745
FZUS63 KMKX 281341
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
841 AM CDT Fri Aug 28 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 of 30.1 inches over the Great Lakes will gradually
shift southward today. Light south to southeast winds this
morning will pick up a bit for this afternoon, becoming southwest
tonight. Modest to breezy southerly winds will then prevail this
weekend and on Monday as a trough of low pressure slowly moves
from the Great Plains to the Upper Mississippi Valley. Rounds of
thunderstorms can be expected over Lake Michigan from Saturday
afternoon into Monday.

LMZ261-362-364-366-563-565-567-868-282115-
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-
841 AM CDT Fri Aug 28 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...South winds 5 to 10 kt increasing to 10 to
15 kt. Waves 1 to 2 ft.
.TONIGHT...South winds 10 to 15 kt becoming southwest 10 to
20 kt. Waves 1 to 3 ft.
.SATURDAY...Southwest winds 10 to 20 kt increasing to 30 kt.
Waves 2 to 4 ft.
.SATURDAY NIGHT...Southwest winds to 30 kt becoming south 15 to
25 kt. Chance of showers in the evening. Waves 2 to 4 ft building
to 4 to 6 ft occasionally to 8 ft.
.SUNDAY...South winds to 30 kt. Chance of showers. Waves 4 to
7 ft occasionally to 9 ft.
.SUNDAY NIGHT...Southeast winds 15 to 25 kt becoming south 10 to
20 kt. Chance of showers. Waves 4 to 6 ft occasionally to 8 ft
subsiding to 3 to 5 ft.
.MONDAY...South winds 15 to 25 kt. Chance of showers. Waves 3 to
5 ft.
.TUESDAY...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-282115-
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-
841 AM CDT Fri Aug 28 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Southeast winds 5 to 10 kt becoming south 10 to
15 kt. Waves 1 to 2 ft.
.TONIGHT...South winds 10 to 15 kt becoming southwest 10 to
20 kt. Waves 1 to 3 ft.
.SATURDAY...Southwest winds 10 to 20 kt becoming south 15 to
25 kt. Waves 2 to 4 ft.
.SATURDAY NIGHT...South winds 15 to 25 kt. Chance of showers.
Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.SUNDAY...South winds to 30 kt. Chance of showers in the
afternoon. Waves 4 to 7 ft occasionally to 9 ft.
.SUNDAY NIGHT...South winds 15 to 25 kt diminishing to 10 to
20 kt. Chance of showers. Waves 4 to 6 ft occasionally to 8 ft
subsiding to 3 to 5 ft.
.MONDAY...South winds 15 to 25 kt. Waves 3 to 5 ft.
.TUESDAY...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ761-282115-
MAFOR 2816/
MICHIGAN NORTH 15410 11510 11520. Waves 2 feet or less this
afternoon. Waves 1 to 3 feet tonight and Saturday morning.

MICHIGAN SOUTH 14410 11410 12510 11520. Waves 2 feet or less this
afternoon. Waves 1 to 3 feet tonight and Saturday morning.

$$


WFO MKX

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

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