596
FZUS63 KMKX 051957
GLFLM

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

Gusty south winds are expected across Lake Michigan into tonight,
as strengthening low pressure around 29.3 inches moves northeast
into Ontario. The strongest winds will be across the northern
third of the open waters, where gale force gusts are expected. A
Gale Warning remains in effect for this area.

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

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

LMZ261-362-364-563-060315-
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-
257 PM CDT Sun Oct 5 2025

STURGEON BAY WI TO POINT BETSIE MI NORTH...

...GALE WARNING IN EFFECT UNTIL 2 AM CDT MONDAY...

.TONIGHT...South gales to 35 kt becoming southwest to 30 kt.
Chance of showers overnight. Waves 6 to 9 ft occasionally to
12 ft.
.MONDAY...West winds 15 to 25 kt becoming north 10 to 20 kt late
in the morning, then diminishing to 10 to 15 kt early in the
afternoon becoming north 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 5 to 10 kt becoming northwest. Chance
of showers in the evening. Waves 1 to 3 ft.
.TUESDAY...Northwest winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 1 to 2 ft building to 1 to 3 ft.
.TUESDAY NIGHT...North winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 1 to 3 ft.
.WEDNESDAY...Northeast winds 10 to 15 kt. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...East winds 5 to 10 kt becoming south. Waves
1 ft or less building to 1 to 3 ft.
.THURSDAY...South winds 10 to 20 kt. Waves 3 to 5 ft.
.FRIDAY...Southwest winds 10 to 20 kt. Waves 3 to 5 ft.

$$

LMZ080-366-565-567-669-671-673-675-777-779-868-870-872-874-876-
878-060315-
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-
257 PM CDT Sun Oct 5 2025

STURGEON BAY WI TO POINT BETSIE MI SOUTH...

.TONIGHT...South winds to 30 kt becoming southwest. Waves 6 to
9 ft occasionally to 12 ft.
.MONDAY...Southwest winds 15 to 25 kt veering to northwest 10 to
20 kt. Chance of showers in the morning, then chance of showers
and slight chance of thunderstorms in the afternoon. 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. Chance of showers in the evening, then showers overnight.
Waves 2 to 4 ft.
.TUESDAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of showers in the morning. Waves 4 to 6 ft occasionally to
8 ft.
.TUESDAY NIGHT...North winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 3 to 5 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 3 to 5 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt becoming
southeast. Waves 1 to 3 ft building to 3 to 5 ft.
.THURSDAY...Southeast winds 10 to 15 kt becoming south 10 to
20 kt. Waves 4 to 6 ft occasionally to 8 ft.
.FRIDAY...Southwest winds 10 to 20 kt. Waves 3 to 5 ft.

$$

LMZ761-060315-
MAFOR 0522/
MICHIGAN NORTH...GALE WARNING IN EFFECT...13450 11540 11536 11726
11820 11810. Waves 5 to 9 feet subsiding to 4 to 7 feet tonight.
Waves 3 to 6 feet subsiding to 2 to 4 feet Monday.

MICHIGAN SOUTH 13440 11540 11530 12520 11620. A chance of showers
Monday afternoon. Waves 5 to 8 feet subsiding to 3 to 6 feet
tonight. Waves 3 to 6 feet subsiding to 2 to 4 feet Monday.

$$
Wood

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

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