fzus63 kdtx 221947
glflh 
expires:202608230400;;183955

open lake forecast for lake huron
national weather service detroit/pontiac mi
347 pm edt sat aug 22 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 cold front continues to progress across the great
lake this evening, which will veer wind direction to the
northwest. showers and thunderstorms are expected along the
front. post-frontal northwest flow leads to gusty winds through
the day on sunday and monday.


lhz361-230400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
347 pm edt sat aug 22 2026

.tonight...northwest winds 15 to 20 knots. waves 3 to 5 feet. 
.sunday...northwest winds 15 to 20 knots increasing to 20 to
25 knots with gusts to around 30 knots in the late morning and
afternoon. waves 5 to 7 feet. waves occasionally around 10 feet. 
.sunday night...northwest winds 20 to 25 knots with gusts to
around 30 knots. a chance of showers. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.monday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots with gusts to around
30 knots in the late morning and afternoon. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.monday night...northwest winds 15 to 20 knots decreasing to 5 to
10 knots. waves 3 to 5 feet subsiding to 1 to 3 feet after
midnight. 
.tuesday...west winds 5 to 10 knots becoming light and variable...
then becoming south 5 to 10 knots late in the evening. waves
2 feet or less. 
.wednesday...south winds 5 to 10 knots backing to the southeast .
a chance of showers early in the morning...then showers likely.
waves 1 to 3 feet. 
.thursday...southeast winds 5 to 10 knots becoming southwest
10 to 15 knots until early evening...then veering to the
northwest by midnight. a chance of showers. waves 1 to 3 feet. 


$$

fzus63 kdtx 221947
glflh 
expires:202608230400;;183956

open lake forecast for lake huron
national weather service detroit/pontiac mi
347 pm edt sat aug 22 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 cold front continues to progress across the great
lake this evening, which will veer wind direction to the
northwest. showers and thunderstorms are expected along the
front. post-frontal northwest flow leads to gusty winds through
the day on sunday and monday.


lhz362-363-230400-
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-
347 pm edt sat aug 22 2026

.tonight...northwest winds 10 to 15 knots increasing to 20 to
25 knots. a chance of showers and thunderstorms in the evening.
waves 4 to 6 feet building to 6 to 9 feet after midnight. waves
occasionally around 12 feet. 
.sunday...northwest winds 20 to 25 knots with gusts to around
30 knots. a chance of waterspouts in the morning. waves 8 to
12 feet. waves occasionally around 15 feet. 
.sunday night...northwest winds 20 to 25 knots with gusts to
around 30 knots. a chance of waterspouts in the evening. a chance
of showers. waves 8 to 12 feet. waves occasionally around
15 feet. 
.monday...northwest winds 20 to 25 knots decreasing to 15 to
20 knots early in the afternoon. gusts to 30 knots. a chance of
showers in the morning. waves 8 to 12 feet. waves occasionally
around 15 feet. 
.monday night...northwest winds 15 to 20 knots decreasing to
10 to 15 knots in the late evening and overnight. waves 4 to
6 feet. 
.tuesday...northwest winds 5 to 10 knots becoming light and
variable...then becoming southeast 5 to 10 knots late in the
evening. waves 1 to 3 feet. waves occasionally around 8 feet. 
.wednesday...south winds 5 to 10 knots becoming southeast 10 to
15 knots. a chance of showers in the late morning and early
afternoon. rain showers likely . waves 1 to 3 feet building to
2 to 4 feet . 
.thursday...south winds 10 to 15 knots becoming southwest 5 to
10 knots until early evening...then becoming northwest 10 to
15 knots by midnight. a chance of showers. waves 2 to 4 feet
subsiding to 1 to 3 feet. 


$$

fzus63 kdtx 221947
glflh 
expires:202608230400;;183957

open lake forecast for lake huron
national weather service detroit/pontiac mi
347 pm edt sat aug 22 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 cold front continues to progress across the great
lake this evening, which will veer wind direction to the
northwest. showers and thunderstorms are expected along the
front. post-frontal northwest flow leads to gusty winds through
the day on sunday and monday.


lhz462>464-230400-
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-
347 pm edt sat aug 22 2026

.tonight...northwest winds 10 to 15 knots increasing to 15 to
20 knots after midnight. a chance of waterspouts in the evening.
a chance of showers and thunderstorms in the evening...then a
chance of showers after midnight. waves 1 to 3 feet building to
6 to 9 feet. waves occasionally around 12 feet. 
.sunday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots with gusts to around
30 knots late in the afternoon. a chance of showers in the
morning...then a chance of showers and thunderstorms in the
afternoon. waves 8 to 12 feet. waves occasionally around 15 feet.
.sunday night...northwest winds 15 to 20 knots increasing to
20 to 25 knots with gusts to around 30 knots in the late evening
and overnight. a chance of showers and thunderstorms in the
evening...then a chance of showers after midnight. waves 8 to
12 feet. waves occasionally around 15 feet. 
.monday...west winds 20 to 25 knots with gusts to around 30 knots
becoming northwest 15 to 20 knots with gusts to around 30 knots
in the late morning and afternoon. a chance of showers in the
morning. waves 6 to 9 feet. waves occasionally around 12 feet. 
.monday night...northwest winds 10 to 15 knots. waves 4 to
6 feet. waves occasionally around 8 feet. 
.tuesday...northwest winds 5 to 10 knots becoming light and
variable...then becoming southeast 5 to 10 knots late in the
evening. waves 2 to 4 feet subsiding to 2 feet or less. 
.wednesday...south winds 5 to 10 knots increasing to 10 to
15 knots. a chance of showers. waves 1 to 3 feet. 
.thursday...south winds 10 to 15 knots becoming southwest 5 to
10 knots until early evening...then veering to the west by
midnight. a chance of showers. waves 1 to 3 feet. 


$$

fzus63 kmkx 222007
glflm 
expires:202608230315;;184920

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
307 pm cdt sat aug 22 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...

29.8 inch low pressure is centered over the southern hudson bay 
this afternoon, resulting in generally northwest winds across the
open waters of lake michigan. these winds will continue into this
evening as a weak cold front moves across the lake and 30.2 inch 
high pressure builds into the northern great plains. isolated 
showers and thunderstorms are possible along the passing front 
this afternoon & evening. severe weather potential is low in this 
activity, though an isolated stronger storm with gusty winds or a 
waterspout can't be entirely ruled out. will be watching radar 
trends for any potential marine weather statements or special 
marine warnings through this evening. northwest winds will 
continue through the day sunday, ultimately weakening by sunday 
night as the aforementioned area of high pressure approaches lake 
michigan. 

light and variable winds will continue monday with high pressure 
lingering in the vicinity. the high will shift east into ontario by 
tuesday, resulting in a south-southwest wind shift across the 
waters. 29.7 inch low pressure will approach from the northern 
great plains tuesday night into wednesday, reinforcing the south- 
southwesterly wind pattern. the low will cross lake michigan 
during the second half of the day wednesday, bringing a northwest 
wind shift. gales are not expected as this occurs. showers and 
thunderstorms will accompany the approaching/passing surface low 
tuesday night into wednesday afternoon. it remains too early to 
tell if any of these storms could be severe, with trends being 
monitored into the beginning of next week.


lmz261-362-364-366-563-565-567-868-230315-
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-
307 pm cdt sat aug 22 2026

sheboygan wi to pentwater mi north...

.tonight...north winds to 30 kt becoming northwest 15 to 25 kt.
slight chance of showers this evening. slight chance of
waterspouts. waves 4 to 6 ft occasionally to 8 ft. 
.sunday...northwest winds 15 to 25 kt becoming north to 30 kt.
waves 4 to 6 ft occasionally to 8 ft. 
.sunday night...north winds to 30 kt becoming northwest 15 to
25 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft. 
.monday...northwest winds 15 to 25 kt becoming north. waves 2 to
4 ft. 
.monday night...north winds 10 to 20 kt backing to west 5 to
10 kt overnight. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.tuesday...southwest winds 10 to 15 kt increasing to 15 to 25 kt
in the afternoon. waves 1 ft or less building to 1 to 3 ft. 
.tuesday night...south winds 15 to 25 kt diminishing to 10 to
20 kt. chance of showers. waves 2 to 4 ft. 
.wednesday...southwest winds 15 to 25 kt becoming south to 30 kt.
chance of showers. waves 4 to 6 ft occasionally to 8 ft. 
.thursday...northwest winds 10 to 20 kt becoming north 15 to
25 kt. waves 1 to 3 ft.  

$$

fzus63 kmkx 222007
glflm 
expires:202608230315;;184921

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
307 pm cdt sat aug 22 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...

29.8 inch low pressure is centered over the southern hudson bay 
this afternoon, resulting in generally northwest winds across the
open waters of lake michigan. these winds will continue into this
evening as a weak cold front moves across the lake and 30.2 inch 
high pressure builds into the northern great plains. isolated 
showers and thunderstorms are possible along the passing front 
this afternoon & evening. severe weather potential is low in this 
activity, though an isolated stronger storm with gusty winds or a 
waterspout can't be entirely ruled out. will be watching radar 
trends for any potential marine weather statements or special 
marine warnings through this evening. northwest winds will 
continue through the day sunday, ultimately weakening by sunday 
night as the aforementioned area of high pressure approaches lake 
michigan. 

light and variable winds will continue monday with high pressure 
lingering in the vicinity. the high will shift east into ontario by 
tuesday, resulting in a south-southwest wind shift across the 
waters. 29.7 inch low pressure will approach from the northern 
great plains tuesday night into wednesday, reinforcing the south- 
southwesterly wind pattern. the low will cross lake michigan 
during the second half of the day wednesday, bringing a northwest 
wind shift. gales are not expected as this occurs. showers and 
thunderstorms will accompany the approaching/passing surface low 
tuesday night into wednesday afternoon. it remains too early to 
tell if any of these storms could be severe, with trends being 
monitored into the beginning of next week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-230315-
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-
307 pm cdt sat aug 22 2026

sheboygan wi to pentwater mi south...

.tonight...north winds 15 to 25 kt becoming northwest 10 to
20 kt. slight chance of waterspouts. slight chance of showers and
thunderstorms this evening, then slight chance of showers
overnight. waves 3 to 5 ft. 
.sunday...northwest winds 15 to 25 kt becoming north to 30 kt.
slight chance of waterspouts in the morning. waves 4 to 7 ft
occasionally to 9 ft. 
.sunday night...north winds 10 to 20 kt diminishing to 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft. 
.monday...northwest winds 10 to 20 kt becoming north. waves 2 to
4 ft. 
.monday night...northeast winds 10 to 15 kt veering to south.
waves 1 to 3 ft. 
.tuesday...south winds 10 to 15 kt increasing to 15 to 25 kt in
the afternoon. waves 1 to 2 ft building to 1 to 3 ft. 
.tuesday night...south winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 2 to 4 ft. 
.wednesday...southwest winds 15 to 25 kt increasing to 30 kt.
chance of showers. waves 4 to 6 ft occasionally to 8 ft. 
.thursday...northwest winds 10 to 20 kt becoming north. waves
2 to 4 ft.  

$$

fzus63 kmqt 222001
glfls 
expires:202608230800;;184379

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 22 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...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is followed by 30.1 inch ridging for the latter 
part of the weekend into early next week via a 30.2 inch parent high 
from the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz162-230800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sat aug 22 2026 /301 pm cdt sat aug 22 2026/

.late this afternoon...northwest winds 10 to 20 knots. waves calm
to 2 feet. 
.tonight...northwest winds 10 to 20 knots veering north after
midnight. waves calm to 2 feet. 
.sunday...north winds 5 to 15 knots backing southwest late. waves
calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots becoming northwest
less than 10 knots after midnight. waves calm to 2 feet. 
.monday...north winds less than 10 knots becoming south 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots becoming south less than
10 knots after midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing east by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots backing north
after midnight. showers likely through midnight. a chance of
thunderstorms. a chance of showers after midnight. waves calm to
2 feet. 
.wednesday...northwest winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots veering north. waves
calm to 2 feet. 

$$

fzus63 kmqt 222001
glfls 
expires:202608230800;;184380

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 22 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...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is followed by 30.1 inch ridging for the latter 
part of the weekend into early next week via a 30.2 inch parent high 
from the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz263-230800-
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 sat aug 22 2026

.late this afternoon...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...north winds 10 to 20 knots. waves building to 2 to
4 feet. 
.sunday...north winds 10 to 20 knots becoming west 5 to 15 knots
late. waves subsiding to calm to 2 feet. 
.sunday night...west winds 5 to 15 knots veering northwest late.
waves calm to 2 feet. 
.monday...north winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing east by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.tuesday night...southeast winds 5 to 15 knots veering south
after midnight. showers likely and a chance of thunderstorms.
waves calm to 2 feet. 
.wednesday...north winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots veering north. waves
calm to 2 feet. 

$$

fzus63 kmqt 222001
glfls 
expires:202608230800;;184381

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 22 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...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is followed by 30.1 inch ridging for the latter 
part of the weekend into early next week via a 30.2 inch parent high 
from the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz264-230800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt sat aug 22 2026

.late this afternoon...northwest winds 10 to 20 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.tonight...north winds 15 to 25 knots diminishing to 10 to
20 knots late. waves building to 2 to 4 feet. 
.sunday...north winds 10 to 20 knots backing northwest late.
waves subsiding to calm to 2 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves calm to 2 feet. 
.monday...north winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.monday night...west winds 5 to 15 knots becoming southwest less
than 10 knots after midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.tuesday night...southeast winds 5 to 15 knots. a chance of
showers through midnight. a chance of thunderstorms. showers
likely after midnight. waves calm to 2 feet. 
.wednesday...east winds 5 to 15 knots backing north. waves calm
to 2 feet. 
.thursday...northwest winds 5 to 15 knots veering north. waves
calm to 2 feet. 

$$

fzus63 kmqt 222001
glfls 
expires:202608230800;;184382

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 22 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...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is followed by 30.1 inch ridging for the latter 
part of the weekend into early next week via a 30.2 inch parent high 
from the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz265-230800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt sat aug 22 2026

.late this afternoon...northwest winds 20 to 30 knots. waves 3 to
5 feet occasionally to 7 feet. 
.tonight...northwest winds 20 to 30 knots veering north after
midnight. a chance of showers after midnight. waves subsiding to
2 to 4 feet, then building to 3 to 6 feet occasionally to 8 feet.
.sunday...north winds 20 to 30 knots backing northwest late.
waves building to 5 to 8 feet occasionally to 10 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 
.sunday night...northwest winds 15 to 25 knots. waves subsiding
to 1 to 3 feet. 
.monday...northwest winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.monday night...west winds 5 to 15 knots backing southwest after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.tuesday night...southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight. showers likely. waves calm to
2 feet. 
.wednesday...southwest winds 10 to 20 knots veering northwest. a
chance of showers. waves calm to 2 feet. 
.thursday...north winds 15 to 25 knots becoming northwest 10 to
20 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 222001
glfls 
expires:202608230800;;184383

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 22 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...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is followed by 30.1 inch ridging for the latter 
part of the weekend into early next week via a 30.2 inch parent high 
from the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz266-230800-
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 sat aug 22 2026

.late this afternoon...northwest winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...northwest winds 20 to 30 knots veering north after
midnight. waves 3 to 6 feet occasionally to 8 feet. 
.sunday...north winds 20 to 30 knots backing northwest late.
waves building to 4 to 8 feet occasionally to 10 feet. 
.sunday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. waves subsiding to 2 to 4 feet. 
.monday...northwest winds 15 to 25 knots. waves subsiding to calm
to 2 feet. 
.monday night...northwest winds 5 to 15 knots backing west after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.tuesday night...southeast winds 10 to 20 knots becoming south
15 to 25 knots after midnight. a chance of showers through
midnight. showers likely after midnight. waves building to 1 to
3 feet. 
.wednesday...south winds 10 to 20 knots backing north. showers
likely. waves subsiding to calm to 2 feet, then building to 1 to
3 feet. 
.thursday...northwest winds 15 to 25 knots becoming north 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 222001
glfls 
expires:202608230800;;184384

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 22 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...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is followed by 30.1 inch ridging for the latter 
part of the weekend into early next week via a 30.2 inch parent high 
from the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz267-230800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt sat aug 22 2026

.late this afternoon...northwest winds 20 to 30 knots. isolated
showers. waves 3 to 5 feet occasionally to 7 feet. 
.tonight...northwest winds 20 to 30 knots veering north after
midnight. waves building to 3 to 6 feet occasionally to 8 feet. 
.sunday...north winds 20 to 30 knots backing northwest in the
afternoon, then increasing to 30 knots with a few gale force
gusts to 35 knots possible late. waves building to 5 to 8 feet
occasionally to 10 feet. 
.sunday night...northwest winds 20 to 30 knots. waves subsiding
to 3 to 6 feet occasionally to 8 feet. 
.monday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. waves subsiding to 2 to 4 feet. 
.monday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.tuesday...west winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.tuesday night...southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. a chance of showers. waves
building to 1 to 3 feet. 
.wednesday...southeast winds 10 to 20 knots. showers likely. a
chance of showers. waves subsiding to calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots veering north. waves
calm to 2 feet. 

$$