015
FZUS63 KMKX 071942
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
242 PM CDT Tue Oct 7 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...

Breezy north to northwesterly winds across the lake will continue
ahead of an area of high pressure that will build in from the
Plains tonight. This high pressure around 30.4 inches will move
across WI Wednesday and settle over the Great Lakes Region through
the second half of the week. Southerly winds will continue until
Thursday morning when they turn to easterly and eventually
southeasterly by Thursday night. Southerly winds will increase
heading becoming breezy Friday as the high pressure continues to
pull east and low pressure around 29.8 inches advances from the
Northern Plains.

LMZ261-362-364-366-563-565-567-868-072130-
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-
242 PM CDT Tue Oct 7 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Northwest winds 10 to 20 kt. Waves 2 to 4 ft.
.TONIGHT...Northwest winds 15 to 25 kt becoming north 10 to
20 kt. Waves 3 to 5 ft.
.WEDNESDAY...North winds 10 to 15 kt. Waves 2 to 4 ft subsiding
to 1 to 3 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt becoming
southeast. Waves 1 to 2 ft.
.THURSDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 2 to 4 ft building to 3 to 5 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt becoming southwest
15 to 25 kt. Waves 3 to 5 ft.
.FRIDAY...Southwest winds 15 to 25 kt. Waves 3 to 5 ft.
.SATURDAY...East winds 10 to 15 kt becoming southeast. Waves 1 to
3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-072130-
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-
242 PM CDT Tue Oct 7 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...North winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 4 to 6 ft occasionally to 8 ft.
.TONIGHT...North winds 10 to 20 kt. Waves 4 to 6 ft occasionally
to 8 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt becoming north 10 to
15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt becoming east.
Waves 2 to 4 ft.
.THURSDAY...Southeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 3 to 5 ft.
.THURSDAY NIGHT...Southeast winds 10 to 20 kt becoming south.
Waves 3 to 5 ft.
.FRIDAY...Southwest winds 10 to 20 kt becoming south. Waves 3 to
5 ft.
.SATURDAY...South winds 10 to 15 kt becoming southeast. Waves
2 to 4 ft.

$$

LMZ761-072130-
MAFOR 0716/
MICHIGAN NORTH 12720 11730 12830 11820 12810. Waves 1 to 3 feet
this afternoon. Waves 2 to 4 feet tonight. Waves 1 to 3 feet
Wednesday morning.

MICHIGAN SOUTH 12830 11820 13830 12120. Waves 3 to 6 feet this
afternoon. Waves 3 to 5 feet tonight and Wednesday morning.

$$


Patterson

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

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