371
FZUS63 KMKX 121450
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
850 AM CST Wed Nov 12 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...

Brisk northwest winds will continue today into this evening as
low pressure around 29.4 inches tracks across Ontario. The low
will weaken tonight with lessening winds over the lake into
Thursday. A surface ridge around 30.1 inches will then move east
across the lake Thursday night with lessening winds becoming
variable. Modest southeast winds will then develop for Friday as
another strong low begins to move east across southern Canada.
Breezy southerly winds will develop Friday night into Saturday as
the Canadian low continues eastward. Its strong cold frontal
passage will then shift winds to brisk northwesterly for
Saturday night into Sunday over the lake.

LMZ261-362-364-366-563-565-567-868-122215-
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-
850 AM CST Wed Nov 12 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Northwest winds to 30 kt. Chance of rain. Waves
6 to 9 ft occasionally to 12 ft.
.TONIGHT...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Chance of rain in the evening. Waves 5 to 8 ft occasionally to
10 ft subsiding to 4 to 7 ft occasionally to 9 ft.
.THURSDAY...Northwest winds 15 to 25 kt becoming west. Waves 3 to
5 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt becoming northwest 10 to
15 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.FRIDAY...East winds 10 to 15 kt becoming southeast 10 to 20 kt.
Waves 1 to 2 ft building to 1 to 3 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt increasing to 15 to
25 kt. Waves 3 to 5 ft building to 4 to 7 ft occasionally to
9 ft.
.SATURDAY...South winds 15 to 25 kt becoming southwest. Chance of
rain. Waves 5 to 8 ft occasionally to 10 ft.
.SUNDAY...Northwest winds to 30 kt. Chance of snow. Waves 5 to
8 ft occasionally to 10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-122215-
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-
850 AM CST Wed Nov 12 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Northwest winds to 30 kt becoming west. Slight
chance of rain through mid morning. Waves 8 to 11 ft occasionally
to 14 ft.
.TONIGHT...West winds to 30 kt becoming northwest 15 to 25 kt.
Waves 7 to 10 ft occasionally to 13 ft subsiding to 6 to 9 ft
occasionally to 12 ft.
.THURSDAY...Northwest winds 10 to 20 kt becoming southwest. Waves
4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.
.THURSDAY NIGHT...Southwest winds 10 to 20 kt diminishing to 5 to
10 kt overnight. Waves 2 to 4 ft.
.FRIDAY...Southeast winds 10 to 15 kt. Waves 1 to 3 ft.
.FRIDAY NIGHT...Southeast winds 10 to 20 kt becoming south 15 to
25 kt. Waves 3 to 5 ft building to 4 to 7 ft occasionally to
9 ft.
.SATURDAY...South winds 15 to 25 kt becoming southwest. Chance of
rain. Waves 5 to 8 ft occasionally to 10 ft.
.SUNDAY...Northwest winds to 30 kt. Waves 7 to 10 ft occasionally
to 13 ft.

$$

LMZ761-122215-
MAFOR 1217/
MICHIGAN NORTH 12746 13740 12730 11630. Waves 5 to 8 feet this
afternoon. Waves 4 to 7 feet subsiding to 3 to 6 feet tonight.
Waves 3 to 5 feet subsiding to 2 to 4 feet Thursday morning.

MICHIGAN SOUTH 11740 12640 12740 11730 11720 11620. Waves 7 to 11
feet this afternoon. Waves 6 to 10 feet subsiding to 5 to 8 feet
tonight. Waves 4 to 7 feet subsiding to 3 to 6 feet Thursday
morning.

$$


Kuroski

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

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