266
FZUS63 KMKX 061406
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
906 AM CDT Mon Oct 6 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...

A Canadian cold front over the north half of Lake Michigan will
slowly progress southward, reaching the southern tip of Lake
Michigan by early evening. Modest southwesterly winds will turn
northerly behind the cold front passage and last through Tuesday
night. The northerly winds will become breezy during this time
over the south half of the lake with building waves. High
pressure builds to around 30.4 inches into the Upper Midwest
Tuesday and settles over the Great Lakes Region through midweek
resulting in lighter, varying winds. Increasing southerly winds
return for the end of the week as the high pressure gradually
slides further east.

LMZ261-362-364-366-563-565-567-868-062130-
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-
906 AM CDT Mon Oct 6 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...West winds 10 to 20 kt veering to north 10 to
15 kt. Showers likely through mid morning, then chance of showers
this afternoon. Waves 4 to 6 ft occasionally to 8 ft subsiding to
3 to 5 ft.
.TONIGHT...North winds 10 to 15 kt becoming northwest. Chance of
showers. Waves 2 to 4 ft.
.TUESDAY...Northwest winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 2 to 4 ft.
.TUESDAY NIGHT...North winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 2 to 4 ft.
.WEDNESDAY...North winds 10 to 15 kt. Waves 2 to 4 ft subsiding
to 1 to 2 ft.
.WEDNESDAY NIGHT...East winds 5 to 10 kt becoming southeast.
Waves 1 to 2 ft.
.THURSDAY...South winds 10 to 20 kt. Waves 2 to 4 ft.
.FRIDAY...Southwest winds 10 to 20 kt. Waves 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-062130-
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-
906 AM CDT Mon Oct 6 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Southwest winds 10 to 20 kt becoming northwest
10 to 15 kt late. Chance of showers and slight chance of
thunderstorms this afternoon. Waves 4 to 6 ft occasionally to 8 ft
subsiding to 3 to 5 ft.
.TONIGHT...North winds 10 to 15 kt increasing to 10 to 20 kt.
Showers likely with a chance of thunderstorms in the evening,
then showers likely with slight chance of thunderstorms
overnight. Waves 2 to 4 ft building to 4 to 6 ft occasionally to
8 ft.
.TUESDAY...North winds 15 to 25 kt. Chance of showers in the
morning. Waves 5 to 8 ft occasionally to 10 ft.
.TUESDAY NIGHT...North winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt becoming
southeast. Waves 2 to 4 ft.
.THURSDAY...Southeast winds 10 to 20 kt. Waves 2 to 4 ft.
.FRIDAY...Southwest winds 10 to 20 kt becoming south. Waves 2 to
4 ft.

$$

LMZ761-062130-
MAFOR 0616/
MICHIGAN NORTH 14810 11810 12710 11720. A chance of showers this
afternoon and tonight. Waves 3 to 5 feet subsiding to 2 to 4 feet
this afternoon. Waves 1 to 3 feet tonight and Tuesday morning.

MICHIGAN SOUTH 11520 11610 12816 13826 11830. A chance of
thunderstorms this evening. Waves 3 to 5 feet subsiding to 2 to 4
feet this afternoon. Waves 1 to 3 feet building to 3 to 6 feet
tonight. Waves 4 to 7 feet Tuesday morning.

$$


Gehring

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

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