657
FZUS63 KMKX 220241
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
841 PM CST Fri Nov 21 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...

Light to modest northwest winds will continue through tonight as
low pressure of 29.5 inches lingers in the Hudson Bay area, and
high pressure of 30.1 inches builds into Wisconsin. High pressure
builds overhead Saturday morning, bringing light and variable
winds. For Saturday afternoon, expect breezy southwest winds to
develop as weak low pressure of 29.7 inches progresses through
Lake Superior. Winds shift northwesterly Saturday night into
Sunday with the passage of a cold front. High pressure briefly
returns Sunday night, followed by modest south winds developing
Monday and Monday night, as low pressure moves into the Upper
Mississippi River Valley.

LMZ261-362-364-366-563-565-567-868-221015-
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-
841 PM CST Fri Nov 21 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...North winds 10 to 20 kt becoming northwest
10 to 15 kt. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.SATURDAY...West winds 5 to 10 kt becoming southwest 10 to 15 kt
late in the morning, then increasing to 10 to 20 kt early in the
afternoon increasing to 30 kt late. Slight chance of rain showers
in the afternoon. Waves 1 to 2 ft building to 3 to 5 ft.
.SATURDAY NIGHT...Southwest winds to 30 kt becoming northwest.
Waves 4 to 7 ft occasionally to 9 ft.
.SUNDAY...Northwest winds to 30 kt becoming west 10 to 20 kt in
the afternoon. Waves 4 to 6 ft occasionally to 8 ft subsiding to
2 to 4 ft.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt. Waves 1 to 3 ft.
.MONDAY...South winds 10 to 20 kt. Waves 2 to 4 ft building to
3 to 5 ft.
.MONDAY NIGHT...South winds 10 to 20 kt. Rain showers likely.
Waves 4 to 6 ft occasionally to 8 ft.
.TUESDAY...South winds 10 to 20 kt becoming southwest. Rain
showers likely. Waves 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...West winds to 30 kt increasing to gales to 35 kt.
Chance of snow and rain showers. Waves 7 to 10 ft occasionally to
13 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-221015-
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-
841 PM CST Fri Nov 21 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...North winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 3 ft.
.SATURDAY...Northwest winds 5 to 10 kt backing to southwest 10 to
15 kt late in the morning, then increasing to 10 to 20 kt early
in the afternoon increasing to 15 to 25 kt late. Waves 1 to 3 ft
building to 3 to 5 ft.
.SATURDAY NIGHT...Southwest winds 15 to 25 kt becoming northwest.
Waves 4 to 6 ft occasionally to 8 ft building to 4 to 7 ft
occasionally to 9 ft.
.SUNDAY...Northwest winds 15 to 25 kt becoming west 10 to 15 kt
in the afternoon. Waves 4 to 7 ft occasionally to 9 ft subsiding
to 3 to 5 ft.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt becoming south. Waves
1 to 3 ft.
.MONDAY...South winds 10 to 20 kt. Waves 4 to 6 ft occasionally
to 8 ft.
.MONDAY NIGHT...South winds 10 to 20 kt. Showers. Waves 4 to 6 ft
occasionally to 8 ft.
.TUESDAY...South winds 10 to 20 kt becoming southwest. Showers
likely. Waves 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...West gales to 35 kt. Waves 8 to 12 ft occasionally
to 16 ft.

$$

LMZ761-221015-
MAFOR 2205/
MICHIGAN NORTH 11810 11710 11700 11500 11520 12530 11630. Waves 2
feet or less overnight. Waves 2 feet or less building to 3 to 5
feet Saturday. Waves 3 to 6 feet Saturday evening.

MICHIGAN SOUTH 11810 12800 11500 12520 11530 11630. Waves 2 feet
or less overnight. Waves 2 feet or less building to 2 to 4 feet
Saturday. Waves 3 to 6 feet Saturday evening.

$$


Quigley

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

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