532
FZUS63 KMKX 202044
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
244 PM CST Thu Nov 20 2025

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...

A weak cold front over the Upper Mississippi River Valley this
afternoon will slowly move across Lake Michigan tonight. Modest
southwest winds will shift northwesterly and continue through
Friday. Light to modest north winds Friday night will become light
and variable Saturday morning when high pressure moves across the
region. Winds will become southwesterly again Saturday afternoon
and evening, then westerly late Saturday night and Sunday with the
passage of another weak Canadian cold front.


LMZ261-362-364-366-563-565-567-868-210415-
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-
244 PM CST Thu Nov 20 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...West winds 15 to 25 kt becoming northwest 10 to 20 kt.
Slight chance of rain this evening. Waves 3 to 5 ft subsiding to
2 to 4 ft.
.FRIDAY...West winds 10 to 20 kt becoming northwest. Waves 2 to
4 ft.
.FRIDAY NIGHT...North winds 10 to 20 kt becoming northwest 5 to
10 kt. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.SATURDAY...West winds 10 to 15 kt becoming southwest 10 to
20 kt. Waves 1 to 2 ft building to 1 to 3 ft.
.SATURDAY NIGHT...Southwest winds 15 to 25 kt becoming west.
Waves 4 to 6 ft occasionally to 8 ft.
.SUNDAY...West winds 10 to 20 kt. Waves 3 to 5 ft subsiding to
1 to 3 ft.
.SUNDAY NIGHT...West winds 10 to 15 kt becoming southwest 5 to
10 kt. Waves 1 to 2 ft.
.MONDAY...South winds 10 to 20 kt. Waves 1 to 3 ft building to
2 to 4 ft.
.TUESDAY...South winds 10 to 20 kt. Rain likely. Waves 3 to 5 ft.


$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-210415-
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-
244 PM CST Thu Nov 20 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Southwest winds 10 to 20 kt becoming northwest. Slight
chance of drizzle this evening. Waves 2 to 4 ft.
.FRIDAY...Northwest winds 10 to 15 kt becoming north. Slight
chance of drizzle in the afternoon. Waves 2 to 4 ft.
.FRIDAY NIGHT...North winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 2 to 4 ft.
.SATURDAY...North winds 5 to 10 kt backing to southwest 10 to
20 kt in the afternoon. Waves 1 to 3 ft.
.SATURDAY NIGHT...Southwest winds 10 to 20 kt becoming west.
Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.
.SUNDAY...West winds 10 to 20 kt. Waves 4 to 6 ft occasionally to
8 ft subsiding to 3 to 5 ft.
.SUNDAY NIGHT...Southwest winds 5 to 10 kt becoming south 10 to
15 kt. Waves 1 to 3 ft.
.MONDAY...Southeast winds 10 to 20 kt. Waves 2 to 4 ft.
.TUESDAY...South winds 10 to 20 kt becoming southwest. Rain
likely. Waves 4 to 6 ft occasionally to 8 ft.

$$

LMZ761-210415-
MAFOR 2023/
MICHIGAN NORTH 11530 12630 11720 12620 12720. A chance of rain
this evening. Waves 3 to 5 feet subsiding to 2 to 4 feet tonight.
Waves 1 to 3 feet Friday.

MICHIGAN SOUTH 11520 12620 11720 13710 11810. Waves 1 to 3 feet.

$$


Gehring

Experimental modernized open lake forecast is available online at
weather.gov/mkx/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes