263
FZUS63 KMKX 061400
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
900 AM CDT Sun Sep 6 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 around 30.1 inches will build into the northern
Great Lakes today, shifting to the lower Great Lakes for Monday.
Light and variable winds are forecast through this period.

Increasing south to southwest winds are possible Tuesday into
Wednesday, shifting west to northwest Wednesday night into
Thursday, as a cold front moves toward and through the region.
Cannot rule out a few isolated gales Tuesday/Tuesday night.

LMZ261-362-364-366-563-565-567-868-062115-
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-
900 AM CDT Sun Sep 6 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...East winds 5 to 10 kt increasing to 10 to 15 kt
early this afternoon, then backing to west 10 to 20 kt late.
Waves 1 to 2 ft.
.TONIGHT...North winds 10 to 15 kt veering to east 5 to 10 kt
late in the evening, then becoming southeast after midnight
becoming south late. Waves 1 to 2 ft.
.MONDAY...South winds 5 to 10 kt becoming southwest. Waves 1 to
2 ft.
.MONDAY NIGHT...Southeast winds 10 to 15 kt becoming south 10 to
20 kt. Waves 1 to 2 ft building to 2 to 4 ft.
.TUESDAY...South winds 15 to 25 kt increasing to 30 kt. Chance of
showers in the afternoon. Waves 4 to 6 ft occasionally to 8 ft
building to 5 to 8 ft occasionally to 10 ft.
.TUESDAY NIGHT...South winds to 30 kt becoming southwest gales to
35 kt. Showers with a chance of thunderstorms. Waves 5 to 8 ft
occasionally to 10 ft.
.WEDNESDAY...Southwest gales to 35 kt becoming west. Waves 4 to
7 ft occasionally to 9 ft.
.THURSDAY...Northwest winds 15 to 25 kt increasing to 30 kt.
Waves 3 to 5 ft subsiding to 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-062115-
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-
900 AM CDT Sun Sep 6 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...East winds 10 to 15 kt backing to north. Waves 1
to 3 ft subsiding to 1 to 2 ft.
.TONIGHT...North winds 10 to 15 kt veering to southeast 10 to 15
kt. Waves 1 to 3 ft.
.MONDAY...Southeast winds 5 to 10 kt becoming east. Waves 1 to
2 ft.
.MONDAY NIGHT...East winds 10 to 15 kt becoming southeast 10 to
20 kt. Waves 1 to 2 ft building to 3 to 5 ft.
.TUESDAY...South winds 15 to 25 kt increasing to 30 kt. Waves
4 to 6 ft occasionally to 8 ft building to 4 to 7 ft occasionally
to 9 ft.
.TUESDAY NIGHT...South winds to 30 kt becoming southwest 15 to
25 kt. Chance of showers and thunderstorms. Waves 5 to 8 ft
occasionally to 10 ft.
.WEDNESDAY...Southwest winds 15 to 25 kt becoming west to 30 kt.
Chance of showers. Waves 4 to 7 ft occasionally to 9 ft.
.THURSDAY...Northwest winds 10 to 20 kt. Waves 4 to 6 ft
occasionally to 8 ft.

$$

LMZ761-062115-
MAFOR 0616/
MICHIGAN NORTH 11200 11610 11720 11210 12300 12400. Waves 1 foot
or less.

MICHIGAN SOUTH 11210 11810 11820 11110 11210 11310 12300. Waves 1
to 3 feet this afternoon. Waves 2 feet or less tonight and Monday
morning.

$$


Gehring

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

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