116
FZUS63 KMKX 230257
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
857 PM 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...

Winds will shift northwest overnight with the passage of low
pressure around 29.6 inches and a cold front. Gusts up to 30 knots
are expected over the open waters.

High pressure around 30.1 inches briefly returns Sunday, with
northwest to west winds easing. Modest southerly winds will
develop Monday, as low pressure around 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 early Wednesday
morning. Timing and strength of this low remains uncertain, but a
period of gale force gusts is looking likely over Lake Michigan
Wednesday into Thursday.

LMZ261-362-364-366-563-565-567-868-231015-
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-
857 PM CST Sat Nov 22 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Southwest winds to 30 kt becoming northwest.
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 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.SUNDAY NIGHT...West winds 10 to 15 kt becoming southwest 10 to
20 kt. Waves 1 to 3 ft.
.MONDAY...Southwest winds 15 to 25 kt becoming south to 30 kt.
Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.
.MONDAY NIGHT...South winds 15 to 25 kt diminishing to 10 to
20 kt. Rain likely. Waves 4 to 6 ft occasionally to 8 ft.
.TUESDAY...South winds 10 to 20 kt diminishing to 10 to 15 kt.
Rain likely. Waves 3 to 5 ft.
.TUESDAY NIGHT...Southwest winds 15 to 25 kt increasing to 30 kt.
Rain. Waves 3 to 5 ft building to 6 to 9 ft occasionally to
12 ft.
.WEDNESDAY...West gales to 40 kt. Chance of snow. Waves 8 to
12 ft occasionally to 16 ft.
.THURSDAY...Northwest gales to 40 kt diminishing to gales to
35 kt. Chance of snow. Waves 8 to 11 ft occasionally to 14 ft
subsiding to 6 to 9 ft occasionally to 12 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-231015-
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-
857 PM CST Sat Nov 22 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Southwest winds to 30 kt becoming northwest
15 to 25 kt. Waves 5 to 8 ft occasionally to 10 ft.
.SUNDAY...Northwest winds 15 to 25 kt becoming west 10 to 15 kt.
Waves 5 to 8 ft occasionally to 10 ft subsiding to 3 to 5 ft.
.SUNDAY NIGHT...West winds 5 to 10 kt becoming southwest late in
the evening, then increasing to 10 to 15 kt after midnight
increasing to 10 to 20 kt late. Waves 2 to 4 ft subsiding to 1 to
3 ft.
.MONDAY...South winds 15 to 25 kt. Waves 4 to 6 ft occasionally
to 8 ft.
.MONDAY NIGHT...South winds 10 to 20 kt. Rain likely in the
evening, then rain overnight. Waves 4 to 6 ft occasionally to
8 ft subsiding to 3 to 5 ft.
.TUESDAY...South winds 10 to 15 kt becoming southwest. Rain
likely in the morning, then chance of rain in the afternoon.
Waves 3 to 5 ft.
.TUESDAY NIGHT...Southwest winds 10 to 20 kt becoming west to
30 kt. Chance of rain. Waves 3 to 5 ft building to 7 to 10 ft
occasionally to 13 ft.
.WEDNESDAY...West gales to 35 kt increasing to gales to 40 kt.
Chance of rain and snow. Waves 10 to 14 ft occasionally to 18 ft.
.THURSDAY...West winds to 30 kt becoming northwest. Waves 10 to
14 ft occasionally to 18 ft subsiding to 8 to 11 ft occasionally
to 14 ft.

$$

LMZ761-231015-
MAFOR 2305/
MICHIGAN NORTH 11630 11730 12740 11730 11630 11620 11510. Waves 3
to 6 feet overnight. Waves 3 to 6 feet subsiding to 2 to 4 feet
Sunday. Waves 2 feet or less Sunday evening.

MICHIGAN SOUTH 11630 12730 12720 12610 11500. Waves 3 to 6 feet
building to 4 to 7 feet overnight. Waves 4 to 7 feet subsiding to
2 to 4 feet Sunday. Waves 1 to 3 feet Sunday evening.

$$
Wood

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

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