911
FZUS63 KMKX 082005
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
305 PM CDT Wed Oct 8 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...

High pressure of 30.5 inches centered over northern Wisconsin
this afternoon will shift eastward tonight into tomorrow, becoming
centered over New York by evening. Northerly winds through the
rest of today will gradually veer to southerly by late Thursday
morning as the high shifts eastward. Southwest winds will then
increase Thursday night into Friday ahead of an approaching low
and associated cold front. Wind gusts of 20 to 30 knots will be
possible through this windier period. Northerly winds will
return Saturday on the back side of the low of 29.9 inches over
Michigan.

LMZ261-362-364-366-563-565-567-868-090315-
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-
305 PM CDT Wed Oct 8 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Northeast winds 10 to 15 kt veering to southeast.
Waves 1 to 3 ft.
.THURSDAY...Southeast winds 10 to 15 kt becoming south 10 to
20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt becoming southwest
15 to 25 kt. Waves 3 to 5 ft building to 4 to 6 ft occasionally
to 8 ft.
.FRIDAY...Southwest winds 15 to 25 kt. Chance of showers. Waves
6 to 9 ft occasionally to 12 ft.
.FRIDAY NIGHT...West winds 15 to 25 kt becoming north 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.
.SATURDAY...Northeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 2 to 4 ft.
.SATURDAY NIGHT...East winds 10 to 15 kt. Waves 1 to 3 ft.
.SUNDAY...Southeast winds 10 to 20 kt. Waves 2 to 4 ft.
.MONDAY...South winds 15 to 25 kt diminishing to 10 to 20 kt.
Chance of showers. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 7 ft occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-090315-
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-
305 PM CDT Wed Oct 8 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Northeast winds 10 to 15 kt veering to southeast.
Waves 2 to 4 ft.
.THURSDAY...Southeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...Southeast winds 10 to 20 kt becoming south
15 to 25 kt. Waves 3 to 5 ft building to 4 to 6 ft occasionally
to 8 ft.
.FRIDAY...South winds 15 to 25 kt becoming southwest. Chance of
showers in the afternoon. Waves 6 to 9 ft occasionally to 12 ft.
.FRIDAY NIGHT...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.
.SATURDAY...Northwest winds 10 to 20 kt becoming north 10 to
15 kt. Waves 3 to 5 ft.
.SATURDAY NIGHT...Northeast winds 10 to 15 kt becoming east 10 to
20 kt. Waves 2 to 4 ft.
.SUNDAY...East winds 10 to 20 kt becoming southeast. Waves 3 to
5 ft.
.MONDAY...Southeast winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft.

$$

LMZ761-090315-
MAFOR 0822/
MICHIGAN NORTH 12110 11210 11310 11300 12410 11420. Waves 2 feet
or less tonight. Waves 1 to 3 feet Thursday.

MICHIGAN SOUTH 12110 12210 14310. Waves 1 to 3 feet.

$$

DDV

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

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