520
FZUS63 KMKX 291414
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
914 AM CDT Wed Apr 29 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 30.3 inches over the northern Plains will
gradually shift southeastward into the western Great Lakes by the
end of the week. As a backdoor cold front continues to progress
southward, expect winds to continue to turn to northeasterly,
persisting into the morning before diminishing this afternoon.
Winds will then remain light through the remainder of the week. An
isolated storm is possible this afternoon and Thursday afternoon
near the Wisconsin shore. High pressure will slide southward into
the Lower Mississippi Valley Sunday, shifting winds to westerly
and increasing.

LMZ261-362-364-366-563-565-567-868-292115-
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-
914 AM CDT Wed Apr 29 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...North winds 10 to 20 kt becoming northwest.
Chance of rain showers. Waves 1 to 3 ft.
.TONIGHT...Northwest winds 10 to 15 kt becoming north. Slight
chance of rain showers in the evening. Waves 1 to 2 ft.
.THURSDAY...North winds 10 to 15 kt becoming northwest 10 to
20 kt. Waves 1 to 2 ft.
.THURSDAY NIGHT...North winds 10 to 20 kt becoming northwest.
Waves 1 to 3 ft.
.FRIDAY...Northwest winds 10 to 20 kt. Waves 1 to 3 ft.
.FRIDAY NIGHT...Northwest winds 10 to 20 kt. Waves 1 to 3 ft.
.SATURDAY...Northwest winds 10 to 20 kt becoming southwest. Waves
1 to 3 ft.
.SUNDAY...West winds 10 to 20 kt becoming southwest. Waves 2 to
4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-292115-
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-
914 AM CDT Wed Apr 29 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...North winds 10 to 20 kt. Chance of rain showers.
Waves 2 to 4 ft.
.TONIGHT...North winds 10 to 20 kt becoming northwest 5 to 10 kt.
Waves 2 to 4 ft subsiding to 1 to 3 ft.
.THURSDAY...Northwest winds 5 to 10 kt becoming north 10 to
15 kt. Waves 1 to 2 ft.
.THURSDAY NIGHT...North winds 5 to 10 kt. Waves 1 to 2 ft.
.FRIDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.FRIDAY NIGHT...West winds 10 to 15 kt becoming northwest. Waves
1 to 3 ft.
.SATURDAY...Northwest winds 10 to 15 kt becoming west 10 to
20 kt. Waves 1 to 2 ft.
.SUNDAY...West winds 10 to 20 kt becoming southwest. Waves 2 to
4 ft.

$$

LMZ761-292115-
MAFOR 2916/
MICHIGAN NORTH 12820 12710 13810 11710. A chance of rain showers
this afternoon. Waves 1 to 3 feet this afternoon. Waves 2 feet or
less tonight and Thursday morning.

MICHIGAN SOUTH 13820 11710 13700 11800. A chance of rain showers
this afternoon. Waves 1 to 3 feet building to 2 to 4 feet this
afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet tonight.
Waves 2 feet or less Thursday morning.

$$

Wagner

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

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