315
FZUS63 KMKX 150201
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
901 PM CDT Tue Oct 14 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...

High pressure of 30.5 inches over northern Minnesota will sink
southeastward into the Upper Great Lakes region through Thursday
morning. As this happens, breezy north winds will occur tonight,
with speeds easing going into Wednesday. Winds remain light going
into Thursday, but should come around to southeasterly and become
breezy again Thursday night into Friday morning as low pressure of
29.3 inches moves into south central Canada.

LMZ261-362-364-366-563-565-567-868-150930-
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-
901 PM CDT Tue Oct 14 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...North winds 10 to 20 kt becoming northeast
10 to 15 kt. Chance of showers. Waves 3 to 5 ft.
.WEDNESDAY...Northeast winds 5 to 10 kt becoming north 10 to
15 kt. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.WEDNESDAY NIGHT...North winds 10 to 15 kt becoming east. Waves
1 to 2 ft.
.THURSDAY...Southeast winds 10 to 15 kt becoming south 10 to
20 kt. Waves 1 to 3 ft building to 2 to 4 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt increasing to 15 to
25 kt. Showers likely. Waves 3 to 5 ft building to 5 to 8 ft
occasionally to 10 ft.
.FRIDAY...South winds to 30 kt. Chance of showers. Waves 6 to
9 ft occasionally to 12 ft building to 8 to 12 ft occasionally to
16 ft.
.FRIDAY NIGHT...South winds to 30 kt. Showers likely. Waves 8 to
11 ft occasionally to 14 ft subsiding to 6 to 9 ft occasionally
to 12 ft.
.SATURDAY...Southwest winds 15 to 25 kt. Showers likely. Waves
5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.SUNDAY...Northwest winds to 30 kt becoming west. Chance of
showers. Waves 4 to 7 ft occasionally to 9 ft building to 5 to
8 ft occasionally to 10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-150930-
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-
901 PM CDT Tue Oct 14 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...North winds 10 to 20 kt becoming northeast.
Slight chance of showers through early evening, then chance of
showers overnight. Waves 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Chance of showers in the morning. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 1 to 3 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt becoming east.
Waves 1 to 3 ft.
.THURSDAY...Southeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...Southeast winds 10 to 20 kt becoming south
15 to 25 kt. Chance of showers. Waves 3 to 5 ft building to 5 to
8 ft occasionally to 10 ft.
.FRIDAY...South winds to 30 kt. Chance of showers in the
afternoon. Waves 7 to 10 ft occasionally to 13 ft building to
8 to 11 ft occasionally to 14 ft.
.FRIDAY NIGHT...South winds to 30 kt diminishing to 15 to 25 kt.
Chance of showers. Waves 8 to 11 ft occasionally to 14 ft
subsiding to 6 to 9 ft occasionally to 12 ft.
.SATURDAY...Southwest winds 15 to 25 kt. Showers likely. Waves
5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.SUNDAY...Northwest winds to 30 kt becoming west gales to 35 kt.
Chance of showers. Waves 8 to 11 ft occasionally to 14 ft
building to 10 to 14 ft occasionally to 18 ft.

$$

LMZ761-150930-
MAFOR 1504/
MICHIGAN NORTH 11826 12110 12100 12810 11110. Waves 2 to 4 feet
overnight. Waves 1 to 3 feet subsiding to 1 foot or less
Wednesday. Waves 2 feet or less Wednesday evening.

MICHIGAN SOUTH 13120 11210 11100 13110. A chance of showers
overnight and Wednesday morning. Waves 3 to 6 feet overnight.
Waves 3 to 5 feet subsiding to 1 to 3 feet Wednesday. Waves 1 to
2 feet Wednesday 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