931
FZUS63 KMKX 131347
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
847 AM CDT Sun Jul 13 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...

Modest southwest to west winds this morning will become south to
southwest this afternoon into Monday, as high pressure around 30.0
inches moves across the southern portions of the Great Lakes
region. Increasing southerly winds are expected Tuesday into
Wednesday, as a low pressure system around 29.7 inches develops
across the Central High Plains. This low should move toward and
across the region Wednesday night into Thursday night.

LMZ261-362-364-366-563-565-567-868-132130-
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-
847 AM CDT Sun Jul 13 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...West winds 10 to 15 kt becoming southwest 10 to
20 kt. Areas of smoke. Waves 1 to 2 ft.
.TONIGHT...Southwest winds 10 to 20 kt. Waves 1 to 3 ft.
.MONDAY...Southwest winds 10 to 20 kt. Waves 1 to 3 ft.
.MONDAY NIGHT...South winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 2 ft.
.TUESDAY...South winds 10 to 20 kt. Waves 1 to 3 ft.
.TUESDAY NIGHT...South winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 1 to 3 ft.
.WEDNESDAY...Southwest winds 10 to 20 kt. Chance of showers.
Waves 1 to 3 ft.
.THURSDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-132130-
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-
847 AM CDT Sun Jul 13 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Northwest winds 5 to 10 kt backing to southwest
10 to 15 kt. Areas of smoke this afternoon. Waves 1 to 2 ft.
.TONIGHT...South winds 5 to 10 kt becoming southwest. Areas of
smoke in the evening. Waves 1 to 2 ft.
.MONDAY...Southwest winds 10 to 15 kt becoming south. Waves 1 to
2 ft.
.MONDAY NIGHT...South winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 2 ft.
.TUESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.TUESDAY NIGHT...Southeast winds 10 to 15 kt becoming south.
Waves 1 to 3 ft.
.WEDNESDAY...Southwest winds 10 to 15 kt becoming south 10 to
20 kt. Chance of showers. Waves 1 to 3 ft.
.THURSDAY...Northwest winds 10 to 20 kt becoming north. Waves
3 to 5 ft.

$$

LMZ761-132130-
MAFOR 1316/
MICHIGAN NORTH 16520. Waves 2 feet or less this afternoon. Waves
1 to 3 feet tonight and Monday morning.

MICHIGAN SOUTH 11610 11510 12400 11500 13510. Waves 1 foot or
less.

$$
Wood

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

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