475
FZUS63 KMKX 011904
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
204 PM CDT Thu Oct 1 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...

Showers & a few rumbles of thunder will continue across the southern
half of Lake Michigan into this afternoon ahead of an approaching
cold front. The front will work across the waters this afternoon &
evening, bringing a north-northwest wind shift. Winds will be breezy
behind the front, though gales are not expected. 30.2 inch high
pressure will move across Lake Michigan Friday afternoon into
Saturday, bringing decreasing & eventually light/variable winds.
Winds will trend south-southwesterly Saturday as 29.8 inch low
pressure moves toward the Hudson Bay from the Canadian Prairies.
The low will pull a cold front across the waters Saturday night
into Sunday, bringing a west-northwest wind shift. Showers could
accompany the passing front, particularly across the northern half
of the waters. Northwest winds will continue through the day
Monday, tapering Monday night as 30.2 inch high pressure moves in
from the northern Great Plains.

A deeper area of 29.4 inch low pressure will build toward the
Hudson Bay Tuesday through Thursday. South-southwest winds will
increase in advance of the approaching low Tuesday afternoon
through Wednesday, becoming gusty at times. While not currently
expected to be widespread, a few gusts could approach gale-force.
Will be monitoring for possible upward trends as this portion of
the period draws closer. The low will pull a cold front across the
waters Wednesday night into Thursday, bringing a northwest wind
shift and scattered rain showers.

LMZ261-362-364-366-563-565-567-868-020315-
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-
204 PM CDT Thu Oct 1 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

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

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-020315-
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-
204 PM CDT Thu Oct 1 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...North winds 10 to 20 kt increasing to 15 to 25 kt.
Patchy fog this evening. Chance of showers. Waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft.
.FRIDAY...North winds 15 to 25 kt. Waves 4 to 7 ft occasionally
to 9 ft.
.FRIDAY NIGHT...North winds 10 to 20 kt veering to east 10 to
15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft.
.SATURDAY...Southeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 2 to 4 ft.
.SATURDAY NIGHT...Southeast winds 10 to 20 kt becoming southwest.
Waves 3 to 5 ft.
.SUNDAY...West winds 10 to 20 kt becoming northwest. Waves 3 to
5 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt. Waves 2 to 4 ft building
to 3 to 5 ft.
.MONDAY...North winds 10 to 20 kt. Waves 3 to 5 ft.
.TUESDAY...South winds 10 to 20 kt increasing to 30 kt. Waves
2 to 4 ft building to 4 to 7 ft occasionally to 9 ft.

$$

LMZ761-020315-
MAFOR 0122/
MICHIGAN NORTH 13820 13720 12730. Waves 1 to 3 feet building to 2
to 4 feet tonight. Waves 3 to 5 feet subsiding to 2 to 4 feet
Friday.

MICHIGAN SOUTH 11826 12820 14830 11830. Waves 1 to 3 feet
building to 3 to 5 feet tonight. Waves 3 to 6 feet Friday.

$$


Quigley

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

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