153
FZUS63 KMKX 101935
GLFLM

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

Low pressure of 29.8 inches over northern Lake Superior this
afternoon will move southeast tonight, reaching southwest
Ontario by daybreak Saturday while weakening to 30.0 inches.
Meanwhile, high pressure of 30.2 inches will move in from the
northwest tonight into Saturday. Breezy southwest winds this
afternoon will become northwest to north later today into
tonight as a cold front drops through the area, while weakening
as the high builds into the area.

Southerly winds will return to the area Sunday into Monday as
the high heads east ahead of an approaching low and associated
cold front. Winds will also increase during this period, with
gusts of 20 to 25 knots possible at times.

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-
235 PM CDT Fri Oct 10 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Northwest winds to 30 kt becoming north 15 to 25 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.SATURDAY...North winds 10 to 20 kt becoming northeast 10 to
15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SATURDAY NIGHT...East winds 10 to 20 kt becoming southeast.
Waves 2 to 4 ft.
.SUNDAY...Southeast winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 3 to 5 ft.
.SUNDAY NIGHT...Southeast winds 15 to 25 kt. Waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft.
.MONDAY...South winds 10 to 20 kt. Chance of showers in the
afternoon. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft.
.MONDAY NIGHT...West winds 10 to 15 kt becoming north 10 to
20 kt. Waves 2 to 4 ft.
.TUESDAY...North winds 10 to 20 kt. Waves 3 to 5 ft.
.WEDNESDAY...North winds 10 to 20 kt. 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-
235 PM CDT Fri Oct 10 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...West winds to 30 kt becoming north 15 to 25 kt, then
diminishing to 10 to 20 kt late. Chance of showers this evening.
Waves 4 to 7 ft occasionally to 9 ft.
.SATURDAY...North winds 10 to 20 kt becoming northeast 10 to
15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft.
.SATURDAY NIGHT...Northeast winds 10 to 15 kt becoming southeast
10 to 20 kt. Waves 3 to 5 ft.
.SUNDAY...Southeast winds 10 to 20 kt. Waves 3 to 5 ft.
.SUNDAY NIGHT...Southeast winds 10 to 20 kt increasing to 15 to
25 kt. Waves 3 to 5 ft building to 4 to 6 ft occasionally to
8 ft.
.MONDAY...South winds 10 to 20 kt. Waves 4 to 6 ft occasionally
to 8 ft subsiding to 3 to 5 ft.
.MONDAY NIGHT...Northwest winds 10 to 15 kt becoming north 10 to
20 kt. Waves 2 to 4 ft.
.TUESDAY...North winds 10 to 20 kt. Waves 4 to 6 ft occasionally
to 8 ft.
.WEDNESDAY...North winds 10 to 20 kt. Waves 3 to 5 ft.

$$

LMZ761-110315-
MAFOR 1022/
MICHIGAN NORTH 12740 11840 12830 11120 12110. Waves 4 to 7 feet
subsiding to 3 to 6 feet tonight. Waves 3 to 5 feet subsiding to
1 to 3 feet Saturday.

MICHIGAN SOUTH 11630 11730 11830 13820 12110. A chance of showers
this evening. Waves 4 to 7 feet subsiding to 3 to 6 feet tonight.
Waves 3 to 5 feet subsiding to 2 to 4 feet Saturday.

$$


DDV

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

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