361
FZUS63 KMKX 090212
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
912 PM CDT Wed Oct 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...

High pressure around 30.5 inches over the eastern Upper Peninsula
of Michigan will shift eastward overnight into Thursday, becoming
centered over New York by Thursday evening. East winds overnight
will veer south to southeast by late Thursday morning, as the
high shifts eastward.

Southwest winds will then increase Thursday night into Friday,
ahead of an approaching low around 29.8 inches and an associated
cold front. Wind gusts up to 30 knots will be possible through
this period. North to northeast winds will return Saturday, as the
low moves into southern Michigan.

LMZ261-362-364-366-563-565-567-868-090915-
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-
912 PM CDT Wed Oct 8 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Northeast winds 10 to 15 kt becoming
southeast. Waves 1 to 2 ft.
.THURSDAY...Southeast winds 10 to 15 kt becoming south 10 to
20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt becoming southwest
15 to 25 kt. Waves 3 to 5 ft building to 4 to 6 ft occasionally
to 8 ft.
.FRIDAY...Southwest winds 15 to 25 kt. Chance of showers. Waves
6 to 9 ft occasionally to 12 ft.
.FRIDAY NIGHT...West winds 15 to 25 kt becoming north 10 to
20 kt. Chance of showers. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...Northeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 2 to 4 ft.
.SATURDAY NIGHT...East winds 10 to 15 kt. Waves 1 to 3 ft.
.SUNDAY...Southeast winds 10 to 20 kt. Waves 2 to 4 ft.
.MONDAY...South winds 15 to 25 kt diminishing to 10 to 20 kt.
Chance of showers. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 7 ft occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-090915-
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-
912 PM CDT Wed Oct 8 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northeast winds 10 to 15 kt becoming
southeast. Waves 1 to 3 ft.
.THURSDAY...Southeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...Southeast winds 10 to 20 kt becoming south
15 to 25 kt. Waves 3 to 5 ft building to 4 to 6 ft occasionally
to 8 ft.
.FRIDAY...South winds 15 to 25 kt becoming southwest. Chance of
showers in the afternoon. Waves 6 to 9 ft occasionally to 12 ft.
.FRIDAY NIGHT...West winds 15 to 25 kt becoming northwest 10 to
20 kt. Chance of showers. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...Northwest winds 10 to 20 kt becoming north 10 to
15 kt. Waves 3 to 5 ft.
.SATURDAY NIGHT...Northeast winds 10 to 15 kt becoming east 10 to
20 kt. Waves 2 to 4 ft.
.SUNDAY...East winds 10 to 20 kt becoming southeast. Waves 3 to
5 ft.
.MONDAY...Southeast winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft.

$$

LMZ761-090915-
MAFOR 0904/
MICHIGAN NORTH 11210 11310 11300 12410 13420. Waves 2 feet or
less overnight. Waves 1 to 3 feet Thursday. Waves 2 to 4 feet
Thursday evening.

MICHIGAN SOUTH 12210 14310 11320 11420. Waves 1 to 3 feet
overnight and Thursday. Waves 1 to 3 feet building to 2 to 4 feet
Thursday 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