378
FZUS63 KMKX 020737
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
237 AM CDT Sat Aug 2 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 30.4 inches centered over Wisconsin will
slide across Lake Michigan this weekend and become centered over
Michigan on Sunday after weakening to around 30.1 inches. Light
and variable winds are expected under the high. Look for winds to
become east to southeast early next week as low pressure around
29.9 inches slowly approaches from the Northern Plains.

LMZ261-362-364-366-563-565-567-868-021515-
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-
237 AM CDT Sat Aug 2 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...West winds 10 to 15 kt becoming southwest. Areas of
smoke. Waves 1 to 2 ft.
.TONIGHT...Southwest winds 10 to 15 kt becoming west. Areas of
smoke. Waves 1 to 2 ft.
.SUNDAY...West winds 5 to 10 kt increasing to 10 to 15 kt late in
the morning, then becoming southwest 10 to 20 kt in the
afternoon. Areas of smoke. Waves 1 to 2 ft.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt backing to southeast
less than 10 kt overnight. Areas of smoke in the evening. Waves
1 ft or less.
.MONDAY...Southeast winds 5 to 10 kt becoming northeast. Waves
nearly calm.
.MONDAY NIGHT...Northeast winds 5 to 10 kt becoming southeast.
Waves 1 ft or less.
.TUESDAY...Southeast winds 10 to 15 kt. Waves 1 to 2 ft.
.WEDNESDAY...Southeast winds 10 to 15 kt becoming south. Waves
1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-021515-
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-
237 AM CDT Sat Aug 2 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Northeast winds 5 to 10 kt becoming north. Areas of
smoke this afternoon. Waves 1 to 3 ft.
.TONIGHT...Northwest winds 10 to 15 kt becoming north. Areas of
smoke. Waves 1 to 2 ft.
.SUNDAY...Northeast winds 5 to 10 kt becoming north. Areas of
smoke. Waves 1 ft or less.
.SUNDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Areas
of smoke in the evening. Waves 1 ft or less.
.MONDAY...Southeast winds 5 to 10 kt becoming east. Waves 1 ft or
less.
.MONDAY NIGHT...Northeast winds 5 to 10 kt becoming southeast.
Waves 1 to 2 ft.
.TUESDAY...Southeast winds 10 to 15 kt becoming east 5 to 10 kt.
Waves 1 to 2 ft.
.WEDNESDAY...Southeast winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 2 ft.

$$

LMZ761-021515-
MAFOR 0210/
MICHIGAN NORTH 11610 12600 14510 11610. Waves 2 feet or less.

MICHIGAN SOUTH 12100 12800 11710 13800. Waves 2 feet or less.

$$


DDV

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

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