116
FZUS63 KMKX 250208
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
908 PM CDT Thu Sep 24 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 30.4 inches will linger over southern Ontario
Canada and the Great Lakes through Friday and into the weekend,
gradually weakening to 30.1 inches. Light east to southeast winds
expected at times, otherwise light and variable. Predominantly dry
and quiet weather expected.

High pressure will progress into the Ohio Valley early Tuesday,
allowing winds to turn south and increase as low pressure develops
in the central Plains.

LMZ261-362-364-366-563-565-567-868-250930-
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-
908 PM CDT Thu Sep 24 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Northeast winds 10 to 20 kt veering to south
10 to 15 kt. Waves 1 to 3 ft.
.FRIDAY...South winds 10 to 15 kt becoming southwest. Waves 1 to
3 ft subsiding to 1 to 2 ft.
.FRIDAY NIGHT...North winds 5 to 10 kt veering to east. Waves
1 to 2 ft.
.SATURDAY...East winds 5 to 10 kt. Waves 1 ft or less.
.SATURDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Waves
1 ft or less.
.SUNDAY...Southeast winds 5 to 10 kt. Waves 1 ft or less.
.SUNDAY NIGHT...Northeast winds 5 to 10 kt diminishing to less
than 10 kt. Waves nearly calm.
.MONDAY...Southeast winds 5 to 10 kt veering to south. Waves
nearly calm.
.TUESDAY...South winds 15 to 25 kt increasing to 30 kt. Waves
2 to 4 ft building to 4 to 7 ft occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-250930-
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-
908 PM CDT Thu Sep 24 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...East winds 5 to 10 kt increasing to 10 to
15 kt late this evening, then becoming southeast 10 to 20 kt
after midnight diminishing to 10 to 15 kt late. Waves 2 to 4 ft.
.FRIDAY...Southeast winds 10 to 15 kt becoming northeast. Waves
2 to 4 ft subsiding to 1 to 2 ft.
.FRIDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Waves
1 to 2 ft.
.SATURDAY...Southeast winds 5 to 10 kt becoming east. Waves 1 to
2 ft.
.SATURDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Waves
1 to 2 ft.
.SUNDAY...East winds 5 to 10 kt becoming northeast. Waves 1 ft or
less.
.SUNDAY NIGHT...North winds 5 to 10 kt becoming northeast. Waves
1 ft or less.
.MONDAY...East winds 5 to 10 kt becoming southeast. Waves 1 ft or
less.
.TUESDAY...South winds 15 to 25 kt increasing to 30 kt. Waves
3 to 5 ft building to 5 to 8 ft occasionally to 10 ft.

$$

LMZ761-250930-
MAFOR 2504/
MICHIGAN NORTH 11310 12410 12400 11500 11700 11100. Waves 1 to 3
feet overnight and Friday. Waves 1 foot or less Friday evening.

MICHIGAN SOUTH 14310 12200 12100. Waves 1 to 3 feet overnight and
Friday. Waves 1 foot or less Friday evening.

$$


Sheppard

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

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