fzus63 kmkx 301404
glflm 
expires:202609302115;;302834

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
904 am cdt wed sep 30 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...

southerly winds will increase today, becoming southwest tonight 
into thursday, as a cold front approaches from the northern 
plains. wind gusts to 30 knots are possible today, along with 
building waves, particularly across central and northern portions 
of the lake. winds then ease tonight, as they become 
southwesterly.

expect northwest winds in the wake of the front thursday 
afternoon, with north to northeast winds thursday night into 
friday. strong high pressure around 30.4 inches will overspread 
the great lakes friday night. 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. northwest to north 
winds should result across lake michigan.


lmz261-362-364-366-563-565-567-868-302115-
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-
904 am cdt wed sep 30 2026

sheboygan wi to pentwater mi north...

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

$$

fzus63 kmkx 301404
glflm 
expires:202609302115;;302835

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
904 am cdt wed sep 30 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...

southerly winds will increase today, becoming southwest tonight 
into thursday, as a cold front approaches from the northern 
plains. wind gusts to 30 knots are possible today, along with 
building waves, particularly across central and northern portions 
of the lake. winds then ease tonight, as they become 
southwesterly.

expect northwest winds in the wake of the front thursday 
afternoon, with north to northeast winds thursday night into 
friday. strong high pressure around 30.4 inches will overspread 
the great lakes friday night. 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. northwest to north 
winds should result across lake michigan.


lmz080-669-671-673-675-777-779-870-872-874-876-878-302115-
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-
904 am cdt wed sep 30 2026

sheboygan wi to pentwater mi south...

.rest of today...south winds to 30 kt. showers late this morning,
then showers likely with slight chance of drizzle this afternoon.
waves 4 to 6 ft occasionally to 8 ft building to 5 to 8 ft
occasionally to 10 ft. 
.tonight...south winds 15 to 25 kt becoming southwest 10 to
20 kt. chance of showers and slight chance of thunderstorms in
the evening, then showers and slight chance of thunderstorms
overnight. waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 6 ft occasionally to 8 ft. 
.thursday...southwest winds 10 to 15 kt veering to west. showers
likely in the morning, then showers in the afternoon. waves 2 to
4 ft subsiding to 1 to 3 ft. 
.thursday night...north winds 10 to 20 kt. showers in the
evening, then chance of showers overnight. waves 2 to 4 ft
building to 4 to 6 ft occasionally to 8 ft. 
.friday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 4 to 7 ft occasionally to 9 ft. 
.friday night...north winds 10 to 20 kt becoming northeast 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft. 
.saturday...east winds 10 to 15 kt diminishing to 5 to 10 kt.
waves 1 to 3 ft. 
.sunday...west winds 15 to 25 kt becoming northwest. waves 3 to
5 ft.  

$$