348
FZUS63 KMKX 100149
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
849 PM CDT Sat Aug 9 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 to modest southerly winds will continue this weekend into
early next week. Numerous showers and thunderstorms are expected
tonight over the south half of the lake. More showers and storms
are expected each day into the first half of next week. Patchy
dense fog may occur at times due to the abundant moist conditions.


LMZ261-362-364-366-563-565-567-868-100930-
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-
849 PM CDT Sat Aug 9 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Southwest winds 15 to 25 kt becoming south
10 to 20 kt. Scattered showers and thunderstorms. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft.
.SUNDAY...South winds 10 to 20 kt. Scattered showers and
thunderstorms. Waves 2 to 4 ft.
.SUNDAY NIGHT...Southwest winds 10 to 20 kt diminishing to 10 to
15 kt. Scattered showers and thunderstorms in the evening, then
scattered showers overnight. Waves 2 to 4 ft subsiding to 1 to
3 ft.
.MONDAY...Southwest winds 10 to 20 kt. Chance of showers. Waves
1 to 3 ft.
.MONDAY NIGHT...Southwest winds 10 to 15 kt. Chance of showers.
Waves 1 to 3 ft.
.TUESDAY...Southwest winds 10 to 20 kt. Chance of showers. Waves
1 to 2 ft.
.TUESDAY NIGHT...West winds 10 to 20 kt becoming northwest 5 to
10 kt. Waves 1 to 2 ft.
.WEDNESDAY...Northwest winds 10 to 15 kt becoming north. Waves
1 to 2 ft.
.THURSDAY...Southeast winds 10 to 15 kt. Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-100930-
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-
849 PM CDT Sat Aug 9 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...South winds 15 to 25 kt diminishing to 10 to
20 kt. Numerous showers and scattered thunderstorms through early
evening, then scattered showers with isolated thunderstorms
overnight. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft.
.SUNDAY...South winds 10 to 20 kt. Scattered showers with
isolated thunderstorms in the morning, then scattered showers and
thunderstorms in the afternoon. Waves 2 to 4 ft.
.SUNDAY NIGHT...South winds 10 to 15 kt. Scattered showers and
thunderstorms in the evening, then chance of showers and
thunderstorms overnight. Waves 2 to 4 ft.
.MONDAY...Southwest winds 10 to 20 kt becoming south. Chance of
showers and thunderstorms. Waves 1 to 3 ft.
.MONDAY NIGHT...Southwest winds 10 to 15 kt diminishing to 5 to
10 kt. Chance of showers and thunderstorms. Waves 1 to 3 ft.
.TUESDAY...Southwest winds 10 to 15 kt. Chance of showers. Waves
1 to 2 ft.
.TUESDAY NIGHT...Southwest winds 10 to 15 kt becoming west 5 to
10 kt. Waves 1 to 2 ft.
.WEDNESDAY...Northwest winds 5 to 10 kt becoming north 10 to
15 kt. Waves 1 to 2 ft.
.THURSDAY...East winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 2 ft.

$$

LMZ761-100930-
MAFOR 1004/
MICHIGAN NORTH 11420 19429 11420 19426 11420 19429 12420 19426
11420 19429 11520 19529 11510 19519. Waves 3 to 5 feet subsiding
to 2 to 4 feet overnight. Waves 1 to 3 feet Sunday and Sunday
evening.

MICHIGAN SOUTH 13420 19426 11420 12420 19429 12410 19419. Waves 2
to 4 feet subsiding to 1 to 3 feet overnight. Waves 1 to 3 feet
Sunday and Sunday evening.

$$


Gehring

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

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