869
FZUS63 KMKX 231935
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
235 PM CDT Wed Sep 23 2026

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...

An east to west high pressure area around 30.6 inches will remain
from southern Quebec to Ontario through Thursday. Modest easterly
winds will continue, then become east southeast for Thursday
night into the weekend as the high reorients from the northern
Great Lakes to James Bay.

LMZ261-362-364-366-563-565-567-868-240315-
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-
235 PM CDT Wed Sep 23 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Northeast winds 10 to 20 kt becoming southeast. Waves
2 to 4 ft.
.THURSDAY...Southeast winds 10 to 20 kt becoming northeast. Waves
2 to 4 ft.
.THURSDAY NIGHT...Northeast winds 10 to 20 kt veering to south
10 to 15 kt. Waves 1 to 3 ft.
.FRIDAY...South winds 10 to 15 kt diminishing to 5 to 10 kt.
Waves 1 to 3 ft.
.FRIDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Waves
1 ft or less.
.SATURDAY...Southeast winds 10 to 15 kt. Waves 1 to 2 ft.
.SATURDAY NIGHT...East winds 5 to 10 kt becoming southeast. Waves
1 ft or less.
.SUNDAY...South winds 5 to 10 kt becoming southwest. Waves 1 ft
or less.
.MONDAY...Southwest winds 5 to 10 kt. Waves nearly calm.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-240315-
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-
235 PM CDT Wed Sep 23 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Northeast winds 15 to 25 kt becoming east 10 to 20 kt.
Waves 3 to 5 ft.
.THURSDAY...East winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 3 to 5 ft subsiding to 2 to 4 ft.
.THURSDAY NIGHT...East winds 10 to 15 kt becoming southeast.
Waves 2 to 4 ft.
.FRIDAY...Southeast winds 10 to 15 kt becoming east in the
afternoon. Waves 2 to 4 ft.
.FRIDAY NIGHT...Northeast winds 10 to 15 kt becoming east. Waves
1 to 2 ft.
.SATURDAY...Southeast winds 10 to 15 kt. Waves 1 to 3 ft.
.SATURDAY NIGHT...East winds 5 to 10 kt becoming southeast. Waves
1 to 2 ft.
.SUNDAY...Southeast winds 5 to 10 kt. Waves 1 to 2 ft.
.MONDAY...Southeast winds 5 to 10 kt becoming south. Waves 1 ft
or less.

$$

LMZ761-240315-
MAFOR 2322/
MICHIGAN NORTH 11120 11230 12320 13310 11120. Waves 1 to 3 feet
building to 2 to 4 feet tonight. Waves 1 to 3 feet Thursday.

MICHIGAN SOUTH 11120 12230 14220 11210. Waves 2 to 4 feet
tonight. Waves 2 to 4 feet subsiding to 1 to 3 feet Thursday.

$$


Gehring

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

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