830
FZUS63 KMKX 041344
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
844 AM CDT Mon Aug 4 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 around 30.2 inches will remain over the Great Lakes
Region through Tuesday. Light and variable winds are expected
across the Lake until the high shifts eastward into the New
England states by mid-week. Light to moderate southerly winds
return will return Wednesday. A low pressure system around 29.8
inches will move from the Northern Plains toward Hudson Bay and
drag a warm front across Lake Michigan Wednesday into Thursday.
Isolated showers and storms will be possible across the northern
third of the lake. Winds will remain southerly through the end of
the week.

LMZ261-362-364-366-563-565-567-868-042115-
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-
844 AM CDT Mon Aug 4 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...East winds 5 to 10 kt becoming northeast. Waves
1 ft or less.
.TONIGHT...Northeast winds 10 to 15 kt becoming southeast. Areas
of smoke. Waves 1 to 2 ft.
.TUESDAY...Southeast winds 5 to 10 kt backing to northeast 10 to
15 kt. Areas of smoke. Waves 1 to 2 ft.
.TUESDAY NIGHT...Northeast winds 10 to 20 kt becoming southeast
10 to 15 kt. Areas of smoke in the evening. Waves 1 to 2 ft.
.WEDNESDAY...Southeast winds 10 to 15 kt becoming east 10 to
20 kt. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...East winds 10 to 15 kt becoming south. Waves
1 to 2 ft.
.THURSDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.FRIDAY...South winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-042115-
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-
844 AM CDT Mon Aug 4 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Southeast winds 10 to 15 kt backing to north.
Waves 1 ft or less.
.TONIGHT...Northeast winds 5 to 10 kt becoming east. Areas of
smoke. Waves 1 to 2 ft.
.TUESDAY...East winds 10 to 15 kt backing to north. Areas of
smoke in the morning. Waves 1 to 2 ft.
.TUESDAY NIGHT...Northeast winds 10 to 15 kt becoming east. Waves
1 to 2 ft.
.WEDNESDAY...Southeast winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...East winds 5 to 10 kt becoming south. Waves
1 to 2 ft.
.THURSDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.FRIDAY...South winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ761-042115-
MAFOR 0416/
MICHIGAN NORTH 11200 13110 11210 12310 11300. Waves 1 foot or
less.

MICHIGAN SOUTH 11200 11100 11800 12100 11200 11210 11200. Waves 1
foot or less.

$$


Kuroski

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

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