673
FZUS63 KMKX 172038
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
238 PM CST Mon Nov 17 2025

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...

Low pressure of 29.8 inches will move from the Central Plains through
the central Mississippi Valley region tonight into tomorrow
afternoon. As this happens, light and variable winds overnight,
will come around to southeasterly and easterly through tomorrow
morning. Winds will become breezy over the southern half of the
lake as the low moves into the Ohio River Valley tomorrow evening.
Winds then ease Wednesday as high pressure of 30.3 inches moves
over the lake.

LMZ261-362-364-366-563-565-567-868-180415-
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-
238 PM CST Mon Nov 17 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...North winds 10 to 20 kt becoming northeast 10 to
15 kt. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.TUESDAY...Northeast winds 10 to 15 kt. Chance of rain. Waves
1 to 2 ft.
.TUESDAY NIGHT...Northeast winds 5 to 10 kt becoming north. Waves
1 to 2 ft.
.WEDNESDAY...South winds 5 to 10 kt becoming southwest. Waves
1 ft or less.
.WEDNESDAY NIGHT...South winds 10 to 15 kt becoming southwest.
Waves 1 to 2 ft.
.THURSDAY...Southwest winds 10 to 20 kt. Chance of rain in the
morning, then rain likely in the afternoon. Waves 2 to 4 ft.
.THURSDAY NIGHT...West winds 15 to 25 kt becoming northwest 10 to
20 kt. Chance of rain. Waves 2 to 4 ft.
.FRIDAY...Northwest winds 10 to 20 kt. Waves 2 to 4 ft.
.SATURDAY...West winds 10 to 20 kt becoming southwest. Waves 1 to
3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-180415-
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-
238 PM CST Mon Nov 17 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Northeast winds 5 to 10 kt becoming east late this
evening, then becoming southeast after midnight becoming 10 to
20 kt late. Rain overnight. Waves 1 to 3 ft.
.TUESDAY...East winds 10 to 20 kt. Rain in the morning, then
slight chance of rain in the afternoon. Waves 3 to 5 ft.
.TUESDAY NIGHT...East winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.WEDNESDAY...East winds 10 to 15 kt becoming southeast 5 to
10 kt. Waves 2 to 4 ft.
.WEDNESDAY NIGHT...South winds 5 to 10 kt becoming southwest.
Waves 1 to 2 ft.
.THURSDAY...Southwest winds 10 to 20 kt. Chance of rain in the
afternoon. Waves 2 to 4 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt becoming northwest.
Chance of rain. Waves 2 to 4 ft building to 3 to 5 ft.
.FRIDAY...Northwest winds 10 to 20 kt becoming north. Chance of
rain. Waves 4 to 6 ft occasionally to 8 ft.
.SATURDAY...Northeast winds 10 to 15 kt veering to southwest
10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ761-180415-
MAFOR 1723/
MICHIGAN NORTH 11720 13810 11110 12210 11110. A chance of rain
Tuesday. Waves 1 to 3 feet subsiding to 1 foot or less tonight.
Waves 2 feet or less Tuesday.

MICHIGAN SOUTH 11100 11200 11300 11316 13226 11220. Waves 1 to 3
feet tonight. Waves 2 to 4 feet building to 3 to 5 feet Tuesday.

$$


CMiller

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

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