475
FZUS63 KMKX 250905
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
305 AM CST Tue Nov 25 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...

Relatively light south to southeast winds will persist through
today as low pressure of 29.7 inches approaches from the
Minnesota/Iowa border. A cold front is expected to pass over the
lake tonight, turning winds southwest and breezy, with winds
steadily increasing toward daybreak on Wednesday.

A period of very strong west to northwest winds are then expected
through Wednesday as strong mixing may bring storm force wind
gusts to the southern two-thirds of the lake, with gales
anticipated over the northern third. A Storm Watch is in effect
through Wednesday into early Thursday morning. Winds will ease
slightly Thursday, but gales are then expected to continue into
early Friday as the low pressure moves into eastern Canada and
deepens to 29.2 inches.

LMZ261-362-364-563-251645-
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-
305 AM CST Tue Nov 25 2025

STURGEON BAY WI TO POINT BETSIE MI NORTH...

...GALE WARNING IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH LATE
THURSDAY NIGHT...

.TODAY...South winds 5 to 10 kt becoming east. Patchy fog. Chance
of drizzle this morning, then drizzle likely this afternoon.
Waves 1 to 3 ft subsiding to 1 to 2 ft.
.TONIGHT...Southeast winds 10 to 15 kt becoming south 15 to
25 kt. Rain likely in the evening, then rain overnight. Waves
1 to 2 ft building to 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...Southwest winds to 30 kt becoming west late in the
morning, then increasing to gales to 40 kt early in the afternoon
becoming northwest late. Rain in the morning, then rain and snow
in the afternoon. Waves 7 to 10 ft occasionally to 13 ft building
to 10 to 14 ft occasionally to 18 ft.
.WEDNESDAY NIGHT...Northwest gale force winds to 45 kt. Snow.
Waves 14 to 18 ft occasionally to 23 ft.
.THURSDAY...Northwest gale force winds to 45 kt diminishing to
gales to 40 kt. Snow. Waves 10 to 14 ft occasionally to 18 ft
subsiding to 7 to 10 ft occasionally to 13 ft.
.THURSDAY NIGHT...Northwest gales to 45 kt diminishing to gales
to 40 kt. Snow. Waves 7 to 10 ft occasionally to 13 ft subsiding
to 6 to 9 ft occasionally to 12 ft.
.FRIDAY...Northwest winds to 30 kt. Chance of snow. Waves 4 to
7 ft occasionally to 9 ft subsiding to 3 to 5 ft.
.SATURDAY...West winds 10 to 15 kt becoming southwest 10 to
20 kt. Chance of snow. Waves 1 to 2 ft.

$$

LMZ366-565-567-868-251645-
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 Pentwater to Manistee MI 5 NM offshore to Mid
Lake-
305 AM CST Tue Nov 25 2025

STURGEON BAY WI TO POINT BETSIE MI SOUTH TO SHEBOYGAN WI TO
PENTWATER MI...

...STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH LATE
WEDNESDAY NIGHT...
...GALE WARNING IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH
THURSDAY EVENING...

.TODAY...South winds 5 to 10 kt becoming southeast. Patchy fog.
Chance of drizzle. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.TONIGHT...South winds 5 to 10 kt increasing to 10 to 20 kt late
in the evening, then increasing to 15 to 25 kt after midnight
becoming southwest to 30 kt late. Chance of rain in the evening,
then rain overnight. Waves 1 to 2 ft building to 5 to 8 ft
occasionally to 10 ft.
.WEDNESDAY...Southwest gales to 35 kt becoming west gales to
40 kt late in the morning, then increasing to gales to 45 kt
early in the afternoon becoming northwest storm force winds to
50 kt late. Rain in the morning, then rain and snow in the
afternoon. Waves 12 to 16 ft occasionally to 21 ft building to
15 to 20 ft occasionally to 26 ft.
.WEDNESDAY NIGHT...Northwest storm force winds to 50 kt
diminishing to gales to 45 kt. Snow likely in the evening, then
chance of snow overnight. Waves 15 to 20 ft occasionally to
26 ft.
.THURSDAY...Northwest gales to 45 kt diminishing to gales to
35 kt in the afternoon. Chance of snow. Waves 12 to 16 ft
occasionally to 21 ft.
.THURSDAY NIGHT...Northwest gales to 35 kt diminishing to 30 kt.
Chance of snow. Waves 8 to 12 ft occasionally to 16 ft subsiding
to 7 to 10 ft occasionally to 13 ft.
.FRIDAY...Northwest winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.SATURDAY...Southwest winds 10 to 20 kt becoming south. Snow
likely. Waves 1 to 2 ft building to 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-251645-
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-
305 AM CST Tue Nov 25 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH LATE
WEDNESDAY NIGHT...
...GALE WARNING IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH
THURSDAY EVENING...

.TODAY...Southeast winds 5 to 10 kt becoming south. Patchy fog.
Rain likely with a chance of drizzle this morning, then slight
chance of drizzle this afternoon. Waves 1 to 3 ft subsiding to
1 to 2 ft.
.TONIGHT...South winds 10 to 15 kt becoming southwest 15 to 25 kt
late in the evening, then increasing to 30 kt after midnight
increasing to gales to 35 kt late. Chance of rain in the evening,
then slight chance of rain overnight. Waves 1 to 2 ft building to
8 to 11 ft occasionally to 14 ft.
.WEDNESDAY...West gales to 40 kt increasing to storm force winds
to 55 kt. Rain and snow likely in the morning, then snow in the
afternoon. Waves 12 to 16 ft occasionally to 21 ft building to
20 to 25 ft occasionally to 33 ft.
.WEDNESDAY NIGHT...West storm force winds to 50 kt becoming
northwest storm force winds to 50 kt. Chance of snow. Waves 20 to
25 ft occasionally to 33 ft.
.THURSDAY...Northwest gales to 45 kt diminishing to gales to
40 kt. Chance of snow. Waves 14 to 18 ft occasionally to 23 ft
subsiding to 12 to 16 ft occasionally to 21 ft.
.THURSDAY NIGHT...Northwest gales to 35 kt diminishing to 30 kt.
Chance of snow. Waves 10 to 14 ft occasionally to 18 ft.
.FRIDAY...Northwest winds to 30 kt diminishing to 10 to 20 kt.
Waves 7 to 10 ft occasionally to 13 ft subsiding to 5 to 8 ft
occasionally to 10 ft.
.SATURDAY...South winds 10 to 20 kt. Snow likely. Waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft.

$$

LMZ761-251645-
MAFOR 2511/
MICHIGAN NORTH 11410 11400 12300 11315 11410 11426 11436. Waves 1
to 3 feet today. Waves 2 feet or less building to 4 to 7 feet
tonight.

MICHIGAN SOUTH 11306 11300 13400 11420 11546 11540. A chance of
drizzle this morning today. Waves 2 feet or less today. Waves 1
foot or less building to 6 to 9 feet tonight.

$$


CMiller

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

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