555
FZUS63 KMKX 221425
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
825 AM CST Sat Nov 22 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 around 30.1 inches will cross southern Lake Michigan
this morning. Expect breezy southwest winds to develop this
afternoon as weak low pressure of 29.7 inches progresses through
Lake Superior. Winds shift northwesterly tonight with the passage
of a cold front. Gusts up to 30 kt are expected over the open
lake.

High pressure around 30.1 inches briefly returns Sunday. Modest
southerly winds will develop Monday as low pressure of 28.7
inches moves into the Upper Mississippi River Valley. The low will
strengthen over Minnesota and Wisconsin on Tuesday and cross Lake
Superior as a 29.4 inch low Wednesday morning. Timing and
strength of this low remain uncertain, but a period of gale force
gusts is looking likely over Lake Michigan Wednesday into Thursday
morning.

LMZ261-362-364-366-563-565-567-868-222215-
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-
825 AM CST Sat Nov 22 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...West winds 5 to 10 kt becoming southwest 10 to
15 kt late this morning, then increasing to 15 to 25 kt early
this afternoon becoming south to 30 kt late. Slight chance of
rain this afternoon. Waves 1 ft or less building to 4 to 7 ft
occasionally to 9 ft.
.TONIGHT...Southwest winds to 30 kt veering to northwest. Chance
of rain in the evening. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 7 ft occasionally to 9 ft.
.SUNDAY...Northwest winds to 30 kt becoming west 10 to 20 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.
.SUNDAY NIGHT...West winds 10 to 15 kt becoming southwest 10 to
20 kt. Waves 1 to 3 ft.
.MONDAY...Southwest winds 10 to 20 kt becoming south. Waves 2 to
4 ft building to 4 to 6 ft occasionally to 8 ft.
.MONDAY NIGHT...South winds 10 to 20 kt. Rain. Waves 4 to 7 ft
occasionally to 9 ft.
.TUESDAY...South winds 10 to 20 kt becoming southwest. Rain
likely. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft.
.WEDNESDAY...West gales to 35 kt increasing to gales to 40 kt.
Chance of rain and snow. Waves 6 to 9 ft occasionally to 12 ft
building to 7 to 10 ft occasionally to 13 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-222215-
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-
825 AM CST Sat Nov 22 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...East winds 5 to 10 kt veering to south late this
morning, then becoming 10 to 20 kt early this afternoon becoming
southwest to 30 kt late. Waves 1 to 2 ft building to 4 to 6 ft
occasionally to 8 ft.
.TONIGHT...Southwest winds 15 to 25 kt veering to northwest.
Waves 5 to 8 ft occasionally to 10 ft.
.SUNDAY...Northwest winds 15 to 25 kt becoming west 10 to 20 kt.
Waves 5 to 8 ft occasionally to 10 ft subsiding to 3 to 5 ft.
.SUNDAY NIGHT...Southwest winds 5 to 10 kt increasing to 10 to
15 kt. Waves 2 to 4 ft.
.MONDAY...South winds 10 to 20 kt. Waves 4 to 6 ft occasionally
to 8 ft.
.MONDAY NIGHT...South winds 10 to 20 kt increasing to 15 to
25 kt. Rain. Waves 4 to 7 ft occasionally to 9 ft.
.TUESDAY...South winds 10 to 20 kt becoming southwest. Rain
likely. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft.
.WEDNESDAY...West gales to 40 kt increasing to gales to 45 kt.
Chance of rain and snow. Waves 8 to 11 ft occasionally to 14 ft.

$$

LMZ761-222215-
MAFOR 2217/
MICHIGAN NORTH 11520 11440 11540 11640 13740 11730. A chance of
rain this evening. Waves 1 foot or less building to 3 to 6 feet
this afternoon. Waves 4 to 7 feet subsiding to 3 to 6 feet
tonight. Waves 3 to 6 feet Sunday morning.

MICHIGAN SOUTH 11420 11430 11530 12630 13730. Waves 1 foot or
less building to 3 to 6 feet this afternoon. Waves 5 to 8 feet
tonight and Sunday morning.

$$


Boxell

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

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