591
FZUS63 KMKX 140222
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
922 PM CDT Sun Sep 13 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...

North winds will gradually ease overnight into Monday morning, as
high pressure around 30.3 inches moves across the lake.

Winds will then increase and veer to south southeast Monday
afternoon and night, becoming south into Tuesday, as low pressure
around 29.3 inches moves from southern Manitoba through northern
Ontario. Gales are expected Monday night into Tuesday morning. A
Gale Warning has been issued for Lake Michigan.

Periods of showers and thunderstorms will accompany the
developing low from as early as Monday evening into Tuesday. Winds
will trend north to northeast Tuesday night into Wednesday, as
high pressure around 30.3 inches moves into the region. North to
northeast winds may linger into the rest of the week, as the high
slowly moves to the east of the region.

LMZ261-362-364-563-140930-
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-
922 PM CDT Sun Sep 13 2026

STURGEON BAY WI TO POINT BETSIE MI NORTH...

...GALE WARNING IN EFFECT FROM MONDAY EVENING THROUGH EARLY
TUESDAY AFTERNOON...

.REST OF TONIGHT...Northwest winds 15 to 25 kt becoming north
10 to 15 kt. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.MONDAY...Northwest winds 5 to 10 kt backing to southwest late in
the morning, then becoming south early in the afternoon becoming
10 to 20 kt late. Waves 1 to 2 ft building to 1 to 3 ft.
.MONDAY NIGHT...South winds to 30 kt increasing to gales to
40 kt. Chance of showers in the evening, then showers overnight.
Waves 4 to 6 ft occasionally to 8 ft building to 10 to 14 ft
occasionally to 18 ft.
.TUESDAY...Southwest gales to 40 kt diminishing to 30 kt. Chance
of showers in the morning. Waves 10 to 14 ft occasionally to 18 ft
subsiding to 7 to 10 ft occasionally to 13 ft.
.TUESDAY NIGHT...Northwest winds to 30 kt becoming north 10 to
20 kt overnight. Waves 4 to 6 ft occasionally to 8 ft subsiding
to 2 to 4 ft.
.WEDNESDAY...Northeast winds 5 to 10 kt increasing to 10 to
15 kt. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt becoming east 5 to
10 kt. Waves 1 ft or less.
.THURSDAY...Northeast winds 10 to 15 kt becoming north. Waves
1 to 2 ft.
.FRIDAY...East winds 10 to 15 kt becoming southeast. Chance of
showers. Waves 1 to 2 ft.

$$

LMZ366-565-567-669-671-673-675-868-870-872-874-876-140930-
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 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-
922 PM CDT Sun Sep 13 2026

STURGEON BAY WI TO POINT BETSIE MI SOUTH TO WINTHROP HARBOR IL TO
SOUTH HAVEN MI...

...GALE WARNING IN EFFECT FROM MONDAY EVENING THROUGH EARLY
TUESDAY MORNING...

.REST OF TONIGHT...Northwest winds 10 to 20 kt becoming north
10 to 15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.MONDAY...East winds 10 to 15 kt becoming southeast late in the
morning, then becoming south 10 to 20 kt early in the afternoon
increasing to 15 to 25 kt late. Waves 2 to 4 ft building to 3 to
5 ft.
.MONDAY NIGHT...South winds to 30 kt increasing to gales to
40 kt. Chance of showers overnight. Waves 4 to 7 ft occasionally
to 9 ft building to 10 to 14 ft occasionally to 18 ft.
.TUESDAY...Southwest gales to 35 kt diminishing to 30 kt. Showers
likely in the morning, then chance of showers in the afternoon.
Waves 10 to 14 ft occasionally to 18 ft subsiding to 7 to 10 ft
occasionally to 13 ft.
.TUESDAY NIGHT...Northwest winds 10 to 20 kt becoming north.
Chance of showers in the evening. Waves 4 to 6 ft occasionally to
8 ft subsiding to 2 to 4 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Chance of showers. Waves 3 to 5 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 kt becoming east
10 to 15 kt. Showers likely with a chance of thunderstorms. Waves
1 to 3 ft.
.THURSDAY...Northeast winds 10 to 15 kt increasing to 10 to
20 kt. Chance of showers. Waves 2 to 4 ft.
.FRIDAY...East winds 10 to 20 kt becoming southeast. Chance of
showers. Waves 2 to 4 ft.

$$

LMZ080-777-779-878-140930-
Lake Michigan from Michigan City IN to St. Joseph MI 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 St. Joseph to South Haven MI 5 NM offshore to
Mid Lake-
922 PM CDT Sun Sep 13 2026

WINTHROP HARBOR IL TO SOUTH HAVEN MI SOUTH...

...GALE WARNING IN EFFECT FROM MONDAY EVENING THROUGH EARLY
TUESDAY MORNING...

.REST OF TONIGHT...North winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 3 to 5 ft.
.MONDAY...East winds 5 to 10 kt becoming southeast 10 to 15 kt
late in the morning, then increasing to 10 to 20 kt early in the
afternoon becoming southeast 10 to 20 kt late. Waves 2 to 4 ft.
.MONDAY NIGHT...Southeast winds to 30 kt becoming south gales to
35 kt. Chance of showers and thunderstorms overnight. Waves 4 to
6 ft occasionally to 8 ft building to 7 to 10 ft occasionally to
13 ft.
.TUESDAY...Southwest winds to 30 kt diminishing to 15 to 25 kt.
Chance of showers in the morning, then showers likely in the
afternoon. Waves 6 to 9 ft occasionally to 12 ft subsiding to
4 to 6 ft occasionally to 8 ft.
.TUESDAY NIGHT...Northwest winds 10 to 15 kt becoming north.
Showers likely in the evening, then chance of showers overnight.
Waves 1 to 3 ft.
.WEDNESDAY...Northeast winds 10 to 15 kt. Chance of showers.
Waves 2 to 4 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt. Chance of
showers. Waves 1 to 3 ft.
.THURSDAY...Northeast winds 10 to 15 kt becoming north. Waves
1 to 3 ft.
.FRIDAY...East winds 10 to 20 kt diminishing to 10 to 15 kt.
Chance of showers. Waves 2 to 4 ft.

$$

LMZ761-140930-
MAFOR 1404/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11820 11810 11800 11100
11410 11430 11440 11450. Waves 2 to 4 feet subsiding to 1 to 3
feet overnight. Waves 2 feet or less building to 3 to 5 feet
Monday. Waves 4 to 7 feet building to 6 to 9 feet Monday evening.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...12810 11110 12310 11430
11340 11450. Waves 2 to 4 feet subsiding to 1 to 3 feet
overnight. Waves 1 to 3 feet building to 3 to 5 feet Monday.
Waves 4 to 7 feet building to 6 to 9 feet Monday 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