455
FZUS63 KMKX 040204
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
904 PM CDT Fri Oct 3 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...

Broad high pressure of 30.4 inches will linger over the east
coast of the United States through this weekend, generally moving
southward with time. Winds will continue from a southerly to
southwesterly direction, with light to moderate speeds into
Saturday morning. Winds are expected to pick up Saturday afternoon
as a stronger pressure gradient moves over the lake between the
high pressure and approaching low pressure of 29.5 inches over the
northern plains.

Gusty south to southwest winds will then continue through Sunday,
with some potential for gales Sunday afternoon over the northern
third of Lake Michigan. Have held off on a Gale Watch at this
time, as the overall speed of winds have come down slightly with
this round of forecasts, but trends will be monitored for a Watch
going into Saturday.

Winds should then ease Monday morning following the passage of a
frontal boundary.

LMZ261-362-364-366-563-565-567-868-040945-
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-
904 PM CDT Fri Oct 3 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...South winds 10 to 20 kt. Waves 1 to 3 ft.
.SATURDAY...South winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 2 to 4 ft building to 3 to 5 ft.
.SATURDAY NIGHT...South winds to 30 kt diminishing to 15 to
25 kt. Waves 4 to 6 ft occasionally to 8 ft.
.SUNDAY...South winds to 30 kt increasing to gales to 35 kt.
Waves 4 to 7 ft occasionally to 9 ft building to 7 to 10 ft
occasionally to 13 ft.
.SUNDAY NIGHT...South gales to 35 kt becoming southwest. Waves
8 to 11 ft occasionally to 14 ft.
.MONDAY...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.
.MONDAY NIGHT...North winds 10 to 15 kt. Chance of showers. Waves
2 to 4 ft subsiding to 1 to 2 ft.
.TUESDAY...Northwest winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 2 to 4 ft.
.WEDNESDAY...Northeast winds 10 to 15 kt. Waves 2 to 4 ft
subsiding to 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-040945-
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-
904 PM CDT Fri Oct 3 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...South winds 10 to 20 kt becoming southwest
10 to 15 kt. Waves 1 to 3 ft.
.SATURDAY...Southwest winds 10 to 15 kt becoming south 15 to
25 kt. Waves 1 to 3 ft building to 2 to 4 ft.
.SATURDAY NIGHT...South winds 10 to 20 kt. Waves 3 to 5 ft.
.SUNDAY...South winds 15 to 25 kt increasing to 30 kt. Waves 3 to
5 ft building to 6 to 9 ft occasionally to 12 ft.
.SUNDAY NIGHT...South winds to 30 kt. Waves 6 to 9 ft
occasionally to 12 ft.
.MONDAY...Southwest winds 10 to 20 kt becoming west. Chance of
showers. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.MONDAY NIGHT...North winds 10 to 15 kt increasing to 10 to
20 kt. Showers with a chance of thunderstorms. Waves 2 to 4 ft.
.TUESDAY...North winds 10 to 20 kt. Chance of showers. Waves 3 to
5 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft.

$$

LMZ761-040945-
MAFOR 0404/
MICHIGAN NORTH 11420 11410 13420 13430. Waves 1 to 3 feet
overnight. Waves 1 to 3 feet building to 2 to 4 feet Saturday.
Waves 3 to 6 feet Saturday evening.

MICHIGAN SOUTH 12410 11510 11410 12420 11430 11420. Waves 2 feet
or less overnight. Waves 1 to 3 feet building to 2 to 4 feet
Saturday. Waves 2 to 4 feet Saturday evening.

$$


Kuroski

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

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