497
FZUS63 KMKX 070304
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
904 PM CST Sat Dec 6 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...

Winds will increase and become north to northwest overnight into
Sunday, as low pressure around 29.9 inches crosses central
Illinois and Indiana. High pressure around 30.5 inches will also
build into the Upper Midwest.

Winds will shift to the south Monday afternoon, as low pressure
around 30.0 inches passes north of Lake Superior. Another 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.

LMZ261-362-364-366-563-565-567-868-071030-
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-
904 PM CST Sat Dec 6 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Northwest winds 10 to 15 kt. Slight chance of
snow through early evening, then chance of snow overnight. Waves
1 to 3 ft.
.SUNDAY...Northwest winds 10 to 20 kt becoming north 15 to 25 kt.
Slight chance of snow. Waves 2 to 4 ft building to 4 to 7 ft
occasionally to 9 ft.
.SUNDAY NIGHT...North winds 15 to 25 kt becoming northwest 5 to
10 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to
4 ft.
.MONDAY...South winds 10 to 20 kt increasing to 30 kt in the
afternoon. Chance of snow in the afternoon. Waves 1 to 3 ft
building to 4 to 7 ft occasionally to 9 ft.
.MONDAY NIGHT...Southwest gales to 35 kt. Chance of snow in the
evening, then snow overnight. Waves 10 to 14 ft occasionally to
18 ft.
.TUESDAY...West winds to 30 kt diminishing to 15 to 25 kt. Snow
showers likely in the morning, then chance of rain showers in the
afternoon. Waves 10 to 14 ft occasionally to 18 ft subsiding to
7 to 10 ft occasionally to 13 ft.
.TUESDAY NIGHT...South winds 15 to 25 kt becoming east to 30 kt.
Snow and rain. Waves 5 to 8 ft occasionally to 10 ft building to
7 to 10 ft occasionally to 13 ft.
.WEDNESDAY...North winds to 30 kt. Chance of snow showers. Waves
8 to 11 ft occasionally to 14 ft.
.THURSDAY...North winds 10 to 20 kt. Chance of snow. Waves 3 to
5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-071030-
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-
904 PM CST Sat Dec 6 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northwest winds 5 to 10 kt veering to
northeast late this evening, then becoming east after midnight
becoming northeast 10 to 20 kt late. Chance of snow through early
evening, then snow overnight. Waves 1 to 3 ft.
.SUNDAY...Northeast winds 10 to 20 kt becoming north 15 to 25 kt.
Chance of snow in the morning, then slight chance of snow in the
afternoon. Waves 3 to 5 ft building to 5 to 8 ft occasionally to
10 ft.
.SUNDAY NIGHT...North winds 15 to 25 kt becoming northeast 10 to
20 kt, then becoming east 10 to 15 kt late. Chance of snow in the
evening. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.MONDAY...Southeast 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 gales to 35 kt becoming southwest. Chance
of snow overnight. Waves 8 to 12 ft occasionally to 16 ft
building to 12 to 16 ft occasionally to 21 ft.
.TUESDAY...Southwest gales to 35 kt diminishing to 30 kt. Chance
of snow showers in the morning, then chance of rain showers in
the afternoon. Waves 10 to 14 ft occasionally to 18 ft subsiding
to 8 to 12 ft occasionally to 16 ft.
.TUESDAY NIGHT...South winds to 30 kt becoming southwest gales to
35 kt. Rain. Waves 7 to 10 ft occasionally to 13 ft building to
10 to 14 ft occasionally to 18 ft.
.WEDNESDAY...West gales to 40 kt becoming northwest. Rain showers
likely with a chance of snow showers. Waves 12 to 16 ft
occasionally to 21 ft.
.THURSDAY...Northwest winds 15 to 25 kt. Chance of snow. Waves
5 to 8 ft occasionally to 10 ft.

$$

LMZ761-071030-
MAFOR 0705/
MICHIGAN NORTH 11710 11717 12720 11730 13830. Waves 2 feet or
less overnight. Waves 2 to 4 feet building to 3 to 6 feet Sunday.
Waves 3 to 6 feet Sunday evening.

MICHIGAN SOUTH 11207 11117 11127 14830 11120. Waves 2 feet or
less overnight. Waves 2 to 4 feet building to 5 to 8 feet Sunday.
Waves 5 to 8 feet Sunday evening.

$$
Wood

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

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