069
FZUS63 KMKX 290635
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
135 AM CDT Wed Jul 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...

Winds will diminish today as high pressure around 30.0 inches
builds into the Great lakes Region from Ontario. Light southwest
wind will develop Thursday through Friday as the high pressure
moves east toward the Mid Atlantic States. The departing high will
allow for returning thunderstorm chances Friday into Saturday.
Severe weather potential appears low at this time, though trends
will continue to be monitored.

LMZ261-362-364-366-563-565-567-868-291515-
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-
135 AM CDT Wed Jul 29 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...North winds 5 to 10 kt backing to southwest 10 to 15 kt.
Waves 1 to 2 ft.
.TONIGHT...Southwest winds 10 to 15 kt diminishing to 5 to 10 kt.
Waves 1 ft or less.
.THURSDAY...South winds 5 to 10 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt becoming southwest
10 to 15 kt. Waves 1 to 3 ft.
.FRIDAY...Southwest winds 10 to 15 kt increasing to 10 to 20 kt.
Chance of showers in the afternoon. Waves 1 to 2 ft.
.FRIDAY NIGHT...Southwest winds 10 to 15 kt veering to northeast.
Showers likely. Waves 1 to 2 ft.
.SATURDAY...Northeast winds 10 to 15 kt becoming north 10 to
20 kt. Chance of showers. Waves 1 to 3 ft.
.SUNDAY...Northeast winds 10 to 20 kt increasing to 30 kt. Waves
3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-291515-
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-
135 AM CDT Wed Jul 29 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...North winds 10 to 15 kt increasing to 10 to 20 kt. Waves
2 to 4 ft subsiding to 1 to 3 ft.
.TONIGHT...North winds 10 to 20 kt becoming northwest 5 to 10 kt.
Waves 1 to 3 ft subsiding to 1 ft or less.
.THURSDAY...Northwest winds 5 to 10 kt backing to southwest late
in the morning, then becoming south early in the afternoon
becoming 10 to 20 kt late. Waves 1 to 2 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt becoming southwest
10 to 15 kt. Waves 1 to 3 ft.
.FRIDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.
.FRIDAY NIGHT...East winds 10 to 20 kt. Showers likely. Waves
1 to 3 ft.
.SATURDAY...East winds 10 to 20 kt becoming northeast 15 to
25 kt. Chance of showers. Waves 2 to 4 ft.
.SUNDAY...Northeast winds 15 to 25 kt becoming north to 30 kt.
Waves 4 to 6 ft occasionally to 8 ft.

$$

LMZ761-291515-
MAFOR 2910/
MICHIGAN NORTH 12800 11710 12510 13500. Waves 1 foot or less.

MICHIGAN SOUTH 13810 13820 11800 11700. Waves 2 to 4 feet
subsiding to 1 to 3 feet today. Waves 2 feet or less tonight.

$$


Quigley

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

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