932
FZUS63 KMKX 110758
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
258 AM CDT Fri Sep 11 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 around 30.0 inches will continue to produce light
and variable winds into this morning before shifting eastward,
allowing southwesterly winds to increase as low pressure around
29.2 inches moves through Ontario into the Hudson Bay. A few gusts
up to gale force are possible tonight into Saturday in the
northern third of the open waters. Low pressure will drag a weak
cold front across the Lake on Saturday, shifting winds to the
west-northwest by Saturday night. Winds gradually diminish
through Sunday as high pressure around 30.2 inches builds across
the northern Plains and into the Great Lakes. Another area of low
pressure then develops across the Canadian Plains and tracks
across Ontario for Monday through Tuesday. This will bring a
return of increasing south-southwesterly wind over Lake Michigan
ahead of this systems cold front, with northwesterly winds behind
the front. Gales are possible Monday into Monday night as the low
makes its closest approach.

LMZ261-362-364-366-563-565-567-868-111515-
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 AM CDT Fri Sep 11 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Southwest winds 10 to 20 kt becoming south to 30 kt.
Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.TONIGHT...South winds to 30 kt diminishing to 15 to 25 kt. Waves
4 to 6 ft occasionally to 8 ft.
.SATURDAY...South winds to 30 kt becoming southwest. Waves 4 to
7 ft occasionally to 9 ft subsiding to 4 to 6 ft occasionally to
8 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt. Waves 3 to 5 ft.
.SUNDAY...Northwest winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 1 to 3 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt becoming northeast. Waves
1 to 3 ft.
.MONDAY...East winds to 30 kt becoming southeast. Chance of
showers. Waves 4 to 6 ft occasionally to 8 ft building to 6 to
9 ft occasionally to 12 ft.
.TUESDAY...West gales to 35 kt diminishing to 30 kt. Waves 10 to
14 ft occasionally to 18 ft subsiding to 5 to 8 ft occasionally to
10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-111515-
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 AM CDT Fri Sep 11 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Southeast winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 2 to 4 ft.
.TONIGHT...Southeast winds 10 to 20 kt becoming south 15 to
25 kt. Waves 2 to 4 ft.
.SATURDAY...South winds 15 to 25 kt becoming southwest 10 to
20 kt. Waves 4 to 6 ft occasionally to 8 ft.
.SATURDAY NIGHT...West winds 10 to 20 kt becoming north. Waves
3 to 5 ft.
.SUNDAY...North winds 10 to 20 kt. Waves 3 to 5 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt becoming northeast. Waves
2 to 4 ft.
.MONDAY...East winds to 30 kt becoming southeast gales to 35 kt.
Chance of showers. Waves 4 to 7 ft occasionally to 9 ft building
to 7 to 10 ft occasionally to 13 ft.
.TUESDAY...Southwest gales to 35 kt becoming northwest 15 to
25 kt. Chance of showers. Waves 10 to 14 ft occasionally to 18 ft
subsiding to 5 to 8 ft occasionally to 10 ft.

$$

LMZ761-111515-
MAFOR 1110/
MICHIGAN NORTH 12520 15430. Waves 1 to 3 feet building to 3 to 6
feet today. Waves 3 to 6 feet tonight.

MICHIGAN SOUTH 12310 14320 11420 11430. Waves 1 to 3 feet
building to 2 to 4 feet today. Waves 2 to 4 feet tonight.

$$


WFO MKX

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

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