720
FZUS63 KMKX 080905
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
305 AM CST Mon Dec 8 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...

Lighter winds this morning will pick up out of the south to
southwest this afternoon and continue to increase this evening, as
high pressure of 30.4 inches overhead this morning heads
eastward. Gale force gusts are expected later this evening through
tonight across the north half of the lake.

Low pressure of 29.2 inches will approach from the northern
Plains Tuesday, bringing increased southerly winds across the
south half of the lake by Tuesday night as the low moves through.
Winds will all shift to northwesterly as the low exits into
Wednesday, with gales possible in the southern half throughout
this time frame. Winds gradually diminish Wednesday night,
remaining west to northwest through the end of the week.

LMZ261-362-364-366-563-565-567-868-081630-
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-
305 AM CST Mon Dec 8 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH LATE
TONIGHT...

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

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-081630-
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-
305 AM CST Mon Dec 8 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

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

$$

LMZ761-081630-
MAFOR 0811/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11610 11510 12520 11430
11440 11550 11557. Waves 1 to 3 feet building to 3 to 5 feet
today. Waves 4 to 7 feet building to 9 to 12 feet tonight.

MICHIGAN SOUTH 11210 11310 12420 11430 11440 11540 11547. Waves 1
to 3 feet building to 2 to 4 feet today. Waves 3 to 6 feet
building to 8 to 11 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