783
FZUS63 KMKX 170858
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
258 AM CST Mon Nov 17 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...

Light northwest wings will continue through today as high
pressure around 30.1 inch moves through the Upper Midwest. As the
high exits, low pressure around 29.8 inches progresses from the
central Plains through Illinois Monday night through Tuesday.
Southeast to east winds will develop across the lake as the low
moves in. The strongest winds are expected over the southern half
of the open waters. Light and variable winds are then expected
midweek as high pressure builds back into the Great Lakes region.

LMZ261-362-364-366-563-565-567-868-171615-
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-
258 AM CST Mon Nov 17 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northwest winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 3 to 5 ft subsiding to 2 to 4 ft.
.TONIGHT...Northwest winds 10 to 20 kt becoming north 10 to
15 kt, then becoming northeast late. Waves 1 to 3 ft subsiding to
1 to 2 ft.
.TUESDAY...Northeast winds 10 to 15 kt. Chance of rain in the
morning. Waves 1 to 3 ft.
.TUESDAY NIGHT...Northeast winds 5 to 10 kt. Waves 1 to 3 ft.
.WEDNESDAY...South winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 2 ft.
.WEDNESDAY NIGHT...South winds 10 to 15 kt becoming southwest.
Waves 1 ft or less.
.THURSDAY...South winds 10 to 20 kt. Waves 1 to 2 ft building to
1 to 3 ft.
.FRIDAY...Northwest winds 15 to 25 kt becoming north. Waves 4 to
6 ft occasionally to 8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-171615-
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-
258 AM CST Mon Nov 17 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Northwest winds 10 to 20 kt becoming north 10 to 15 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.TONIGHT...Northeast winds 5 to 10 kt becoming east late in the
evening, then becoming southeast after midnight becoming 10 to
20 kt late. Chance of rain overnight. Waves 1 to 3 ft.
.TUESDAY...Southeast winds 10 to 20 kt becoming east. Rain in the
morning, then rain likely in the afternoon. Waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft.
.TUESDAY NIGHT...East winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.WEDNESDAY...East winds 10 to 15 kt becoming southeast 5 to
10 kt. Waves 2 to 4 ft.
.WEDNESDAY NIGHT...South winds 5 to 10 kt becoming southwest.
Waves 1 to 2 ft.
.THURSDAY...South winds 10 to 20 kt. Waves 1 to 2 ft building to
2 to 4 ft.
.FRIDAY...North winds 15 to 25 kt. Chance of rain. Waves 6 to
9 ft occasionally to 12 ft.

$$

LMZ761-171615-
MAFOR 1711/
MICHIGAN NORTH 12730 13720 11710 12810. A chance of snow early
this morning. Waves 3 to 5 feet subsiding to 1 to 3 feet today.
Waves 2 feet or less tonight.

MICHIGAN SOUTH 11720 13710 11800 11200 11300 11316. Waves 3 to 6
feet subsiding to 1 to 3 feet today. Waves 2 feet or less
tonight.

$$


Patterson

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

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