523
FZUS63 KMKX 131407
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
907 AM CDT Tue Oct 13 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...

West to northwest winds are expected today, remaining breezy as
low pressure departs east. Light north winds expected tonight
night, with isolated thunderstorms possible across far southern
portions of the lake. Northerly winds continue Wednesday as high
pressure moves eastward over the northern half of the lake, then
easterly into Wednesday night as high pressure moves eastward.
Winds weaken into Thursday as low pressure moves east through the
Mississippi Valley, then become northwesterly gales late Thursday
night into Friday as low pressure moves into the eastern Great
Lakes and intensifies. A few storm force gusts are possible
Friday.

LMZ261-362-364-366-563-565-567-868-132130-
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-
907 AM CDT Tue Oct 13 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...West winds 10 to 20 kt becoming northwest.
Patchy fog through mid morning. Chance of showers through mid
morning. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.
.TONIGHT...North winds 10 to 20 kt. Waves 1 to 3 ft.
.WEDNESDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.
.WEDNESDAY NIGHT...North winds 10 to 20 kt becoming northeast.
Waves 2 to 4 ft.
.THURSDAY...Southeast winds 10 to 15 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...Southwest winds 10 to 15 kt becoming northwest
gales to 35 kt. Rain showers likely. Waves 1 to 2 ft building to
6 to 9 ft occasionally to 12 ft.
.FRIDAY...Northwest gales to 45 kt. Chance of rain showers. Waves
14 to 18 ft occasionally to 23 ft.
.SATURDAY...West winds 10 to 20 kt becoming southwest to 30 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-132130-
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-
907 AM CDT Tue Oct 13 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...West winds 10 to 20 kt becoming northwest 10 to
15 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to
4 ft.
.TONIGHT...North winds 5 to 10 kt becoming northeast. Chance of
showers and slight chance of thunderstorms. Waves 1 to 3 ft
subsiding to 1 to 2 ft.
.WEDNESDAY...Northeast winds 10 to 15 kt becoming north 10 to
20 kt. Waves 1 to 3 ft building to 4 to 6 ft occasionally to
8 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 kt becoming east.
Waves 4 to 6 ft occasionally to 8 ft.
.THURSDAY...East winds 10 to 20 kt. Chance of showers in the
morning, then showers likely in the afternoon. Waves 4 to 6 ft
occasionally to 8 ft.
.THURSDAY NIGHT...Northeast winds 10 to 15 kt backing to
northwest gales to 35 kt. Showers likely. Waves 2 to 4 ft
building to 7 to 10 ft occasionally to 13 ft.
.FRIDAY...Northwest gales to 45 kt. Chance of showers. Waves
18 to 23 ft occasionally to 30 ft.
.SATURDAY...Northwest winds 10 to 20 kt becoming southwest 15 to
25 kt. Waves 6 to 9 ft occasionally to 12 ft subsiding to 3 to
5 ft.

$$

&&STORM

LMZ761-132130-
MAFOR 1316/
MICHIGAN NORTH 12720 12820 13810 11820. Waves 3 to 5 feet
subsiding to 1 to 3 feet this afternoon. Waves 1 to 3 feet
tonight. Waves 2 feet or less Wednesday morning.

MICHIGAN SOUTH 11620 11720 11800 13100 12110. A chance of showers
tonight. Waves 3 to 5 feet subsiding to 2 to 4 feet this
afternoon. Waves 1 to 3 feet tonight and Wednesday morning.

$$


DDV

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

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