103
FZUS63 KMKX 120801
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
301 AM CDT Sun Oct 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...

High pressure around 30.4 inches over eastern Canada will remain
in place today, while a low pressure trough around 29.3 inches
crosses North Dakota. Between these systems, breezy southerly
winds are expected today through Monday afternoon. Winds will
shift to the west Monday afternoon behind the associated cold
front. High pressure around 30.4 inches will then move across the
Upper Great Lakes region Tuesday through Wednesday.

LMZ261-362-364-366-563-565-567-868-121530-
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-
301 AM CDT Sun Oct 12 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Southeast winds 10 to 20 kt becoming south 15 to 25 kt.
Waves 3 to 5 ft.
.TONIGHT...Southeast winds 15 to 25 kt becoming south. Waves 3 to
5 ft building to 4 to 7 ft occasionally to 9 ft.
.MONDAY...South winds 10 to 20 kt becoming southwest 10 to 15 kt.
Chance of showers in the afternoon. Waves 4 to 7 ft occasionally
to 9 ft subsiding to 3 to 5 ft.
.MONDAY NIGHT...West winds 10 to 15 kt becoming north 10 to
20 kt. Waves 2 to 4 ft building to 3 to 5 ft.
.TUESDAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 3 to 5 ft.
.TUESDAY NIGHT...North winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 3 to 5 ft.
.WEDNESDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 2 to 4 ft subsiding to 1 to 3 ft.
.THURSDAY...East winds 5 to 10 kt veering to south 10 to 20 kt.
Waves 1 to 2 ft building to 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-121530-
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-
301 AM CDT Sun Oct 12 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Southeast winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 3 to 5 ft.
.TONIGHT...Southeast winds 15 to 25 kt becoming south. Waves 3 to
5 ft building to 4 to 7 ft occasionally to 9 ft.
.MONDAY...South winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.
.MONDAY NIGHT...Northwest winds 5 to 10 kt becoming north 10 to
20 kt overnight. Waves 1 to 3 ft building to 3 to 5 ft.
.TUESDAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 5 to 8 ft occasionally to 10 ft.
.TUESDAY NIGHT...North winds 15 to 25 kt becoming northeast 10 to
20 kt. Waves 5 to 8 ft occasionally to 10 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.
.THURSDAY...Southeast winds 10 to 15 kt. Waves 2 to 4 ft.

$$

LMZ761-121530-
MAFOR 1210/
MICHIGAN NORTH 12320 11330 11430 13330 11430. Waves 2 to 4 feet
building to 3 to 5 feet today and 4 to 6 feet tonight.

MICHIGAN SOUTH 12320 13330 11320 11330 11430. Waves 2 to 4 feet
building to 3 to 5 feet today and 4 to 6 feet tonight.

$$


Cronce

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

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