289
FZUS63 KMKX 101956
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
256 PM CDT Wed Sep 10 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...

30.3 inch high pressure near the Hudson Bay is supporting
generally south to southeast winds across the open waters of Lake
Michigan this afternoon. The aforementioned high will settle near
the Ontario-Quebec border on Thursday, allowing winds to shift
out of the northeast tonight through Thursday afternoon. Light
rain showers are possible through this afternoon. An isolated
rumble of thunder can`t be ruled out, though hazards are not
anticipated. High pressure will continue to move east into Quebec
on Friday as 29.7 inch low pressure moves into the northern Great
Plains, allowing winds to turn southerly across the waters.
Showers and embedded thunderstorms are expected Friday night into
Saturday. Hazards aren`t currently anticipated in this activity,
though trends will continue to be monitored in coming forecasts.
Winds will turn back out of the northeast Saturday night through
Sunday as 30.3 inch high pressure settles along the Ontario-Quebec
border.

LMZ261-362-364-366-563-565-567-868-110315-
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-
256 PM CDT Wed Sep 10 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Northwest winds less than 10 kt becoming northeast.
Patchy fog overnight. Waves 1 ft or less.
.THURSDAY...Northeast winds 5 to 10 kt increasing to 10 to 15 kt.
Patchy fog in the morning. Waves 1 to 2 ft.
.THURSDAY NIGHT...Northeast winds 10 to 15 kt becoming east 5 to
10 kt. Waves 1 to 2 ft.
.FRIDAY...Southeast winds 5 to 10 kt becoming south. Waves 1 to
2 ft.
.FRIDAY NIGHT...Southeast winds 5 to 10 kt increasing to 10 to
15 kt. Waves 1 to 2 ft.
.SATURDAY...South winds 10 to 15 kt becoming southeast. Chance of
showers in the morning. Waves 1 to 3 ft.
.SATURDAY NIGHT...Northeast winds 5 to 10 kt. Waves 1 to 3 ft.
.SUNDAY...Northeast winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.
.MONDAY...Southeast winds 10 to 15 kt becoming east. Waves 1 to
3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-110315-
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-
256 PM CDT Wed Sep 10 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Northeast winds 5 to 10 kt. Waves 1 ft or less.
.THURSDAY...Northeast winds 5 to 10 kt becoming north 10 to
15 kt. Waves 1 to 2 ft.
.THURSDAY NIGHT...North winds 10 to 15 kt becoming east. Waves
1 to 2 ft.
.FRIDAY...Southeast winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 2 ft.
.FRIDAY NIGHT...Southeast winds 10 to 15 kt becoming south. Waves
1 to 3 ft.
.SATURDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Chance of showers in the morning. Waves 1 to 3 ft.
.SATURDAY NIGHT...East winds 10 to 15 kt becoming northeast.
Waves 1 to 3 ft.
.SUNDAY...Northeast winds 10 to 15 kt becoming north. Waves 1 to
3 ft.
.MONDAY...Southeast winds 10 to 15 kt becoming east. Waves 1 to
3 ft.

$$

LMZ761-110315-
MAFOR 1022/
MICHIGAN NORTH 11600 14100 11100 12110. Waves 1 foot or less.

MICHIGAN SOUTH 15100 11110 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