fzus63 kmkx 060233
glflm 
expires:202608061000;;690345

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
933 pm cdt wed aug 5 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...

light winds are expected tonight into friday morning, as high
pressure of 30.0 inches gradually moves through the region. areas
of fog will be possible tonight into thursday morning. southerly
winds will increase by friday afternoon as the high departs to the
east and low pressure of 29.8 inches reaches lake superior from
the west. scattered showers and storms are possible friday night
as the low drags a cold front across the lake. west to northwest
winds behind the front later friday night into early saturday will
quickly return to southerly by saturday evening ahead of the next
approaching low pressure system. 


lmz261-362-364-366-563-565-567-868-061000-
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-
933 pm cdt wed aug 5 2026

sheboygan wi to pentwater mi north...

.rest of tonight...northwest winds 5 to 10 kt veering to east.
patchy fog overnight. waves 1 ft or less. 
.thursday...southeast winds 5 to 10 kt veering to southwest.
patchy fog in the morning. waves 1 ft or less. 
.thursday night...south winds 10 to 15 kt. waves 1 ft or less. 
.friday...south winds 10 to 20 kt. waves 1 to 2 ft building to
2 to 4 ft. 
.friday night...south winds 15 to 25 kt becoming southwest 10 to
20 kt. chance of showers. waves 2 to 4 ft. 
.saturday...northwest winds 10 to 20 kt becoming southwest. waves
1 to 3 ft. 
.saturday night...south winds 10 to 20 kt becoming southwest
10 to 15 kt. waves 1 to 3 ft. 
.sunday...southwest winds 10 to 20 kt. waves 1 to 3 ft. 
.monday...south winds 10 to 15 kt becoming southwest 10 to 20 kt.
chance of showers. waves 1 to 2 ft.  

$$

fzus63 kmkx 060233
glflm 
expires:202608061000;;690346

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
933 pm cdt wed aug 5 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...

light winds are expected tonight into friday morning, as high
pressure of 30.0 inches gradually moves through the region. areas
of fog will be possible tonight into thursday morning. southerly
winds will increase by friday afternoon as the high departs to the
east and low pressure of 29.8 inches reaches lake superior from
the west. scattered showers and storms are possible friday night
as the low drags a cold front across the lake. west to northwest
winds behind the front later friday night into early saturday will
quickly return to southerly by saturday evening ahead of the next
approaching low pressure system. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-061000-
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-
933 pm cdt wed aug 5 2026

sheboygan wi to pentwater mi south...

.rest of tonight...south winds 10 to 15 kt backing to northeast.
chance of showers and slight chance of thunderstorms through
early evening, then chance of showers overnight. patchy fog
overnight. waves 1 to 2 ft. 
.thursday...east winds 5 to 10 kt backing to north. patchy fog in
the morning. slight chance of showers in the morning. waves 1 to
2 ft. 
.thursday night...northeast winds 5 to 10 kt veering to
southwest. waves 1 ft or less. 
.friday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 ft or less building to 1 to 3 ft. 
.friday night...south winds 10 to 20 kt becoming southwest.
chance of showers overnight. waves 2 to 4 ft. 
.saturday...west winds 10 to 20 kt becoming southwest 10 to
15 kt. waves 2 to 4 ft. 
.saturday night...south winds 10 to 15 kt becoming southwest.
waves 1 to 3 ft. 
.sunday...southwest winds 10 to 20 kt becoming south. waves 1 to
3 ft. 
.monday...southwest winds 10 to 20 kt. showers likely with a
chance of thunderstorms. waves 1 to 3 ft.  

$$