389
FZUS63 KMKX 280201
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
901 PM CDT Sat Sep 27 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 cold front will continue southward across southern Lake
Michigan into tonight, resulting in a northerly wind shift over
the waters near/after midnight. Currently positioned over the
northern Great Plains, high pressure of 30.1 inches will cross
Lake Michigan Sunday morning, with winds becoming light and
variable by the afternoon hours. East- northeast winds will become
established Monday night through Tuesday as high pressure of 30.4
inches builds over the Hudson Bay. Winds will become breezy out
of the east Wednesday, then out of the south-southeast Thursday
through Friday as low pressure of 29.6 inches develops over the
northern Great Plains.

LMZ261-362-364-366-563-565-567-868-280930-
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-
901 PM CDT Sat Sep 27 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Northwest winds 10 to 20 kt diminishing to
10 to 15 kt. Waves 1 to 3 ft.
.SUNDAY...Northwest winds 5 to 10 kt backing to southwest 10 to
15 kt. Waves 1 to 2 ft.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 ft or less.
.MONDAY...Southwest winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 ft or less.
.MONDAY NIGHT...South winds 5 to 10 kt becoming east. Waves
nearly calm.
.TUESDAY...East winds 10 to 15 kt becoming northeast 10 to 20 kt.
Waves 1 to 3 ft.
.TUESDAY NIGHT...East winds 10 to 20 kt. Waves 1 to 3 ft.
.WEDNESDAY...East winds 10 to 20 kt. Waves 1 to 3 ft.
.THURSDAY...South winds 10 to 20 kt. Waves 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-280930-
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-
901 PM CDT Sat Sep 27 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Southwest winds 10 to 15 kt veering to north
10 to 20 kt. Waves 2 to 4 ft.
.SUNDAY...Northeast winds 10 to 15 kt becoming north. Waves 1 to
3 ft.
.SUNDAY NIGHT...Northeast winds 5 to 10 kt veering to southeast.
Waves 1 to 2 ft.
.MONDAY...South winds 5 to 10 kt becoming southeast. Waves 1 ft
or less.
.MONDAY NIGHT...East winds 5 to 10 kt. Waves 1 ft or less.
.TUESDAY...East winds 5 to 10 kt becoming northeast 10 to 15 kt.
Waves 1 ft or less.
.TUESDAY NIGHT...Northeast winds 10 to 20 kt becoming east. Waves
1 to 3 ft building to 3 to 5 ft.
.WEDNESDAY...East winds 10 to 20 kt becoming northeast 10 to
15 kt. Waves 3 to 5 ft.
.THURSDAY...Southeast winds 10 to 20 kt. Waves 3 to 5 ft
subsiding to 2 to 4 ft.

$$

LMZ761-280930-
MAFOR 2804/
MICHIGAN NORTH 11820 11710 11700 11600 11610 12510 11400. Waves 1
to 3 feet overnight. Waves 2 feet or less Sunday and Sunday
evening.

MICHIGAN SOUTH 11720 11820 12110 11100 11800 12100. Waves 1 to 3
feet overnight and Sunday. Waves 2 feet or less Sunday evening.

$$


Sheppard

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

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