585
FZUS63 KMKX 071935
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
235 PM CDT Mon Sep 7 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 30.2 inches will remain over the lower
Great Lakes through Tuesday. Meanwhile, low pressure around
29.6 inches over the northern High Plains will lift northward
through the Canadian Prairies into Tuesday morning. This will
allow for gradually increasing southerly winds late tonight
through Tuesday night especially over the north half. As low
pressure enters the Hudson Bay late Tuesday night and Wednesday,
winds shift southwesterly, then westerly on Wednesday as a cold
front pushes southeastward through the Lake. Winds become
northwesterly behind the front, gradually weakening through
Thursday and Thursday night. Winds shift to southerly again and
increase into Friday as low pressure develops in the northern
Plains.

LMZ261-362-364-366-563-565-567-868-080430-
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-
235 PM CDT Mon Sep 7 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...South winds 5 to 10 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.TUESDAY...South winds 10 to 20 kt increasing to 30 kt. Slight
chance of showers in the morning, then chance of showers and
slight chance of thunderstorms in the afternoon. Waves 3 to 5 ft.
.TUESDAY NIGHT...South winds to 25 kt becoming southwest. Showers
likely in the evening, then showers likely with a chance of
thunderstorms overnight. Waves 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...Southwest winds to 25 kt. Chance of showers and
thunderstorms in the morning. Waves 4 to 7 ft occasionally to 9
ft.
.WEDNESDAY NIGHT...West winds to 20 to 30 kt becoming northwest.
Waves 4 to 6 ft occasionally to 8 ft.
.THURSDAY...Northwest winds 10 to 20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...Southwest winds 10 to 15 kt becoming south.
Waves 1 to 2 ft.
.FRIDAY...South winds 15 to 25 kt increasing to 30 kt. Waves 2 to
4 ft building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...Southwest winds to 30 kt. Waves 4 to 7 ft
occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-080430-
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-
235 PM CDT Mon Sep 7 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...East winds 10 to 15 kt becoming southeast 10 to 20 kt.
Waves 2 to 4 ft.
.TUESDAY...South winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 3 to 5 ft.
.TUESDAY NIGHT...South winds 15 to 25 kt becoming southwest 10 to
20 kt. Chance of showers and thunderstorms overnight. Waves 3 to
5 ft.
.WEDNESDAY...Southwest winds 15 to 25 kt. Showers likely in the
morning, then chance of showers in the afternoon. Waves 4 to 7 ft
occasionally to 9 ft.
.WEDNESDAY NIGHT...West winds 15 to 25 kt becoming northwest.
Waves 4 to 6 ft occasionally to 8 ft.
.THURSDAY...Northwest winds 10 to 20 kt becoming north. Waves
3 to 5 ft.
.THURSDAY NIGHT...North winds 5 to 10 kt veering to southeast
10 to 15 kt. Waves 1 to 3 ft.
.FRIDAY...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. Waves 4 to 7 ft
occasionally to 9 ft.

$$

LMZ761-080430-
MAFOR 0722/
MICHIGAN NORTH 11410 11400 11310 13420 12430. A chance of showers
Tuesday afternoon. Waves 2 feet or less tonight. Waves 1 to 3
feet building to 3 to 5 feet Tuesday.

MICHIGAN SOUTH 12210 11310 11320 13420 11430. Waves 1 to 3 feet
tonight. Waves 1 to 3 feet building to 2 to 4 feet Tuesday.

$$


Gehring

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

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