321
FZUS63 KMKX 211501
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
901 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...

Light to modest northwest winds continue today through this
evening as low pressure of 29.5 inches lingers in the Hudson Bay
area, and high pressure of 30.1 inches builds into the northern
Great 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 moves southeast
across the lake. High pressure returns Sunday night into Monday
for an additional period of light and variable winds.

LMZ261-362-364-366-563-565-567-868-212230-
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-
901 AM CST Fri Nov 21 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...West winds 10 to 20 kt becoming northwest. Waves
2 to 4 ft.
.TONIGHT...Northwest winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 2 to 4 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 2 to 4 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 2 to
4 ft subsiding to 1 to 3 ft.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 3 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.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-212230-
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-
901 AM CST Fri Nov 21 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Northwest winds 10 to 15 kt. Waves 1 to 3 ft.
.TONIGHT...North winds 10 to 15 kt diminishing to 5 to 10 kt.
Waves 1 to 3 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 building to 2 to 4 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 2 to 4 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 building to 3 to 5 ft.
.TUESDAY...South winds 10 to 20 kt becoming southwest. Rain
likely. Waves 3 to 5 ft.

$$

LMZ761-212230-
MAFOR 2117/
MICHIGAN NORTH 11620 12720 11820 11810 11710 11700 11500. Waves 1
to 3 feet subsiding to 1 foot or less this afternoon and tonight.
Waves 1 foot or less Saturday morning.

MICHIGAN SOUTH 12710 13810 12800 11500. Waves 1 to 3 feet this
afternoon. Waves 2 feet or less tonight and Saturday morning.

$$


Gehring

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

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