fzus63 kmkx 041956
glflm 
expires:202610050315;;534419

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
256 pm cdt sun oct 4 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...

low pressure moving east across southern canada today will deepen
to 29.4 inches and approach james bay by late this afternoon. a 
cold front has exited to the east of lake michigan and northwest 
winds will remain breezy today. northwest winds will gradually 
decrease tonight into monday as high pressure of 30.2 inches 
enters from the west. a few waterspouts remain possible across the
far northern edge of the lake this evening into tonight.

low pressure of 29.4 inches will build toward the hudson bay 
tuesday through thursday. ahead of this low, south southwest 
winds will increase tuesday afternoon through wednesday and 
become gusty. there remains a risk for gusts to approach gales, 
particularly over the northern half of the open waters, and will
continue to be monitored for possible headlines. the low will 
pull a cold front across the waters wednesday night into 
thursday, delivering scattered showers and shifting winds to 
the west northwest.


lmz261-362-364-366-563-565-567-868-050315-
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-
256 pm cdt sun oct 4 2026

sheboygan wi to pentwater mi north...

.tonight...northwest winds to 30 kt diminishing to 15 to 25 kt.
slight chance of waterspouts. waves 4 to 6 ft occasionally to
8 ft. 
.monday...northwest winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 3 to 5 ft subsiding to 1 to 3 ft. 
.monday night...north winds 10 to 20 kt veering to southeast 5 to
10 kt late in the evening, then becoming south after midnight
becoming 10 to 20 kt late. waves 1 to 2 ft building to 2 to 4 ft.
.tuesday...south winds to 30 kt increasing to gales to 35 kt in 
the afternoon. waves 6 to 9 ft occasionally to 12 ft building to 
10 to 14 ft occasionally to 18 ft. 
.tuesday night...southwest gales to 35 kt becoming west to 30 kt.
waves 8 to 12 ft occasionally to 16 ft subsiding to 5 to 8 ft
occasionally to 10 ft. 
.wednesday...northwest winds 15 to 25 kt becoming west. waves
3 to 5 ft subsiding to 1 to 3 ft. 
.wednesday night...west winds 10 to 20 kt becoming northwest.
waves 2 to 4 ft. 
.thursday...northwest winds 15 to 25 kt becoming west. waves 2 to
4 ft. 
.friday...west winds 10 to 20 kt becoming northwest. waves 1 to
3 ft.  

$$

fzus63 kmkx 041956
glflm 
expires:202610050315;;534420

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
256 pm cdt sun oct 4 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...

low pressure moving east across southern canada today will deepen
to 29.4 inches and approach james bay by late this afternoon. a 
cold front has exited to the east of lake michigan and northwest 
winds will remain breezy today. northwest winds will gradually 
decrease tonight into monday as high pressure of 30.2 inches 
enters from the west. a few waterspouts remain possible across the
far northern edge of the lake this evening into tonight.

low pressure of 29.4 inches will build toward the hudson bay 
tuesday through thursday. ahead of this low, south southwest 
winds will increase tuesday afternoon through wednesday and 
become gusty. there remains a risk for gusts to approach gales, 
particularly over the northern half of the open waters, and will
continue to be monitored for possible headlines. the low will 
pull a cold front across the waters wednesday night into 
thursday, delivering scattered showers and shifting winds to 
the west northwest.


lmz080-669-671-673-675-777-779-870-872-874-876-878-050315-
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-
256 pm cdt sun oct 4 2026

sheboygan wi to pentwater mi south...

.tonight...northwest winds 10 to 20 kt becoming north. waves 4 to
6 ft occasionally to 8 ft. 
.monday...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 night...north winds 5 to 10 kt veering to southeast late
in the evening, then becoming south 10 to 15 kt after midnight
increasing to 10 to 20 kt late. waves 1 to 3 ft building to 2 to
4 ft. 
.tuesday...south winds to 30 kt increasing to gales to 35 kt.
waves 6 to 9 ft occasionally to 12 ft building to 8 to 12 ft
occasionally to 16 ft. 
.tuesday night...southwest gales to 35 kt becoming west 15 to
25 kt overnight. waves 8 to 12 ft occasionally to 16 ft subsiding
to 5 to 8 ft occasionally to 10 ft. 
.wednesday...west winds 10 to 20 kt. waves 4 to 6 ft occasionally
to 8 ft subsiding to 2 to 4 ft. 
.wednesday night...west winds 10 to 20 kt becoming northwest.
waves 2 to 4 ft building to 3 to 5 ft. 
.thursday...northwest winds 10 to 20 kt becoming west. waves 3 to
5 ft. 
.friday...southwest winds 10 to 20 kt. waves 2 to 4 ft.  

$$