fzus63 kmkx 040145
glflm 
expires:202608040915;;582114

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
845 pm cdt mon aug 3 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...

30.1 inch high pressure will shift eastward tonight into tuesday,
with winds shifting southerly. a cold front moves into the 
western great lakes late tuesday afternoon through wednesday, 
bringing a brief north-northwest wind shift across the open 
waters. periods of showers and storms will accompany the front, 
with severe weather appearing unlikely at this time. winds will 
trend variable once more wednesday evening through thursday, when 
30.0 inch high pressure is forecast to build back into the 
western great lakes.

a prolonged period of south-southwest winds will become established 
across lake michigan thursday night through sunday as 30.1 inch 
high pressure lingers off the mid-atlantic coast and 29.6 inch 
low pressure stalls over the hudson bay. shower and storm chances 
return to the forecast saturday night into the beginning of next 
week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-040915-
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-
845 pm cdt mon aug 3 2026

sheboygan wi to pentwater mi south...

.rest of tonight...southeast winds 10 to 15 kt becoming south.
waves 1 to 2 ft. 
.tuesday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft building to 3 to 5 ft. 
.tuesday night...south winds 15 to 25 kt diminishing to 10 to
20 kt late in the evening, then becoming southwest after midnight
diminishing to 10 to 15 kt late. chance of showers and
thunderstorms. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.wednesday...southwest winds 10 to 15 kt becoming south. showers
likely in the morning, then chance of showers in the afternoon.
waves 1 to 3 ft. 
.wednesday night...east winds 5 to 10 kt veering to south.
showers with a chance of thunderstorms in the evening, then
showers overnight. waves 1 ft or less. 
.thursday...northwest winds 5 to 10 kt becoming north 10 to
15 kt. chance of showers. waves 1 ft or less. 
.thursday night...northeast winds 5 to 10 kt backing to
southwest. waves 1 ft or less. 
.friday...southwest winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 2 ft. 
.saturday...southwest winds 10 to 20 kt becoming south. waves
1 to 3 ft.  

$$

fzus63 kmkx 040145
glflm 
expires:202608040915;;582113

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
845 pm cdt mon aug 3 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...

30.1 inch high pressure will shift eastward tonight into tuesday,
with winds shifting southerly. a cold front moves into the 
western great lakes late tuesday afternoon through wednesday, 
bringing a brief north-northwest wind shift across the open 
waters. periods of showers and storms will accompany the front, 
with severe weather appearing unlikely at this time. winds will 
trend variable once more wednesday evening through thursday, when 
30.0 inch high pressure is forecast to build back into the 
western great lakes.

a prolonged period of south-southwest winds will become established 
across lake michigan thursday night through sunday as 30.1 inch 
high pressure lingers off the mid-atlantic coast and 29.6 inch 
low pressure stalls over the hudson bay. shower and storm chances 
return to the forecast saturday night into the beginning of next 
week.


lmz261-362-364-366-563-565-567-868-040915-
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-
845 pm cdt mon aug 3 2026

sheboygan wi to pentwater mi north...

.rest of tonight...south winds 10 to 20 kt. waves 2 to 4 ft.
.tuesday...south winds 15 to 25 kt increasing to 30 kt. waves
2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.tuesday night...southwest winds 15 to 25 kt diminishing to 10 to
20 kt late in the evening, then becoming west 10 to 15 kt after
midnight becoming northwest late. showers likely with a chance of
thunderstorms in the evening, then chance of showers overnight.
waves 3 to 5 ft subsiding to 2 to 4 ft. 
.wednesday...northeast winds 10 to 15 kt backing to southwest.
chance of showers in the morning. waves 1 to 3 ft. 
.wednesday night...southeast winds 5 to 10 kt becoming east.
chance of showers overnight. waves 1 ft or less. 
.thursday...east winds 10 to 15 kt veering to southwest 10 to
20 kt. waves 1 to 2 ft. 
.thursday night...south winds 10 to 20 kt becoming southwest.
waves 1 to 3 ft. 
.friday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.saturday...southwest winds 10 to 20 kt increasing to 15 to
25 kt. waves 2 to 4 ft.  

$$