770
FZUS63 KMKX 230853
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
253 AM CST Sun Nov 23 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 gusts between 25 and 30 kt will continue across the
open waters through the early morning hours, diminishing into the
morning hours as high pressure around 30.2 inches builds into the
region. Expect southerly winds to increase Monday as low pressure
around 29.8 inches develops in the Middle Mississippi Valley.
Southerly winds will continue into Tuesday as low pressure deepens
to 29.6 inches over Minnesota. Tuesday night, a cold front from
this low will push eastward across the Lake as the low continues
to deepen, bringing westerly gales by Wednesday morning. Westerly
gales will become northwesterly Wednesday night, continuing into
Thursday morning before diminishing as low pressure finally lifts
northward into northern Quebec.


LMZ261-362-364-366-563-565-567-868-231615-
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-
253 AM CST Sun Nov 23 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northwest winds to 30 kt becoming west 10 to 20 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.TONIGHT...West winds 10 to 15 kt becoming southwest 10 to 20 kt.
Waves 1 to 3 ft building to 2 to 4 ft.
.MONDAY...Southwest winds 15 to 25 kt. Waves 3 to 5 ft building
to 4 to 7 ft occasionally to 9 ft.
.MONDAY NIGHT...Southwest winds 10 to 20 kt becoming south 10 to
15 kt. Rain likely. Waves 4 to 7 ft occasionally to 9 ft
subsiding to 3 to 5 ft.
.TUESDAY...South winds 10 to 15 kt. Rain likely. Waves 2 to 4 ft.
.TUESDAY NIGHT...South winds 10 to 20 kt becoming southwest gales
to 35 kt. Rain. Waves 2 to 4 ft building to 5 to 8 ft
occasionally to 10 ft.
.WEDNESDAY...West gales to 40 kt becoming northwest gales to
45 kt. Snow likely. Waves 8 to 11 ft occasionally to 14 ft.
.THURSDAY...Northwest gales to 35 kt. Chance of snow. Waves 7 to
10 ft occasionally to 13 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-231615-
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-
253 AM CST Sun Nov 23 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Northwest winds 15 to 25 kt diminishing to 10 to 20 kt
late this morning, then becoming west early this afternoon
diminishing to 10 to 15 kt late. Waves 4 to 7 ft occasionally to
9 ft subsiding to 2 to 4 ft.
.TONIGHT...Southwest winds 5 to 10 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.MONDAY...Southwest winds 10 to 20 kt becoming south 15 to 25 kt.
Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.
.MONDAY NIGHT...South winds 10 to 20 kt. Rain likely in the
evening, then rain overnight. Waves 4 to 6 ft occasionally to
8 ft subsiding to 3 to 5 ft.
.TUESDAY...South winds 10 to 15 kt becoming southwest. Chance of
rain. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.TUESDAY NIGHT...Southwest winds 15 to 25 kt becoming west gales
to 35 kt. Chance of rain. Waves 2 to 4 ft building to 6 to 9 ft
occasionally to 12 ft.
.WEDNESDAY...West gales to 45 kt. Chance of rain and snow. Waves
10 to 14 ft occasionally to 18 ft.
.THURSDAY...Northwest gales to 35 kt. Chance of snow. Waves 8 to
11 ft occasionally to 14 ft.

$$

LMZ761-231615-
MAFOR 2311/
MICHIGAN NORTH 12740 11730 11630 11610 11510 12520. Waves 3 to 6
feet subsiding to 1 to 3 feet today. Waves 1 to 3 feet tonight.

MICHIGAN SOUTH 11730 11720 11620 11610 11600 12510 11520. Waves 4
to 7 feet subsiding to 2 to 4 feet today. Waves 1 to 3 feet
tonight.

$$


MH

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

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