195
FZUS63 KMKX 291908
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
208 PM CDT Mon Sep 29 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...

Light and variable winds continue across the waters this afternoon
as 30.3 inch high pressure lingers over Lake Ontario. Patchy fog
is possible over far northern and western portions of the lake
later tonight. Currently centered along the Manitoba-Ontario
border, a second area of 30.4 inch high pressure will drift into
Ontario tonight through Tuesday, allowing east-northeast winds to
become established over Lake Michigan. The high will strengthen
to near 30.5 inches as it settles along the Ontario-Quebec border
Tuesday night through Wednesday, maintaining generally easterly
winds. The high will advance into the northeastern United States
through the end of the week, allowing winds to turn out of the
south Thursday through Friday. Broad low pressure will form over
the northern Great Plains Saturday, and will gradually attempt to
work toward the upper Mississippi River Valley by the end of next
weekend. Chances for isolated showers and thunderstorms return to
the forecast Saturday evening through Monday.

LMZ261-362-364-366-563-565-567-868-300315-
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-
208 PM CDT Mon Sep 29 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...South winds 5 to 10 kt backing to northeast. Patchy
fog overnight. Waves 1 ft or less.
.TUESDAY...East winds 10 to 20 kt becoming northeast. Waves 2 to
4 ft.
.TUESDAY NIGHT...Northeast winds 10 to 20 kt becoming east. Waves
2 to 4 ft.
.WEDNESDAY...Southeast winds 10 to 20 kt becoming east. Waves
2 to 4 ft.
.WEDNESDAY NIGHT...East winds 10 to 20 kt becoming southeast.
Waves 1 to 3 ft building to 3 to 5 ft.
.THURSDAY...South winds 10 to 20 kt. Waves 3 to 5 ft.
.THURSDAY NIGHT...South winds 10 to 15 kt increasing to 10 to
20 kt. Waves 1 to 3 ft.
.FRIDAY...South winds 10 to 20 kt. Waves 2 to 4 ft.
.SATURDAY...South winds 10 to 20 kt. Waves 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-300315-
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-
208 PM CDT Mon Sep 29 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Northeast winds 5 to 10 kt. Waves 1 ft or less.
.TUESDAY...Northeast winds 5 to 10 kt becoming north 10 to 15 kt.
Waves 1 to 2 ft.
.TUESDAY NIGHT...Northeast winds 10 to 15 kt becoming east 10 to
20 kt. Waves 1 to 3 ft building to 3 to 5 ft.
.WEDNESDAY...East winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 3 to 5 ft.
.WEDNESDAY NIGHT...East winds 10 to 20 kt becoming southeast.
Waves 2 to 4 ft building to 3 to 5 ft.
.THURSDAY...Southeast winds 10 to 20 kt. Waves 3 to 5 ft.
.THURSDAY NIGHT...Southeast winds 10 to 15 kt becoming south.
Waves 1 to 3 ft.
.FRIDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 2 to 4 ft.
.SATURDAY...South winds 10 to 20 kt. Waves 3 to 5 ft.

$$

LMZ761-300315-
MAFOR 2922/
MICHIGAN NORTH 11500 11300 11200 11100 11120 11220 12120. Waves 1
foot or less tonight. Waves 1 to 3 feet Tuesday.

MICHIGAN SOUTH 15100 11100 11810. Waves 1 foot or less.

$$


Quigley

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

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