178
FZUS63 KMKX 080753
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
253 AM CDT Mon Sep 8 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...

High pressure around 30.3 inches will continue to move east of
the region today into Tuesday. Increasing south winds during this
period are expected, with the highest winds across the northern
half of the lake. Much lighter winds are then expected Tuesday
night and Wednesday, followed by a weak cold frontal passage from
the north Wednesday night. Light northeast winds will prevail on
Thursday after the frontal passage, becoming east to southeast for
Friday.

LMZ261-362-364-366-563-565-567-868-081515-
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-
253 AM CDT Mon Sep 8 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Southwest winds 10 to 15 kt becoming south 15 to 25 kt.
Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.TONIGHT...South winds to 30 kt. Slight chance of showers
overnight. Waves 5 to 8 ft occasionally to 10 ft.
.TUESDAY...South winds to 30 kt. Waves 5 to 8 ft occasionally to
10 ft subsiding to 4 to 7 ft occasionally to 9 ft.
.TUESDAY NIGHT...South winds 15 to 25 kt becoming southwest 10 to
20 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft.
.WEDNESDAY...Southwest winds 10 to 15 kt. Waves 1 to 3 ft.
.WEDNESDAY NIGHT...Northeast winds 5 to 10 kt increasing to 10 to
15 kt. Waves 1 to 2 ft.
.THURSDAY...Northeast winds 10 to 15 kt. Waves 1 to 2 ft.
.FRIDAY...Southeast winds 10 to 15 kt becoming south. Waves 1 to
2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-081515-
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-
253 AM CDT Mon Sep 8 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Southwest winds 10 to 15 kt becoming south 10 to 20 kt.
Waves 1 to 3 ft building to 3 to 5 ft.
.TONIGHT...South winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.TUESDAY...South winds 15 to 25 kt. Waves 4 to 6 ft occasionally
to 8 ft.
.TUESDAY NIGHT...South winds 10 to 20 kt. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft.
.WEDNESDAY...South winds 10 to 15 kt. Waves 1 to 3 ft.
.WEDNESDAY NIGHT...East winds 5 to 10 kt becoming northeast.
Waves 1 to 2 ft.
.THURSDAY...Northeast winds 5 to 10 kt becoming north 10 to
15 kt. Waves 1 to 2 ft.
.FRIDAY...Southeast winds 10 to 15 kt. Waves 1 to 3 ft.

$$

LMZ761-081515-
MAFOR 0810/
MICHIGAN NORTH 11510 12520 11530 11430 13440. Waves 1 to 3 feet
building to 3 to 5 feet today. Waves 3 to 6 feet building to 4 to
7 feet tonight.

MICHIGAN SOUTH 11500 11510 14420 12430. Waves 1 to 3 feet
building to 2 to 4 feet today. Waves 2 to 4 feet building to 3 to
5 feet tonight.

$$
Wood

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

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