770
FZUS63 KMKX 070833
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
233 AM CST Sun Dec 7 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...

Breezy northerly winds are expected today between weakening low
pressure passing by well to the south and high pressure around
30.5 inches building in from the west. Winds will become lighter
tonight under the high.

Winds will then shift to the south by Monday afternoon, as the
high heads eastward ahead of an approaching low. The low around
29.7 inches will track from Minnesota to Sault Ste. Marie Monday
night through Tuesday morning. A period of southerly gales up to
35 knots is looking more likely during this time, with gusts up to
40 knots possible over far northern Lake Michigan.

The next low around 29.1 inches will track across central
Wisconsin Tuesday night and reach southern Ontario by midday
Wednesday. Gales are possible for the south half of the lake
during this time.

LMZ261-362-364-366-563-565-567-868-071630-
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-
233 AM CST Sun Dec 7 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northwest winds 10 to 20 kt becoming north 15 to 25 kt.
Slight chance of snow this morning. Waves 2 to 4 ft building to
4 to 6 ft occasionally to 8 ft.
.TONIGHT...North winds 10 to 20 kt diminishing to 5 to 10 kt
after midnight, then backing to west late. Chance of snow
overnight. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.MONDAY...Southwest winds 10 to 15 kt becoming south to 30 kt.
Chance of snow in the afternoon. Waves 1 to 2 ft building to 4 to
7 ft occasionally to 9 ft.
.MONDAY NIGHT...Southwest gales to 45 kt. Chance of snow in the
evening, then snow overnight. Waves 12 to 16 ft occasionally to
21 ft.
.TUESDAY...West gales to 35 kt diminishing to 30 kt. Snow likely
in the morning, then chance of snow and rain in the afternoon.
Waves 10 to 14 ft occasionally to 18 ft subsiding to 6 to 9 ft
occasionally to 12 ft.
.TUESDAY NIGHT...South winds 15 to 25 kt backing to east to
30 kt. Snow and rain. Waves 6 to 9 ft occasionally to 12 ft
building to 8 to 12 ft occasionally to 16 ft.
.WEDNESDAY...North winds to 30 kt. Chance of snow and rain
likely. Waves 8 to 11 ft occasionally to 14 ft subsiding to 7 to
10 ft occasionally to 13 ft.
.THURSDAY...Northwest winds 10 to 20 kt. Chance of snow. Waves
2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-071630-
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-
233 AM CST Sun Dec 7 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of snow. Waves 2 to 4 ft building to 5 to 8 ft
occasionally to 10 ft.
.TONIGHT...Northeast winds 10 to 20 kt becoming east 10 to 15 kt.
Chance of snow. Waves 4 to 7 ft occasionally to 9 ft subsiding to
3 to 5 ft.
.MONDAY...Southeast winds 10 to 15 kt increasing to 10 to 20 kt
late in the morning, then becoming south early in the afternoon
increasing to 15 to 25 kt late. Waves 2 to 4 ft building to 4 to
7 ft occasionally to 9 ft.
.MONDAY NIGHT...South gales to 35 kt becoming southwest gales to
40 kt. Chance of snow in the evening, then snow likely overnight.
Waves 8 to 12 ft occasionally to 16 ft building to 12 to 16 ft
occasionally to 21 ft.
.TUESDAY...Southwest gales to 40 kt diminishing to 30 kt in the
afternoon. Chance of snow in the morning, then chance of rain in
the afternoon. Waves 12 to 16 ft occasionally to 21 ft subsiding
to 8 to 12 ft occasionally to 16 ft.
.TUESDAY NIGHT...Southwest gales to 35 kt increasing to gales to
40 kt. Rain. Waves 8 to 11 ft occasionally to 14 ft building to
10 to 14 ft occasionally to 18 ft.
.WEDNESDAY...Northwest gales to 40 kt. Chance of rain and snow.
Waves 12 to 16 ft occasionally to 21 ft.
.THURSDAY...Northwest winds 10 to 20 kt. Chance of snow. Waves
4 to 6 ft occasionally to 8 ft.

$$

LMZ761-071630-
MAFOR 0711/
MICHIGAN NORTH 12720 11730 11830 12820 11810 11700. A chance of
snow early this morning and overnight. Waves 1 to 3 feet building
to 3 to 5 feet today. Waves 3 to 5 feet subsiding to 1 to 3 feet
tonight.

MICHIGAN SOUTH 11827 11820 12830 11820 12120 11210. Waves 2 feet
or less building to 4 to 7 feet today. Waves 4 to 7 feet
subsiding to 2 to 4 feet tonight.

$$


DDV

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

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