846
FZUS63 KMKX 161359
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
859 AM CDT Wed Sep 16 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 30.4 inches will track east across southern
Ontario through today, with mostly northeast winds. A frontal
feature stalled over the southern tip of the lake may allow for
isolated thunderstorms through today. Predominantly light and
variable winds expected late tonight through Thursday as high
pressure continues to build eastward and additional reinforcing
high pressure builds back in across the Canadian Prairies.

Breezy east to northeast winds may then develop Friday into this
weekend as low pressure around 29.8 inches develops in the
central Plains and lifts into the Upper Midwest by Saturday.
Gusty southeasterly winds develop Saturday as low pressure
approaches, crossing the southern portion of the Lake as high
pressure continues across Ontario, bringing continued generally
easterly winds and perhaps gales at times throughout the day.
Saturday night, winds turn northeasterly, continuing through
Sunday. Gale potential diminishes late Saturday night, although
gusts around 30 kt are possible through Sunday for the southern
two-thirds.

LMZ261-362-364-366-563-565-567-868-162115-
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-
859 AM CDT Wed Sep 16 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Northeast winds 10 to 15 kt. Waves 2 to 4 ft
subsiding to 1 to 2 ft.
.TONIGHT...Northeast winds 10 to 15 kt becoming east 5 to 10 kt.
Chance of showers overnight. Waves 1 to 2 ft.
.THURSDAY...East winds 5 to 10 kt backing to northwest. Waves
1 to 2 ft.
.THURSDAY NIGHT...North winds 10 to 20 kt becoming northeast.
Waves 1 to 2 ft.
.FRIDAY...Northeast winds 10 to 20 kt becoming east 10 to 15 kt.
Waves 1 to 3 ft.
.FRIDAY NIGHT...East winds 15 to 25 kt becoming southeast to
30 kt. Showers likely. Waves 3 to 5 ft building to 6 to 9 ft
occasionally to 12 ft.
.SATURDAY...Southeast winds to 30 kt becoming east. Chance of
showers. Waves 7 to 10 ft occasionally to 13 ft.
.SUNDAY...Northeast winds 15 to 25 kt. Waves 4 to 6 ft
occasionally to 8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-162115-
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-
859 AM CDT Wed Sep 16 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Northeast winds 10 to 15 kt increasing to 10 to
20 kt. Chance of showers and slight chance of thunderstorms
through mid morning, then chance of showers this afternoon. Waves
4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.TONIGHT...Northeast winds 10 to 20 kt becoming east 10 to 15 kt,
then diminishing to 5 to 10 kt late. Chance of showers and slight
chance of thunderstorms. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.THURSDAY...Northeast winds 5 to 10 kt becoming north 10 to
15 kt. Chance of showers in the morning. Waves 1 to 2 ft.
.THURSDAY NIGHT...North winds 10 to 15 kt becoming northeast
10 to 20 kt. Waves 1 to 3 ft.
.FRIDAY...East winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 2 to 4 ft.
.FRIDAY NIGHT...East winds 15 to 25 kt becoming southeast to
30 kt. Showers with a chance of thunderstorms. Waves 4 to 6 ft
occasionally to 8 ft building to 7 to 10 ft occasionally to
13 ft.
.SATURDAY...Southeast winds to 30 kt. Showers with a chance of
thunderstorms. Waves 8 to 11 ft occasionally to 14 ft subsiding
to 7 to 10 ft occasionally to 13 ft.
.SUNDAY...Northeast winds to 30 kt. Chance of showers. Waves 6 to
9 ft occasionally to 12 ft.

$$

LMZ761-162115-
MAFOR 1616/
MICHIGAN NORTH 14110 11210 13200. A chance of showers overnight.
Waves 1 to 3 feet this afternoon. Waves 2 feet or less tonight
and Thursday morning.

MICHIGAN SOUTH 14110 11210 11200 12100. A chance of showers.
Waves 3 to 5 feet subsiding to 1 to 3 feet this afternoon. Waves
1 to 3 feet tonight. Waves 2 feet or less Thursday morning.

$$


Kuroski

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

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