055
FZUS63 KMKX 270158
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
858 PM CDT Sat Sep 26 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...

High pressure of 30.3 inches centered near the James Bay will
gradually move east into Sunday while a second high pressure
around 30.1 inches across the western Great Lakes Region remains
near stationary through Monday. Therefore, dry weather and light
winds are expected into early next week.

Breezy southerly winds are expected Tuesday through Thursday next
week, as high pressure departs to the east ahead of an approaching
trough. Wind gust to 25 knots are possible along with building
waves, particularly across central and northern portions of the
lake.

LMZ261-362-364-366-563-565-567-868-270915-
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-
858 PM CDT Sat Sep 26 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Northeast winds 5 to 10 kt veering to
southeast. Waves 1 ft or less.
.SUNDAY...Southeast winds less than 10 kt backing to northeast
late in the morning, then becoming northwest early in the
afternoon increasing to 10 to 15 kt late. Waves 1 ft or less.
.SUNDAY NIGHT...Northwest winds 10 to 15 kt becoming north. Waves
1 to 2 ft.
.MONDAY...North winds 5 to 10 kt increasing to 10 to 15 kt. Waves
1 ft or less.
.MONDAY NIGHT...Northeast winds 5 to 10 kt veering to south.
Waves 1 ft or less.
.TUESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 ft or less building to 1 to 3 ft.
.TUESDAY NIGHT...South winds 10 to 20 kt. Chance of showers.
Waves 3 to 5 ft.
.WEDNESDAY...Southwest winds 10 to 20 kt becoming south. Chance
of showers. Waves 3 to 5 ft.
.THURSDAY...Southwest winds 10 to 20 kt increasing to 30 kt.
Chance of showers. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-270915-
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-
858 PM CDT Sat Sep 26 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northeast winds 5 to 10 kt becoming east.
Waves 1 ft or less.
.SUNDAY...Northeast winds less than 10 kt increasing to 5 to
10 kt late in the morning, then becoming north early in the
afternoon increasing to 10 to 15 kt late. Waves 1 to 2 ft.
.SUNDAY NIGHT...North winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 3 ft.
.MONDAY...Northeast winds 5 to 10 kt becoming north. Waves 1 to
2 ft.
.MONDAY NIGHT...Northeast winds 10 to 15 kt veering to southeast
less than 10 kt overnight. Waves 1 to 2 ft.
.TUESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft building to 1 to 3 ft.
.TUESDAY NIGHT...South winds 10 to 20 kt. Waves 3 to 5 ft.
.WEDNESDAY...South winds 10 to 20 kt. Chance of showers. Waves
3 to 5 ft.
.THURSDAY...Southwest winds 10 to 20 kt. Showers likely. Waves
2 to 4 ft.

$$

LMZ761-270915-
MAFOR 2704/
MICHIGAN NORTH 11200 12300 11200 11700 12710 11810. Waves 1 foot
or less.

MICHIGAN SOUTH 13200 11100 11800 13810. Waves 2 feet or less.

$$


Patterson

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

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