427
FZUS63 KMKX 271345
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
845 AM CDT Sun Sep 27 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 will remain overhead through at least
Monday, keeping the weather dry and winds on the lighter side
early this week.

Breezy southerly winds are expected Tuesday into Thursday, as high
pressure departs to the east ahead of an approaching trough. Wind
gusts to 25 knots are possible along with building waves,
particularly across central and northern portions of the lake.

LMZ261-362-364-366-563-565-567-868-272115-
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-
845 AM CDT Sun Sep 27 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...East winds 5 to 10 kt backing to northwest.
Waves 1 to 2 ft.
.TONIGHT...Northwest winds 10 to 15 kt becoming north. Waves 1 to
2 ft.
.MONDAY...North winds 5 to 10 kt increasing to 10 to 15 kt. Waves
1 ft or less.
.MONDAY NIGHT...Northeast winds 10 to 15 kt veering to southeast
less than 10 kt overnight. Waves 1 ft or less.
.TUESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 ft or less building to 2 to 4 ft.
.TUESDAY NIGHT...South winds 10 to 20 kt. Waves 3 to 5 ft.
.WEDNESDAY...Southwest winds 10 to 20 kt becoming south. Chance
of showers. Waves 4 to 6 ft occasionally to 8 ft.
.THURSDAY...West winds 10 to 20 kt becoming northwest 15 to
25 kt. Chance of showers. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-272115-
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-
845 AM CDT Sun Sep 27 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Northeast winds 5 to 10 kt becoming north early
this afternoon, then becoming 10 to 20 kt late. Waves 1 to 2 ft.
.TONIGHT...North winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 1 to 3 ft.
.MONDAY...North winds 5 to 10 kt increasing to 10 to 15 kt. Waves
1 to 3 ft.
.MONDAY NIGHT...Northeast winds 10 to 15 kt veering to southeast
less than 10 kt overnight. Waves 1 to 2 ft.
.TUESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft building to 1 to 3 ft.
.TUESDAY NIGHT...South winds 10 to 20 kt. Waves 3 to 5 ft.
.WEDNESDAY...South winds 10 to 20 kt. Chance of showers. Waves
4 to 6 ft occasionally to 8 ft.
.THURSDAY...Southwest winds 10 to 20 kt becoming west. Showers
likely. Waves 2 to 4 ft.

$$

LMZ761-272115-
MAFOR 2716/
MICHIGAN NORTH 11800 12710 11810 14800. Waves 1 foot or less.

MICHIGAN SOUTH 11800 14810 11810 11800 11100. Waves 2 feet or
less.

$$


DDV

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

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