082
FZUS63 KMKX 030810
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
310 AM CDT Thu Jul 3 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 30.0 inches will linger across the Ohio
River Valley today, before moving to the east tonight into
Friday. Light west winds will become north to northeast today and
east to southeast tonight. Winds will then shift south on Friday,
as a warm front moves north through the region.

South to southwest winds will then increase Friday night into
Saturday night, as low pressure around 29.4 inches moves across
northern Ontario into Hudson Bay. The low will pull a cold front
through the region Saturday night into Sunday. Northwest winds
will become north behind this front Sunday and linger Sunday
night.

Mainly small chances for thunderstorms are forecast later tonight
into early Friday morning across southern portions of the lake.
More widespread chances for showers and thunderstorms are forecast
for later Saturday into Sunday, as the cold front crosses the
lake.

LMZ261-362-364-366-563-565-567-868-031530-
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-
310 AM CDT Thu Jul 3 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...North winds 5 to 10 kt becoming northeast 10 to 15 kt.
Waves 1 to 2 ft.
.TONIGHT...East winds 10 to 15 kt becoming southeast. Waves 1 to
2 ft.
.FRIDAY...Southeast winds 10 to 15 kt becoming south 10 to 20 kt.
Waves 1 to 3 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt becoming southwest. Waves
1 to 3 ft.
.SATURDAY...Southwest winds 15 to 25 kt becoming south to 30 kt.
Waves 2 to 4 ft building to 3 to 5 ft.
.SATURDAY NIGHT...Southwest winds to 30 kt diminishing to 10 to
20 kt. Showers likely with a chance of thunderstorms. Waves 4 to
6 ft occasionally to 8 ft.
.SUNDAY...Northwest winds 10 to 20 kt becoming north. Chance of
showers. Waves 3 to 5 ft.
.MONDAY...Northeast winds 10 to 15 kt becoming north 10 to 20 kt.
Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-031530-
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-
310 AM CDT Thu Jul 3 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Northwest winds 5 to 10 kt becoming northeast 10 to
15 kt. Waves 1 to 2 ft.
.TONIGHT...Northeast winds 10 to 15 kt veering to southeast.
Waves 1 to 2 ft.
.FRIDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt. Waves 1 to 3 ft.
.SATURDAY...Southwest winds 10 to 20 kt becoming south 15 to
25 kt. Waves 2 to 4 ft building to 3 to 5 ft.
.SATURDAY NIGHT...Southwest winds 10 to 20 kt. Chance of showers
and thunderstorms. Waves 3 to 5 ft.
.SUNDAY...West winds 10 to 20 kt becoming north. Chance of
showers. Waves 3 to 5 ft.
.MONDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 2 to 4 ft.

$$

LMZ761-031530-
MAFOR 0310/
MICHIGAN NORTH 12800 12810 11210 11200 11300 11310. Waves 1 foot
or less.

MICHIGAN SOUTH 12700 12810 11110 11100 11200 11310. Waves 1 foot
or less.

$$
Wood

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

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