469
FZUS63 KMKX 080200
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
900 PM CDT Tue Oct 7 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...

Breezy north winds across the lake will continue ahead of an area
of high pressure that will build in from the Plains tonight. This
high pressure around 30.4 inches will move across WI Wednesday
and settle over the Great Lakes Region through the second half of
the week. Southerly winds will continue until Thursday morning
when they turn to easterly and eventually southeasterly by
Thursday night. Southerly winds will increase heading becoming
breezy Friday as the high pressure continues to pull east and low
pressure around 29.8 inches advances from the Northern Plains.

LMZ261-362-364-366-563-565-567-868-080915-
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-
900 PM CDT Tue Oct 7 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...North winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...North winds 10 to 15 kt. Waves 2 to 4 ft subsiding
to 1 to 3 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt veering to
southeast. Waves 1 to 3 ft.
.THURSDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft building to 2 to 4 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt becoming southwest
15 to 25 kt. Waves 3 to 5 ft.
.FRIDAY...Southwest winds 15 to 25 kt. Waves 3 to 5 ft.
.FRIDAY NIGHT...Southwest winds 10 to 20 kt becoming west 5 to
10 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.SATURDAY...East winds 10 to 15 kt becoming southeast. Waves 1 to
2 ft.
.SUNDAY...Southeast winds 15 to 25 kt becoming south to 30 kt.
Waves 5 to 8 ft occasionally to 10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-080915-
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-
900 PM CDT Tue Oct 7 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...North winds 10 to 20 kt. Waves 4 to 6 ft
occasionally to 8 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 veering to
southeast. Waves 2 to 4 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.
Waves 3 to 5 ft.
.FRIDAY...Southwest winds 10 to 20 kt becoming south. Waves 3 to
5 ft.
.FRIDAY NIGHT...South winds 10 to 15 kt becoming southwest 5 to
10 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.SATURDAY...South winds 10 to 15 kt becoming southeast. Waves
1 to 3 ft.
.SUNDAY...Southeast winds 15 to 25 kt increasing to 30 kt. Waves
4 to 7 ft occasionally to 9 ft.

$$

LMZ761-080915-
MAFOR 0804/
MICHIGAN NORTH 11830 11820 14810 11810 11110. Waves 3 to 5 feet
overnight. Waves 2 to 4 feet subsiding to 1 to 3 feet Wednesday.
Waves 2 feet or less Wednesday evening.

MICHIGAN SOUTH 12830 12120 11110 11810 12110. Waves 2 to 4 feet
building to 3 to 5 feet overnight. Waves 3 to 5 feet subsiding to
2 to 4 feet Wednesday. Waves 1 to 3 feet Wednesday evening.

$$


Sheppard

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

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