600
FZUS63 KMKX 280832
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
332 AM CDT Mon Sep 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 will remain overhead through today,
keeping the weather dry and winds light out of the north

Breezy southerly winds are expected to build Tuesday afternoon and
continue into Thursday, as high pressure departs to the east
ahead of an approaching trough. Wind gusts to 30 knots are
possible Wednesday afternoon along with building waves,
particularly across central and northern portions of the lake.

LMZ261-362-364-366-563-565-567-868-281530-
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-
332 AM CDT Mon Sep 28 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...North winds 5 to 10 kt becoming northwest. Waves 1 ft or
less.
.TONIGHT...North winds 5 to 10 kt veering to southeast. Waves
1 ft or less.
.TUESDAY...South winds 5 to 10 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft building to 2 to 4 ft.
.TUESDAY NIGHT...South winds 10 to 20 kt. Waves 3 to 5 ft.
.WEDNESDAY...South winds 15 to 25 kt increasing to 30 kt. Chance
of showers in the morning, then showers likely in the afternoon.
Waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft
occasionally to 10 ft.
.WEDNESDAY NIGHT...South winds 15 to 25 kt becoming southwest.
Showers likely. Waves 5 to 8 ft occasionally to 10 ft subsiding
to 4 to 6 ft occasionally to 8 ft.
.THURSDAY...Southwest winds 15 to 25 kt becoming northwest to
30 kt. Chance of showers. Waves 4 to 6 ft occasionally to 8 ft.
.FRIDAY...Northwest winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-281530-
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-
332 AM CDT Mon Sep 28 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...North winds 5 to 10 kt increasing to 10 to 15 kt. Waves
1 to 2 ft.
.TONIGHT...North winds 10 to 15 kt becoming northeast late in the
evening, then becoming east after midnight veering to south late.
Waves 1 to 2 ft.
.TUESDAY...South winds 5 to 10 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.TUESDAY NIGHT...South winds 10 to 20 kt. Waves 2 to 4 ft
building to 3 to 5 ft.
.WEDNESDAY...South winds 15 to 25 kt. Chance of showers. Waves
4 to 7 ft occasionally to 9 ft building to 5 to 8 ft occasionally
to 10 ft.
.WEDNESDAY NIGHT...South winds 15 to 25 kt diminishing to 10 to
20 kt. Chance of showers. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 6 ft occasionally to 8 ft.
.THURSDAY...Southwest winds 15 to 25 kt becoming west. Showers
likely. Waves 4 to 6 ft occasionally to 8 ft.
.FRIDAY...North winds 10 to 20 kt. Waves 4 to 6 ft occasionally
to 8 ft.

$$

LMZ761-281530-
MAFOR 2810/
MICHIGAN NORTH 13800 12710 11800 11200 11300. Waves 1 foot or
less.

MICHIGAN SOUTH 11800 11100 11800 12810 12100 11300. Waves 2 feet
or less.

$$


CMiller

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

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