535
FZUS63 KMKX 010153
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
853 PM CDT Wed Sep 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...

Modest southwest winds will continue tonight then shift westerly
ahead of a cold front by the middle of Thursday. Expect winds to
then shift northwest with the frontal passage Thursday afternoon.
Modest to breezy northerly winds are then forecast Thursday night
and Friday. Strong high pressure around 30.4 inches will then overspread
the Great Lakes Friday night. This should bring lighter winds to
the lake Friday night into Saturday.

A fast-moving low pressure system around 29.8 inches should move
across or north of Lake Superior Saturday night, with high
pressure around 30.4 inches moving southeast into the region by
early next week. South to southwest winds Saturday night should
veer northwest to north Sunday into Monday across Lake Michigan.

LMZ261-362-364-366-563-565-567-868-010930-
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-
853 PM CDT Wed Sep 30 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...South winds 10 to 20 kt becoming southwest.
Patchy fog. Scattered showers overnight. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.THURSDAY...Southwest winds 10 to 20 kt veering to northwest.
Patchy fog in the morning. Scattered showers. Waves 2 to 4 ft
subsiding to 1 to 3 ft.
.THURSDAY NIGHT...North winds 10 to 20 kt becoming northwest.
Waves 3 to 5 ft.
.FRIDAY...Northwest winds 15 to 25 kt increasing to 30 kt. Waves
3 to 5 ft.
.FRIDAY NIGHT...North winds to 30 kt diminishing to 5 to 10 kt
overnight. Waves 2 to 4 ft subsiding to 1 to 2 ft.
.SATURDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft building to 2 to 4 ft.
.SATURDAY NIGHT...South winds 10 to 20 kt becoming southwest to
30 kt. Chance of showers. Waves 2 to 4 ft building to 4 to 6 ft
occasionally to 8 ft.
.SUNDAY...West winds to 30 kt becoming northwest. Waves 4 to 6 ft
occasionally to 8 ft.
.MONDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-010930-
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-
853 PM CDT Wed Sep 30 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...South winds 15 to 25 kt becoming southwest
10 to 20 kt. Patchy fog. Scattered showers through early evening,
then showers and slight chance of thunderstorms overnight. Waves
4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.
.THURSDAY...South winds 10 to 15 kt veering to northwest 10 to
20 kt. Patchy fog. Showers and slight chance of thunderstorms.
Waves 2 to 4 ft.
.THURSDAY NIGHT...North winds 10 to 20 kt. Patchy fog in the
evening. Scattered showers in the evening, then chance of showers
overnight. Waves 2 to 4 ft building to 4 to 6 ft occasionally to
8 ft.
.FRIDAY...North winds 15 to 25 kt. Waves 4 to 7 ft occasionally
to 9 ft.
.FRIDAY NIGHT...North winds 10 to 20 kt becoming east 10 to
15 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft.
.SATURDAY...Southeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 2 to 4 ft.
.SATURDAY NIGHT...South winds 10 to 20 kt becoming southwest.
Waves 2 to 4 ft.
.SUNDAY...West winds 10 to 20 kt becoming northwest. Waves 3 to
5 ft.
.MONDAY...North winds 10 to 20 kt. Waves 4 to 6 ft occasionally
to 8 ft.

$$

LMZ761-010930-
MAFOR 0104/
MICHIGAN NORTH 11520 12520 19526 11516 11610 19616 11720 19726
12820. Waves 3 to 5 feet subsiding to 2 to 4 feet overnight.
Waves 2 to 4 feet subsiding to 1 to 3 feet Thursday. Waves 1 to 3
feet Thursday evening.

MICHIGAN SOUTH 12526 12416 11526 11726 11816 11820 19826. Waves 3
to 5 feet subsiding to 2 to 4 feet overnight. Waves 1 to 3 feet
Thursday and Thursday evening.

$$


Gehring

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

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