344
FZUS63 KMKX 310909
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
309 AM CST Wed Dec 31 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 prevail across the Lake today as strong low
pressure around 28.2 inches meanders back into the Hudson Bay
region. Extending off of this low is a secondary cold front that
is expected to slide down across the Lake through the day with
increasing northwesterly gusts behind it into this evening.
Cannot rule out seeing a few gales across the far northern
portions of Lake Michigan this evening, but this window looks
brief. Thus have held off on any gale headlines at this time.
However, with the colder airmass and gusty winds behind the cold
front, moderate freezing spray will be a concern overnight into
New Years Day. Then winds slowly lessen through Thursday as high
pressure around 30.3 inches builds down across the Upper Midwest
Thursday through the weekend.

LMZ261-362-364-366-563-565-567-868-311630-
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-
309 AM CST Wed Dec 31 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northwest winds 15 to 25 kt increasing to 30 kt. Chance
of snow. Freezing spray this afternoon. Waves 3 to 5 ft building
to 7 to 10 ft occasionally to 13 ft.
.TONIGHT...Northwest winds to 30 kt. Freezing spray. Chance of
snow and slight chance of light freezing rain in the evening,
then slight chance of light freezing rain and snow overnight.
Waves 8 to 11 ft occasionally to 14 ft subsiding to 7 to 10 ft
occasionally to 13 ft.
.THURSDAY...Northwest winds to 30 kt becoming west. Freezing
spray in the morning. Chance of light freezing rain in the
afternoon. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.THURSDAY NIGHT...West winds to 30 kt. Waves 4 to 6 ft
occasionally to 8 ft.
.FRIDAY...Northwest winds 15 to 25 kt. Waves 4 to 6 ft
occasionally to 8 ft.
.FRIDAY NIGHT...Northwest winds 15 to 25 kt. Waves 3 to 5 ft.
.SATURDAY...Northwest winds 10 to 20 kt becoming west. Waves 2 to
4 ft.
.SUNDAY...Northwest winds 10 to 15 kt becoming west. Waves 1 to
3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-311630-
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-
309 AM CST Wed Dec 31 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Northwest winds 15 to 25 kt increasing to 30 kt. Slight
chance of light freezing rain and snow this morning, then chance
of snow and rain likely this afternoon. Waves 4 to 7 ft
occasionally to 9 ft building to 8 to 11 ft occasionally to
14 ft.
.TONIGHT...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Freezing spray. Chance of snow and light freezing rain in the
evening, then slight chance of light freezing rain and snow
overnight. Waves 8 to 12 ft occasionally to 16 ft subsiding to
7 to 10 ft occasionally to 13 ft.
.THURSDAY...Northwest winds 15 to 25 kt becoming west 10 to
20 kt. Freezing spray in the morning. Waves 6 to 9 ft
occasionally to 12 ft subsiding to 4 to 6 ft occasionally to
8 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt increasing to 15 to
25 kt. Waves 4 to 7 ft occasionally to 9 ft.
.FRIDAY...Northwest winds 10 to 20 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.FRIDAY NIGHT...Northwest winds 10 to 20 kt. Waves 4 to 6 ft
occasionally to 8 ft.
.SATURDAY...Northwest winds 10 to 15 kt. Waves 2 to 4 ft.
.SUNDAY...West winds 10 to 15 kt becoming southwest. Waves 2 to
4 ft.

$$

LMZ761-311630-
MAFOR 3111/
MICHIGAN NORTH 11730 15740 11740. A chance of snow today and this
evening. Waves 2 to 4 feet building to 7 to 10 feet today. Waves
6 to 10 feet subsiding to 5 to 8 feet tonight.

MICHIGAN SOUTH 11730 11740 11746 11747 13740 11730. A chance of
light freezing rain this evening. Waves 3 to 6 feet building to 8
to 11 feet today. Waves 8 to 12 feet subsiding to 6 to 9 feet
tonight.

$$


Wagner

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

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