557
FZUS63 KMKX 301340
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
840 AM CDT Mon Jun 30 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...

Weak southwest winds are expected today, before becoming westerly
and northwesterly tonight into Tuesday morning behind a cold
front. Winds will turn back to the southwest later Wednesday and
Thursday, as weak high pressure of 30.0 inches moves through the
Ohio Valley.

LMZ261-362-364-366-563-565-567-868-302115-
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-
840 AM CDT Mon Jun 30 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Southwest winds 5 to 10 kt increasing to 10 to
15 kt. Slight chance of showers and thunderstorms. Waves 1 to
2 ft.
.TONIGHT...Southwest winds 10 to 15 kt becoming west. Slight
chance of showers and thunderstorms in the evening. Waves 1 to
2 ft.
.TUESDAY...West winds 10 to 15 kt becoming southwest 10 to 20 kt.
Waves 1 to 3 ft.
.TUESDAY NIGHT...Southwest winds 10 to 20 kt becoming west 10 to
15 kt. Waves 1 to 2 ft.
.WEDNESDAY...West winds 10 to 15 kt becoming southwest 10 to
20 kt. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 kt becoming northwest
5 to 10 kt. Waves 1 to 2 ft.
.THURSDAY...North winds 10 to 15 kt becoming northeast. Waves
1 to 2 ft.
.FRIDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-302115-
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-
840 AM CDT Mon Jun 30 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Southwest winds 5 to 10 kt. Slight chance of
showers and thunderstorms. Waves 1 ft or less.
.TONIGHT...West winds 5 to 10 kt becoming northwest 10 to 20 kt.
Slight chance of showers and thunderstorms in the evening. Waves
1 to 3 ft.
.TUESDAY...Northwest winds 10 to 20 kt becoming southwest 10 to
15 kt. Waves 1 to 3 ft.
.TUESDAY NIGHT...Southwest winds 5 to 10 kt becoming west. Waves
1 to 2 ft.
.WEDNESDAY...West winds 10 to 15 kt becoming southwest. Waves
1 to 2 ft.
.WEDNESDAY NIGHT...Southwest winds 10 to 15 kt becoming west 5 to
10 kt. Waves 1 to 2 ft.
.THURSDAY...Northwest winds 5 to 10 kt becoming north 10 to
15 kt. Waves 1 to 2 ft.
.FRIDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.

$$

LMZ761-302115-
MAFOR 3016/
MICHIGAN NORTH 14510 14610. Waves 2 feet or less.

MICHIGAN SOUTH 13500 12610 13710. Waves 2 feet or less this
afternoon and tonight. Waves 1 to 3 feet Tuesday morning.

$$


Boxell

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

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