150
FZUS63 KMKX 051357
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
857 AM CDT Sun Oct 5 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...

Increasing southerly winds are expected across Lake Michigan
today, as strengthening low pressure around 29.3 inches tracks
from the eastern Dakotas into Ontario. The strongest winds will
be across the northern third of the open waters, where gale force
gusts are expected tonight. A Gale Warning is in effect for this
area.

Otherwise, the southern two-thirds of the lake will see southerly
gusts up to 30 knots today into tonight. Winds are expected to
shift to the southwest and gradually weaken into Monday morning,
ahead of an approaching cold front.

A northerly wind shift is expected through the day Monday behind
the cold front, and is progged to push south of Lake Michigan by
Monday night. High pressure around 30.4 inches looks to quickly
build in behind the cold front for Tuesday into Wednesday.

LMZ261-362-364-563-052115-
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 Rock Island Passage to Sturgeon Bay WI-
857 AM CDT Sun Oct 5 2025

STURGEON BAY WI TO POINT BETSIE MI NORTH...

...GALE WARNING IN EFFECT FROM 5 PM CDT THIS AFTERNOON THROUGH
LATE TONIGHT...

.REST OF TODAY...South winds 15 to 25 kt increasing to 30 kt.
Waves 4 to 6 ft occasionally to 8 ft building to 6 to 9 ft
occasionally to 12 ft.
.TONIGHT...South gales to 35 kt becoming southwest to 30 kt.
Showers likely with slight chance of thunderstorms overnight.
Waves 6 to 9 ft occasionally to 12 ft.
.MONDAY...Southwest winds 15 to 25 kt becoming northwest 10 to
20 kt late in the morning, then becoming north early in the
afternoon diminishing to 10 to 15 kt late. Showers likely in the
morning, then chance of showers in the afternoon. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft.
.MONDAY NIGHT...North winds 10 to 15 kt becoming northwest 5 to
10 kt. Chance of showers in the evening. Waves 1 to 3 ft.
.TUESDAY...Northwest winds 10 to 20 kt. Waves 1 to 2 ft building
to 1 to 3 ft.
.TUESDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 1 to 3 ft.
.WEDNESDAY...Northeast winds 5 to 10 kt increasing to 10 to
15 kt. Waves 1 to 2 ft.
.THURSDAY...South winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 3 to 5 ft.

$$

LMZ080-366-565-567-669-671-673-675-777-779-868-870-872-874-876-
878-052115-
Lake Michigan from Michigan City IN to St. Joseph MI 5 NM
offshore to Mid Lake-
Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to
Mid Lake-
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 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 Pentwater to Manistee MI 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 AM CDT Sun Oct 5 2025

STURGEON BAY WI TO POINT BETSIE MI SOUTH...

.REST OF TODAY...South winds 10 to 20 kt increasing to 30 kt.
Waves 4 to 6 ft occasionally to 8 ft building to 6 to 9 ft
occasionally to 12 ft.
.TONIGHT...South winds to 30 kt becoming southwest. Waves 6 to
9 ft occasionally to 12 ft.
.MONDAY...Southwest winds 15 to 25 kt diminishing to 10 to 20 kt
late in the morning, then becoming west early in the afternoon
becoming northwest 10 to 15 kt late. Chance of showers. Waves
4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.
.MONDAY NIGHT...North winds 10 to 15 kt increasing to 10 to
20 kt. Showers. Waves 2 to 4 ft.
.TUESDAY...North winds 10 to 20 kt. Chance of showers in the
morning. Waves 4 to 6 ft occasionally to 8 ft.
.TUESDAY NIGHT...North winds 10 to 20 kt becoming northeast.
Waves 3 to 5 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 3 to 5 ft.
.THURSDAY...Southeast winds 10 to 20 kt increasing to 15 to
25 kt. Waves 4 to 6 ft occasionally to 8 ft.

$$

LMZ761-052115-
MAFOR 0516/
MICHIGAN NORTH...GALE WARNING IN EFFECT...12440 13450 11550 11546
11626. Waves 3 to 5 feet building to 5 to 8 feet this afternoon.
Waves 5 to 9 feet subsiding to 4 to 7 feet tonight. Waves 3 to 6
feet Monday morning.

MICHIGAN SOUTH 14440 11440 11540 12530. A chance of showers
Monday morning. Waves 3 to 6 feet building to 5 to 8 feet this
afternoon. Waves 5 to 8 feet subsiding to 3 to 6 feet tonight.
Waves 3 to 6 feet Monday morning.

$$
Wood

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

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