190
FZUS63 KMKX 122054
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
354 PM CDT Sun Oct 12 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...

Strong high pressure around 30.5 inches over Maine will linger
tonight into Monday, with low pressure around 29.3 inches moving
from southern Manitoba to northwest Ontario. Breezy southeasterly
winds will linger over Lake Michigan into tonight. Winds will
remain breezy and become more southerly Monday morning.

Winds will then ease late Monday afternoon into Monday evening,
as a cold front passes, with winds becoming northerly and breezy
behind the cold front Tuesday morning into Wednesday. High
pressure around 30.3 inches then settles over the region later
Wednesday into Thursday.

LMZ261-362-364-366-563-565-567-868-130315-
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-
354 PM CDT Sun Oct 12 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Southeast winds 10 to 20 kt becoming south to 30 kt,
then diminishing to 15 to 25 kt late. Waves 3 to 5 ft.
.MONDAY...South winds 15 to 25 kt becoming southwest 10 to 20 kt.
Slight chance of showers. Waves 3 to 5 ft.
.MONDAY NIGHT...West winds 5 to 10 kt becoming northwest 10 to
15 kt late in the evening, then becoming north 10 to 20 kt
overnight. Waves 2 to 4 ft.
.TUESDAY...North winds 10 to 20 kt. Waves 3 to 5 ft.
.TUESDAY NIGHT...North winds 10 to 20 kt. Waves 2 to 4 ft.
.WEDNESDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 2 to 4 ft subsiding to 1 to 3 ft.
.WEDNESDAY NIGHT...North winds 10 to 15 kt becoming northeast.
Waves 1 to 2 ft.
.THURSDAY...Southeast winds 10 to 15 kt becoming south 10 to
20 kt. Waves 1 to 2 ft building to 1 to 3 ft.
.FRIDAY...South winds to 30 kt. Chance of showers. Waves 8 to
11 ft occasionally to 14 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-130315-
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-
354 PM CDT Sun Oct 12 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Southeast winds 10 to 20 kt becoming south 15 to
25 kt. Waves 2 to 4 ft.
.MONDAY...South winds 10 to 20 kt diminishing to 10 to 15 kt.
Slight chance of showers. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.MONDAY NIGHT...Northwest winds 5 to 10 kt becoming north late in
the evening, then increasing to 10 to 15 kt after midnight
increasing to 10 to 20 kt late. Waves 1 to 3 ft building to 2 to
4 ft.
.TUESDAY...North winds 10 to 20 kt. Waves 4 to 7 ft occasionally
to 9 ft.
.TUESDAY NIGHT...North winds 15 to 25 kt becoming northeast 10 to
20 kt. Chance of showers. Waves 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt becoming north 10 to
15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt becoming east.
Waves 1 to 3 ft.
.THURSDAY...Southeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 2 to 4 ft.
.FRIDAY...South winds to 30 kt. Waves 8 to 11 ft occasionally to
14 ft.

$$

LMZ761-130315-
MAFOR 1222/
MICHIGAN NORTH 11320 12330 12430 12420 11520. A chance of showers
Monday morning. Waves 1 to 3 feet building to 2 to 4 feet
tonight. Waves 2 to 4 feet subsiding to 1 to 3 feet Monday.

MICHIGAN SOUTH 11320 13330 13420 11410. Waves 1 to 3 feet
building to 2 to 4 feet tonight. Waves 2 to 4 feet subsiding to 1
to 3 feet Monday.

$$
Wood

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

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