767
FZUS63 KMKX 210839
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
239 AM CST Fri Nov 21 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...

Northwesterly winds continue through this evening as low pressure
of 29.5 inches lingers in the Hudson Bay and high pressure of
30.1 inches builds into the northern Plains. High pressure builds
overhead overnight tonight into Saturday, bringing light and
variable winds. Saturday afternoon, expect breezy southwest winds
to develop as weak low pressure of 29.7 inches progresses through
Lake Superior. Winds shift northwesterly Saturday night into
Sunday as this low pressure system exits to the east and a cold
front pushes northwest to southeast across the Lake. High pressure
returns Sunday night into Monday for an additional period of
light and variable winds.

LMZ261-362-364-366-563-565-567-868-211615-
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-
239 AM CST Fri Nov 21 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northwest winds 10 to 20 kt. Waves 2 to 4 ft.
.TONIGHT...Northwest winds 10 to 20 kt diminishing to 5 to 10 kt.
Waves 1 to 3 ft subsiding to 1 to 2 ft.
.SATURDAY...West winds 5 to 10 kt becoming southwest 10 to 15 kt
late in the morning, then increasing to 10 to 20 kt early in the
afternoon increasing to 15 to 25 kt late. Waves 1 to 2 ft
building to 1 to 3 ft.
.SATURDAY NIGHT...Southwest winds 15 to 25 kt becoming northwest.
Waves 4 to 6 ft occasionally to 8 ft.
.SUNDAY...Northwest winds 10 to 20 kt becoming west. Waves 3 to
5 ft subsiding to 1 to 3 ft.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 2 ft.
.MONDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft building to 2 to 4 ft.
.TUESDAY...South winds 10 to 20 kt becoming southwest. Rain
likely. Waves 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-211615-
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-
239 AM CST Fri Nov 21 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Northwest winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 2 to 4 ft.
.TONIGHT...North winds 10 to 15 kt diminishing to 5 to 10 kt.
Waves 2 to 4 ft.
.SATURDAY...Northwest winds 5 to 10 kt backing to southwest 10 to
15 kt late in the morning, then increasing to 10 to 20 kt early
in the afternoon becoming southwest 10 to 20 kt late. Waves 1 to
3 ft.
.SATURDAY NIGHT...Southwest winds 15 to 25 kt becoming west 10 to
20 kt. Waves 4 to 7 ft occasionally to 9 ft.
.SUNDAY...Northwest winds 10 to 20 kt becoming west 10 to 15 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft.
.SUNDAY NIGHT...Southwest winds 5 to 10 kt becoming south 10 to
15 kt. Waves 1 to 3 ft.
.MONDAY...South winds 10 to 20 kt. Chance of rain. Waves 2 to
4 ft.
.TUESDAY...South winds 10 to 20 kt becoming southwest. Rain
likely. Waves 4 to 6 ft occasionally to 8 ft.

$$

LMZ761-211615-
MAFOR 2111/
MICHIGAN NORTH 11720 12620 13720 12710. Waves 1 to 3 feet.

MICHIGAN SOUTH 14710 13810 11800. Waves 1 to 3 feet.

$$


MH

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

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