460
FZUS63 KMKX 081940
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
240 PM CDT Fri May 8 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...

Low pressure around 29.6 inches along the Minnesota and Canadian
border will move across Lake Superior tonight. Its cold front will
move across Lake Michigan Saturday morning. Modest to breezy
south winds will develop this afternoon before shifting southwest
late tonight, and west on Saturday with the cold frontal passage.
Another cold front will then shift the winds to northerly Saturday
night. High pressure around 30.3 inches is then expected to move
from southern Manitoba on Sunday to over Lake Michigan by Monday
afternoon. Relatively light and variable winds are expected early
next week.

LMZ261-362-364-366-563-565-567-868-090315-
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-
240 PM CDT Fri May 8 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...South winds 15 to 25 kt becoming southwest. Slight
chance of rain showers. Waves 3 to 5 ft.
.SATURDAY...West winds 10 to 20 kt becoming northwest. Slight
chance of rain showers in the afternoon. Waves 3 to 5 ft
subsiding to 1 to 3 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt becoming west 10 to
15 kt. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.SUNDAY...West winds 10 to 20 kt becoming northwest. Waves 1 to
3 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 1 to 2 ft.
.MONDAY...Northwest winds 10 to 15 kt backing to southwest. Waves
1 to 2 ft.
.MONDAY NIGHT...South winds 10 to 15 kt becoming southeast. Waves
1 ft or less.
.TUESDAY...South winds 15 to 25 kt becoming southeast to 30 kt.
Chance of rain showers. Waves 3 to 5 ft building to 5 to 8 ft
occasionally to 10 ft.
.WEDNESDAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-090315-
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-
240 PM CDT Fri May 8 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...South winds 15 to 25 kt becoming southwest. Waves 3 to
5 ft.
.SATURDAY...Southwest winds 10 to 20 kt becoming west. Slight
chance of rain showers in the afternoon. Waves 2 to 4 ft
subsiding to 1 to 3 ft.
.SATURDAY NIGHT...Northwest winds 10 to 15 kt becoming north 5 to
10 kt. Waves 1 to 3 ft.
.SUNDAY...North winds 10 to 15 kt becoming northeast. Waves 1 to
2 ft.
.SUNDAY NIGHT...North winds 5 to 10 kt becoming northeast. Waves
1 to 2 ft.
.MONDAY...Northeast winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.MONDAY NIGHT...East winds 10 to 15 kt becoming southeast. Waves
1 to 2 ft.
.TUESDAY...South winds 15 to 25 kt increasing to 30 kt. Rain
showers likely. Waves 3 to 5 ft building to 5 to 8 ft
occasionally to 10 ft.
.WEDNESDAY...North winds 15 to 25 kt increasing to 30 kt. Waves
4 to 6 ft occasionally to 8 ft.

$$

LMZ761-090315-
MAFOR 0822/
MICHIGAN NORTH 14430 11520 13620. Waves 2 to 4 feet tonight.
Waves 2 to 4 feet subsiding to 1 to 3 feet Saturday.

MICHIGAN SOUTH 13430 11530 11520 13620. Waves 1 to 3 feet
building to 2 to 4 feet tonight. Waves 2 to 4 feet subsiding to 1
to 3 feet Saturday.

$$


Gehring

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

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