342
FZUS63 KMKX 041342
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
842 AM CDT Thu Jun 4 2026

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 of 30.2 inches over the southeastern US will drift
east toward the Atlantic today into tomorrow as a low of 29.6
inches over the Central Plains connects to another low of 29.7
inches over southern Manitoba as a cold front between the two
tracks east into Friday. Continue to see this low pressure track
east across the northern Great Lakes through Friday bringing
prevailing southwesterly winds to Lake Michigan along with shower
and thunderstorm chances tonight through Friday ahead of the cold
front. Then expect the cold front to push through the region later
Friday into Saturday bringing additional shower and thunderstorm
chances along with a more northwest to westerly wind shift behind
it into Saturday. Then winds weaken and become more variable as
high pressure around 30.0 inches builds across the region later
Saturday into Sunday. Looking ahead to the start of next week will
bring an additional low pressure system to develop over the
Plains and bring a return of southerly winds to the Upper Great
Lakes.

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-
842 AM CDT Thu Jun 4 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...South winds 10 to 20 kt increasing to 15 to
25 kt. Waves 1 to 3 ft building to 4 to 6 ft occasionally to
8 ft.
.TONIGHT...South winds 15 to 25 kt becoming southwest 10 to
20 kt. Slight chance of showers in the evening, then chance of
showers overnight. Waves 4 to 6 ft occasionally to 8 ft subsiding
to 3 to 5 ft.
.FRIDAY...South winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of showers. Waves 4 to 6 ft occasionally to 8 ft.
.FRIDAY NIGHT...Southwest winds 10 to 20 kt becoming west 10 to
15 kt. Showers likely with a chance of thunderstorms in the
evening, then showers likely overnight. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft.
.SATURDAY...North winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 3 ft.
.SATURDAY NIGHT...North winds 5 to 10 kt becoming northeast.
Waves 1 to 2 ft.
.SUNDAY...Northeast winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.
.MONDAY...Southeast winds 10 to 20 kt becoming east. 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-
842 AM CDT Thu Jun 4 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...South winds 10 to 15 kt increasing to 15 to
25 kt. Waves 1 to 3 ft building to 4 to 6 ft occasionally to
8 ft.
.TONIGHT...South winds 10 to 20 kt. Waves 4 to 6 ft occasionally
to 8 ft subsiding to 3 to 5 ft.
.FRIDAY...South winds 10 to 20 kt increasing to 15 to 25 kt.
Showers likely in the morning, then showers likely with a chance
of thunderstorms in the afternoon. Waves 4 to 6 ft occasionally
to 8 ft.
.FRIDAY NIGHT...Southwest winds 15 to 25 kt becoming west 10 to
20 kt. Showers likely with a chance of thunderstorms. Waves 4 to
6 ft occasionally to 8 ft subsiding to 3 to 5 ft.
.SATURDAY...West winds 10 to 20 kt veering to north 10 to 15 kt.
Chance of showers in the morning. Waves 2 to 4 ft subsiding to
1 to 2 ft.
.SATURDAY NIGHT...North winds 5 to 10 kt becoming northeast.
Waves 1 ft or less.
.SUNDAY...Northeast winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 2 ft.
.MONDAY...Southeast winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ761-042115-
MAFOR 0416/
MICHIGAN NORTH 11420 13430 11420 11520 11420 11426. Waves 1 to 3
feet building to 3 to 5 feet this afternoon. Waves 3 to 5 feet
subsiding to 2 to 4 feet tonight. Waves 2 to 4 feet Friday
morning.

MICHIGAN SOUTH 11420 12430 14420 11426. Waves 1 to 3 feet
building to 3 to 5 feet this afternoon. Waves 3 to 5 feet
subsiding to 2 to 4 feet tonight. Waves 2 to 4 feet Friday
morning.

$$


Halbach

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

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