324
FZUS63 KMKX 090816
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
316 AM CDT Sat May 9 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 29.5 inches over Lake Superior will move east
today. A cold front with the low will move across Lake Michigan
this morning. South to southwest winds ahead of the front will
veer west to northwest today after the front moves through. Gusty
northwest winds are expected near the western shoreline this
afternoon. A backdoor cold front will sag southward across the
lake later this afternoon through tonight, with a brief period of
north winds behind it.

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 during
this period. Low pressure around 29.7 inches should then move east
southeast across the region Tuesday, with increasing south to
southeast winds ahead of it, veering west to northwest behind it
for Tuesday night into Wednesday.

LMZ261-362-364-366-563-565-567-868-091530-
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-
316 AM CDT Sat May 9 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Southwest winds 10 to 20 kt becoming west 15 to 25 kt.
Scattered sprinkles this morning, then scattered rain showers
this afternoon. Waves 4 to 6 ft occasionally to 8 ft subsiding to
2 to 4 ft.
.TONIGHT...North winds 15 to 25 kt diminishing to 10 to 20 kt
late in the evening, then becoming northwest 10 to 15 kt after
midnight becoming west late. Waves 2 to 4 ft subsiding to 1 to
2 ft.
.SUNDAY...West winds 10 to 15 kt becoming northwest 10 to 20 kt.
Waves 1 to 3 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 1 to 3 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 to 2 ft.
.TUESDAY...South winds 15 to 25 kt becoming southeast to 30 kt.
Rain showers. Waves 4 to 6 ft occasionally to 8 ft building to
6 to 9 ft occasionally to 12 ft.
.WEDNESDAY...North winds 15 to 25 kt increasing to 30 kt. Waves
4 to 7 ft occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-091530-
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-
316 AM CDT Sat May 9 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Southwest winds 15 to 25 kt becoming northwest.
Scattered sprinkles. Waves 4 to 6 ft occasionally to 8 ft
subsiding to 1 to 3 ft.
.TONIGHT...Northwest winds 10 to 20 kt becoming north 5 to 10 kt.
Waves 1 to 3 ft.
.SUNDAY...North winds 5 to 10 kt veering to east 10 to 15 kt.
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 2 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. Waves 4 to 6 ft occasionally to 8 ft building to 6 to
9 ft occasionally to 12 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt becoming north to 30 kt.
Waves 5 to 8 ft occasionally to 10 ft.

$$

LMZ761-091530-
MAFOR 0910/
MICHIGAN NORTH 11530 11620 12630 11730 11820 11810 11610. Waves 3
to 5 feet subsiding to 1 to 3 feet today. Waves 1 to 3 feet
tonight.

MICHIGAN SOUTH 11530 12620 11630 11720 11810 12800. Waves 3 to 5
feet subsiding to 1 to 3 feet today. Waves 1 to 2 feet tonight.

$$
Wood

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

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