380
FZUS63 KMKX 301350
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
850 AM CDT Fri Oct 30 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 work its way across the
Upper Great Lakes Region today with winds turning more
northeasterly and lessening as it moves over Lake Michigan. Then
winds become southeasterly later tonight as high pressure
slowly exits. Moderate southeasterly winds return for Saturday as
low pressure around 29.8 inches moves into the central Plains.
Light to moderate southeasterly to southerly winds then persist
into Monday, increasing for Tuesday as low pressure approaches.
Gales may be possible at times early next week.

LMZ261-362-364-366-563-565-567-868-302130-
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-
850 AM CDT Fri Oct 30 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Northwest winds 10 to 20 kt. Waves 1 to 3 ft
subsiding to 1 to 2 ft.
.TONIGHT...Northwest winds 10 to 15 kt backing to south. Waves
1 to 2 ft.
.SATURDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft building to 3 to 5 ft.
.SATURDAY NIGHT...South winds 10 to 15 kt. Waves 3 to 5 ft
subsiding to 2 to 4 ft.
.SUNDAY...South winds 10 to 15 kt becoming southwest. Waves 1 to
3 ft.
.SUNDAY NIGHT...South winds 5 to 10 kt. Waves 1 to 2 ft.
.MONDAY...South winds 10 to 15 kt becoming southeast 10 to 20 kt.
Waves 1 to 3 ft building to 3 to 5 ft.
.TUESDAY...Southeast gales to 35 kt becoming south gales to
40 kt. Showers likely. Waves 7 to 10 ft occasionally to 13 ft
building to 8 to 11 ft occasionally to 14 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-302130-
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-
850 AM CDT Fri Oct 30 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Northeast winds 10 to 20 kt diminishing to 5 to
10 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.TONIGHT...Northeast winds 10 to 15 kt becoming southeast. Slight
chance of showers overnight. Waves 1 to 3 ft.
.SATURDAY...Southeast winds 10 to 20 kt. Chance of showers. Waves
3 to 5 ft.
.SATURDAY NIGHT...Southeast winds 10 to 20 kt becoming south
10 to 15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SUNDAY...Southeast winds 10 to 15 kt. Waves 1 to 3 ft.
.SUNDAY NIGHT...Southeast winds 10 to 15 kt. Waves 1 to 3 ft.
.MONDAY...Southeast winds 10 to 20 kt. Waves 2 to 4 ft building
to 3 to 5 ft.
.TUESDAY...South gales to 40 kt. Chance of showers. Waves 7 to
10 ft occasionally to 13 ft building to 8 to 11 ft occasionally
to 14 ft.

$$

LMZ761-302130-
MAFOR 3016/
MICHIGAN NORTH 13710 13400 11410 11420. Waves 2 feet or less this
afternoon and tonight. Waves 1 to 3 feet Saturday morning.

MICHIGAN SOUTH 12100 11110 12210 12310 11320. A chance of showers
Saturday morning. Waves 1 to 3 feet this afternoon. Waves 2 feet
or less tonight. Waves 1 to 3 feet building to 2 to 4 feet
Saturday morning.

$$


Cronce

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

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