195
FZUS63 KMKX 110752
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
252 AM CDT Sat Oct 11 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...

Low pressure of 30.0 inches over eastern Ontario will weaken
today, but a weak surface trough extending back from it will
slide down Lake Michigan later this morning and bring a wind shift
to the north-northeast. High pressure around 30.3 inches will
cross the Upper Great Lakes tonight. Modest southeast winds will
then prevail from late tonight through Sunday night, and become
southerly on Monday. This will occur as strong high pressure
prevails over southeast Canada and low pressure tracks from the
northern high plains into Manitoba.

LMZ261-362-364-366-563-565-567-868-111530-
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-
252 AM CDT Sat Oct 11 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...North winds 10 to 20 kt becoming northeast 10 to 15 kt.
Waves 3 to 5 ft subsiding to 2 to 4 ft.
.TONIGHT...East winds 10 to 15 kt becoming southeast 10 to 20 kt.
Waves 2 to 4 ft.
.SUNDAY...Southeast winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 3 to 5 ft.
.SUNDAY NIGHT...Southeast winds 15 to 25 kt. Waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft.
.MONDAY...South winds 10 to 20 kt. Chance of showers. Waves 4 to
6 ft occasionally to 8 ft subsiding to 3 to 5 ft.
.MONDAY NIGHT...West winds 10 to 15 kt veering to north 10 to
20 kt. Waves 3 to 5 ft.
.TUESDAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 4 to 6 ft occasionally to 8 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.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-111530-
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-
252 AM CDT Sat Oct 11 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

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

$$

LMZ761-111530-
MAFOR 1110/
MICHIGAN NORTH 11820 12120 12110 11220 12320. Waves 3 to 5 feet
subsiding to 1 to 3 feet today. Waves 1 to 3 feet building to 2
to 4 feet tonight.

MICHIGAN SOUTH 12820 13110 12220 11320. Waves 3 to 5 feet
subsiding to 2 to 4 feet today. Waves 1 to 3 feet building to 2
to 4 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