fzus63 kmkx 200759
glflm 
expires:202603201515;;994639

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 am cdt fri mar 20 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...

south to southwest winds continue as a low pressure around 29.7
inches moves southeast through northern lower michigan. winds will
shift to northwest to north later this morning as cold front
shifts across the lake behind the exiting low. tonight winds will
become light as high pressure around 30.3 inches builds in from
ontario. 

low pressure around 29.5 inches develops in the lee of the 
wyoming rockies saturday morning, shifting winds south. the low 
should move southeastward saturday night, allowing winds to 
increase and shift to the north and northeast across the northern
half of the lake. 

the low should move across central illinois into indiana sunday, 
as it deepens to around 29.4 inches. this should lead to northerly
winds backing to northwesterly sunday into sunday night across the
lake. a few gales are possible during this timeframe. high 
pressure around 30.5 inches should then bring decreasing winds 
for monday.


lmz261-362-364-366-563-565-567-868-201515-
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-
259 am cdt fri mar 20 2026

sheboygan wi to pentwater mi north...

.today...west winds 10 to 20 kt becoming north 10 to 15 kt.
patchy fog this morning. chance of light freezing rain and slight
chance of rain this morning. waves 2 to 4 ft. 
.tonight...north winds 10 to 15 kt backing to southwest 5 to
10 kt. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.saturday...south winds 5 to 10 kt increasing to 10 to 20 kt.
waves 1 to 2 ft building to 2 to 4 ft. 
.saturday night...south winds 10 to 15 kt backing to north 10 to
20 kt. chance of rain in the evening, then chance of rain and
light freezing rain overnight. waves 2 to 4 ft. 
.sunday...north winds 15 to 25 kt increasing to 30 kt. chance of
rain in the morning. waves 4 to 6 ft occasionally to 8 ft
building to 5 to 8 ft occasionally to 10 ft. 
.sunday night...north winds to 30 kt diminishing to 10 to 20 kt.
waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.monday...north winds 10 to 20 kt becoming northwest. waves 3 to
5 ft subsiding to 2 to 4 ft. 
.tuesday...southwest winds to 30 kt diminishing to 15 to 25 kt.
waves 5 to 8 ft occasionally to 10 ft.  

$$

fzus63 kmkx 200759
glflm 
expires:202603201515;;994640

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 am cdt fri mar 20 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...

south to southwest winds continue as a low pressure around 29.7
inches moves southeast through northern lower michigan. winds will
shift to northwest to north later this morning as cold front
shifts across the lake behind the exiting low. tonight winds will
become light as high pressure around 30.3 inches builds in from
ontario. 

low pressure around 29.5 inches develops in the lee of the 
wyoming rockies saturday morning, shifting winds south. the low 
should move southeastward saturday night, allowing winds to 
increase and shift to the north and northeast across the northern
half of the lake. 

the low should move across central illinois into indiana sunday, 
as it deepens to around 29.4 inches. this should lead to northerly
winds backing to northwesterly sunday into sunday night across the
lake. a few gales are possible during this timeframe. high 
pressure around 30.5 inches should then bring decreasing winds 
for monday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-201515-
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-
259 am cdt fri mar 20 2026

sheboygan wi to pentwater mi south...

.today...southwest winds 10 to 20 kt veering to north. waves 3 to
5 ft subsiding to 2 to 4 ft. 
.tonight...north winds 10 to 15 kt becoming east 5 to 10 kt.
waves 2 to 4 ft subsiding to 1 to 2 ft. 
.saturday...southeast winds 5 to 10 kt increasing to 10 to 15 kt
late in the morning, then becoming south 10 to 20 kt in the
afternoon. waves 1 to 2 ft building to 2 to 4 ft. 
.saturday night...south winds 10 to 15 kt becoming west 10 to
20 kt. waves 3 to 5 ft. 
.sunday...north winds 15 to 25 kt increasing to 30 kt. chance of
rain. waves 4 to 7 ft occasionally to 9 ft building to 7 to 10 ft
occasionally to 13 ft. 
.sunday night...north winds to 30 kt diminishing to 15 to 25 kt.
waves 8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.monday...north winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft
occasionally to 8 ft. 
.tuesday...south winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 4 to 7 ft occasionally to 9 ft.  

$$