592
FZUS63 KMKX 132058
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
258 PM CST Thu Nov 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...

High pressure of 30.3 inches over the mid Atlantic States will
continue to exit tonight as a low pressure trough around 29.5
approaches from the Northern Plains. Winds will become southerly
Friday and increase Friday night. The low will strengthen to 29.4
inches as it crosses Lake Superior Saturday morning. West to
northwest gales are looking more likely later Saturday into
Sunday behind the low and associated cold front. The gales look
lower-end, below 40 kt, and would be along the east half of Lake
Michigan.

LMZ261-362-364-366-563-565-567-868-140430-
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-
258 PM CST Thu Nov 13 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...West winds 10 to 20 kt diminishing to 10 to 15 kt late
this evening, then becoming northwest after midnight becoming
east late. Waves 2 to 4 ft subsiding to 1 to 2 ft.
.FRIDAY...Southeast winds 5 to 10 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt increasing to 15 to
25 kt. Waves 2 to 4 ft building to 4 to 6 ft occasionally to
8 ft.
.SATURDAY...Southwest winds 15 to 25 kt becoming northwest to
30 kt. Chance of showers. Waves 4 to 7 ft occasionally to 9 ft.
.SATURDAY NIGHT...Northwest gales to 40 kt. Chance of rain
showers in the evening, then chance of snow showers overnight.
Waves 6 to 9 ft occasionally to 12 ft.
.SUNDAY...Northwest gales to 35 kt. Chance of snow showers. Waves
5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.SUNDAY NIGHT...Northwest gales to 35 kt diminishing to 30 kt.
Chance of snow. Waves 4 to 7 ft occasionally to 9 ft.
.MONDAY...Northwest winds 15 to 25 kt diminishing to 10 to 20 kt.
Chance of snow. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.TUESDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-140430-
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-
258 PM CST Thu Nov 13 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Southwest winds 10 to 15 kt becoming south. Waves 1 to
3 ft.
.FRIDAY...South winds 10 to 15 kt. Waves 1 to 3 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt. Waves 2 to 4 ft building
to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...Southwest winds 15 to 25 kt becoming west. Waves 5 to
8 ft occasionally to 10 ft.
.SATURDAY NIGHT...Northwest gales to 35 kt. Waves 7 to 10 ft
occasionally to 13 ft building to 8 to 11 ft occasionally to
14 ft.
.SUNDAY...Northwest winds to 30 kt. Waves 8 to 11 ft occasionally
to 14 ft subsiding to 7 to 10 ft occasionally to 13 ft.
.SUNDAY NIGHT...Northwest winds to 30 kt. Waves 6 to 9 ft
occasionally to 12 ft.
.MONDAY...Northwest winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.TUESDAY...East winds 10 to 20 kt becoming northeast. Waves 3 to
5 ft.

$$

LMZ761-140430-
MAFOR 1323/
MICHIGAN NORTH 11620 11610 11600 11200 11300 13310. Waves 2 to 4
feet subsiding to 1 foot or less tonight. Waves 2 feet or less
Friday.

MICHIGAN SOUTH 13510 14410 11410. Waves 1 to 3 feet.

$$

MRC
Cronce

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

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