fzus63 kmkx 271948
glflm 
expires:202608280315;;461003

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
248 pm cdt thu aug 27 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 northerly winds continue this afternoon as a low 
pressure trough of 29.9 inches exits eastward from lower
michigan. winds then become light and variable tonight and 
friday as high pressure of 30.2 inches moves from the northern 
great lakes to the lower great lakes. 

high pressure then pulls east saturday and low pressure of 29.7
inches will slowly approach from the great plains. breezy 
southerly winds are expected this weekend into early next week,
but gusts are expected to remain below gale force.


lmz261-362-364-366-563-565-567-868-280315-
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-
248 pm cdt thu aug 27 2026

sheboygan wi to pentwater mi north...

.tonight...northeast winds 10 to 20 kt diminishing to 5 to 10 kt.
waves 1 to 3 ft subsiding to 1 to 2 ft. 
.friday...northeast winds 5 to 10 kt veering to south. waves 1 to
3 ft. 
.friday night...southeast winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 3 ft. 
.saturday...southwest winds 15 to 25 kt increasing to 30 kt.
waves 3 to 5 ft. 
.saturday night...southwest winds 15 to 25 kt. chance of showers
overnight. waves 4 to 6 ft occasionally to 8 ft. 
.sunday...south winds to 30 kt. chance of showers in the morning,
then showers likely with a chance of thunderstorms in the
afternoon. waves 6 to 9 ft occasionally to 12 ft. 
.sunday night...south winds to 30 kt diminishing to 10 to 20 kt.
chance of showers. waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 6 ft occasionally to 8 ft. 
.monday...south winds 15 to 25 kt. chance of showers. waves 4 to
6 ft occasionally to 8 ft. 
.tuesday...west winds 10 to 20 kt becoming southwest. waves 1 to
3 ft.  

$$

fzus63 kmkx 271948
glflm 
expires:202608280315;;461004

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
248 pm cdt thu aug 27 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 northerly winds continue this afternoon as a low 
pressure trough of 29.9 inches exits eastward from lower
michigan. winds then become light and variable tonight and 
friday as high pressure of 30.2 inches moves from the northern 
great lakes to the lower great lakes. 

high pressure then pulls east saturday and low pressure of 29.7
inches will slowly approach from the great plains. breezy 
southerly winds are expected this weekend into early next week,
but gusts are expected to remain below gale force.


lmz080-669-671-673-675-777-779-870-872-874-876-878-280315-
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-
248 pm cdt thu aug 27 2026

sheboygan wi to pentwater mi south...

.tonight...northeast winds 10 to 20 kt diminishing to 5 to 10 kt
late this evening, then becoming northeast 5 to 10 kt after
midnight becoming east late. waves 1 to 3 ft subsiding to 1 to
2 ft. 
.friday...southeast winds 5 to 10 kt becoming south 10 to 20 kt.
waves 1 to 3 ft. 
.friday night...south winds 10 to 20 kt becoming southwest. waves
2 to 4 ft. 
.saturday...southwest winds 10 to 20 kt becoming south 15 to
25 kt. waves 3 to 5 ft. 
.saturday night...south winds 15 to 25 kt. chance of showers.
waves 4 to 6 ft occasionally to 8 ft. 
.sunday...south winds to 30 kt. chance of showers. waves 6 to
9 ft occasionally to 12 ft. 
.sunday night...south winds to 30 kt diminishing to 10 to 20 kt.
chance of showers and thunderstorms. waves 5 to 8 ft occasionally
to 10 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.monday...southwest winds 15 to 25 kt becoming south. chance of
showers. waves 4 to 6 ft occasionally to 8 ft. 
.tuesday...southwest winds 10 to 20 kt becoming south. chance of
showers. waves 2 to 4 ft.  

$$