winds 10 to 20 knots becoming east 15 to
25 knots by mid afternoon. a chance of showers by mid afternoon.
waves building to 1 to 3 feet. 
.saturday night...southeast winds 10 to 20 knots veering west
after midnight. a chance of showers. waves subsiding to calm to
2 feet. 
.sunday...northwest winds 10 to 20 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.sunday night...northwest winds 10 to 20 knots backing west after
midnight. waves subsiding to calm to 2 feet. 
.monday...west winds 5 to 15 knots becoming southwest 10 to
20 knots. waves calm to 2 feet. 
.tuesday...west winds 10 to 20 knots. a chance of showers. waves
calm to 2 feet. 

$$

fzus63 kmqt 132001
glfls 
expires:202608140800;;134276

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu aug 13 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...

this evening, weak 29.9 inch ridging over lake superior begins to 
yield to a developing 30.2 inch high over the canadian rockies. this 
high eventually becomes centered over the lake at 30.2 inches friday 
afternoon. a 29.9 inch trough then moves over the western end of the 
lake saturday overnight as the 30.2 inch high moves over the lower 
great lakes. this trough consolidates to a 29.8 inch low as it 
passes over lake superior, reaching the ontario/quebec line by 
sunday afternoon. sunday night into monday, a 30.1 inch high over 
the plains will weaken to 30.0 inches as it slides south of lake 
superior. by tuesday, this high will be fully south of the great 
lakes as a 29.5 inch low over hudson bay extends a 29.9 inch trough 
over lake superior.




lsz266-140800-
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-
401 pm edt thu aug 13 2026

.late this afternoon...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering north late.
waves calm to 2 feet. 
.friday...north winds 5 to 15 knots veering northeast in the
afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots backing east by mid
afternoon. a slight chance of showers by mid afternoon. waves
building to 1 to 3 feet. 
.saturday night...southeast winds 10 to 20 knots veering south
after midnight. a chance of showers. waves subsiding to calm to
2 feet. 
.sunday...northwest winds 10 to 20 knots. waves building to 2 to
4 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...west winds 5 to 15 knots backing south. waves calm to
2 feet. 
.tuesday...west winds 10 to 20 knots. a chance of showers. waves
calm to 2 feet. 

$$

fzus63 kmqt 132001
glfls 
expires:202608140800;;134277

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu aug 13 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...

this evening, weak 29.9 inch ridging over lake superior begins to 
yield to a developing 30.2 inch high over the canadian rockies. this 
high eventually becomes centered over the lake at 30.2 inches friday 
afternoon. a 29.9 inch trough then moves over the western end of the 
lake saturday overnight as the 30.2 inch high moves over the lower 
great lakes. this trough consolidates to a 29.8 inch low as it 
passes over lake superior, reaching the ontario/quebec line by 
sunday afternoon. sunday night into monday, a 30.1 inch high over 
the plains will weaken to 30.0 inches as it slides south of lake 
superior. by tuesday, this high will be fully south of the great 
lakes as a 29.5 inch low over hudson bay extends a 29.9 inch trough 
over lake superior.




lsz267-140800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt thu aug 13 2026

.late this afternoon...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...northwest winds 5 to 15 knots. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing northwest late. waves
calm to 2 feet. 
.friday night...north winds 5 to 15 knots veering east late.
waves calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots backing east by mid
afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 10 to 20 knots veering south
after midnight. a chance of showers through midnight, then
showers likely after midnight. waves calm to 2 feet. 
.sunday...west winds 10 to 20 knots veering northwest by mid
afternoon. waves building to 1 to 3 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves building to 2 to 4 feet, then
subsiding to calm to 2 feet. 
.monday...west winds 5 to 15 knots backing south. waves calm to
2 feet. 
.tuesday...west winds 5 to 15 knots increasing to 10 to 20 knots.
a chance of showers. waves calm to 2 feet. 

$$