fzus63 kmkx 011219
glflm 
expires:202610012115;;354593

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
719 am cdt thu oct 1 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...

modest southwest winds will continue this morning, then shift 
westerly ahead of a cold front by the middle of today. expect 
winds to then shift northwest with a frontal passage this
afternoon. modest to breezy northerly winds are then forecast 
tonight and friday. strong high pressure around 30.4 inches will 
then overspread the great lakes friday night. this should bring 
lighter winds to the lake friday night into saturday.

a fast-moving low pressure system around 29.8 inches should move 
across or north of lake superior saturday night, with high 
pressure around 30.4 inches moving southeast into the region by 
early next week. south to southwest winds saturday night should 
veer northwest to north sunday into monday across lake michigan.


lmz261-362-364-366-563-565-567-868-012115-
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-
719 am cdt thu oct 1 2026

sheboygan wi to pentwater mi north...

.rest of today...southwest winds 10 to 15 kt becoming northwest
10 to 20 kt. patchy fog this morning. showers this morning, then
chance of showers this afternoon. waves 2 to 4 ft. 
.tonight...north winds 10 to 20 kt becoming northwest. waves 3 to
5 ft. 
.friday...northwest winds 10 to 20 kt becoming north 15 to 25 kt.
waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. 
.friday night...north winds 15 to 25 kt becoming northeast 5 to
10 kt overnight. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.saturday...southeast winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 3 ft building to 2 to 4 ft. 
.saturday night...south winds 15 to 25 kt becoming southwest to
30 kt. waves 3 to 5 ft building to 4 to 6 ft occasionally to
8 ft. 
.sunday...west winds to 30 kt becoming northwest. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.monday...northwest winds 10 to 20 kt. waves 2 to 4 ft.  

$$

fzus63 kmkx 011219
glflm 
expires:202610012115;;354594

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
719 am cdt thu oct 1 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...

modest southwest winds will continue this morning, then shift 
westerly ahead of a cold front by the middle of today. expect 
winds to then shift northwest with a frontal passage this
afternoon. modest to breezy northerly winds are then forecast 
tonight and friday. strong high pressure around 30.4 inches will 
then overspread the great lakes friday night. this should bring 
lighter winds to the lake friday night into saturday.

a fast-moving low pressure system around 29.8 inches should move 
across or north of lake superior saturday night, with high 
pressure around 30.4 inches moving southeast into the region by 
early next week. south to southwest winds saturday night should 
veer northwest to north sunday into monday across lake michigan.


lmz080-669-671-673-675-777-779-870-872-874-876-878-012115-
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-
719 am cdt thu oct 1 2026

sheboygan wi to pentwater mi south...

.rest of today...south winds 10 to 15 kt veering to northwest
10 to 20 kt. patchy fog. showers and slight chance of
thunderstorms. waves 2 to 4 ft. 
.tonight...north winds 10 to 20 kt increasing to 15 to 25 kt.
patchy fog in the evening. scattered showers. waves 2 to 4 ft
building to 4 to 7 ft occasionally to 9 ft. 
.friday...north winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 4 to 7 ft occasionally to 9 ft. 
.friday night...north winds 10 to 20 kt becoming east 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft. 
.saturday...southeast winds 10 to 15 kt increasing to 10 to
20 kt. waves 2 to 4 ft. 
.saturday night...southeast winds 10 to 20 kt becoming south.
waves 3 to 5 ft. 
.sunday...southwest winds 10 to 20 kt becoming northwest. waves
3 to 5 ft. 
.monday...north winds 10 to 20 kt. waves 3 to 5 ft.  

$$