550
FZUS63 KMKX 242004
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
304 PM CDT Fri Jul 24 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...

Gusty southerly winds are expected across all of Lake Michigan
through Saturday as a low pressure averaging 29.5 inches
approaches from the northern Plains. Gusts up to 30 knots are
expected over the north half. A frontal boundary will stall over
the Upper Great Lakes, mainly over Wisconsin and Lake Michigan,
through most of Monday. This will result in increasing
thunderstorm chances with severe storms possible. Very warm, moist
and unstable air flowing over the relatively cool waters may
cause patchy marine fog early next week.

Northerly winds are expected Monday night through Wednesday as
high pressure of 29.9 inches builds over the Upper Great Lakes.
Look for southerly winds and more unsettled weather to resume
Thursday into the next weekend.

LMZ261-362-364-366-563-565-567-868-250315-
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-
304 PM CDT Fri Jul 24 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...South winds to 30 kt becoming southwest 15 to 25 kt.
Waves 3 to 5 ft.
.SATURDAY...Southwest winds 15 to 25 kt becoming south to 30 kt.
Slight chance of showers and thunderstorms in the morning. Waves
3 to 5 ft.
.SATURDAY NIGHT...South winds 15 to 25 kt becoming southwest
10 to 20 kt late in the evening, then diminishing to 10 to 15 kt
after midnight becoming southwest 10 to 15 kt late. Waves 3 to
5 ft subsiding to 2 to 4 ft.
.SUNDAY...Southwest winds 10 to 15 kt becoming south 10 to 20 kt.
Waves 1 to 3 ft.
.SUNDAY NIGHT...South winds 10 to 20 kt becoming southwest 10 to
15 kt. Thunderstorms likely with a chance of showers in the
evening, then chance of showers and thunderstorms overnight.
Waves 1 to 3 ft.
.MONDAY...West winds 10 to 20 kt veering to north 15 to 25 kt.
Chance of showers and thunderstorms. Waves 1 to 3 ft.
.MONDAY NIGHT...North winds 10 to 20 kt. Chance of showers. Waves
1 to 3 ft.
.TUESDAY...North winds 15 to 25 kt increasing to 30 kt. Waves
2 to 4 ft.
.WEDNESDAY...North winds 10 to 15 kt becoming northeast 10 to
20 kt. Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-250315-
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-
304 PM CDT Fri Jul 24 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...South winds 15 to 25 kt diminishing to 10 to 20 kt
late this evening, then becoming southwest after midnight. Waves
2 to 4 ft.
.SATURDAY...Southwest winds 10 to 20 kt becoming south 15 to
25 kt. Waves 3 to 5 ft.
.SATURDAY NIGHT...South winds 15 to 25 kt becoming southwest
10 to 20 kt late in the evening, then diminishing to 10 to 15 kt
after midnight. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SUNDAY...Southwest winds 10 to 15 kt becoming south 10 to 20 kt.
Waves 1 to 3 ft.
.SUNDAY NIGHT...Southwest winds 10 to 20 kt diminishing to 10 to
15 kt. Chance of showers and thunderstorms. Waves 1 to 3 ft.
.MONDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of showers and thunderstorms. Waves 2 to 4 ft.
.MONDAY NIGHT...Northwest winds 10 to 20 kt becoming north 15 to
25 kt. Waves 3 to 5 ft.
.TUESDAY...North winds 15 to 25 kt increasing to 30 kt. Waves
4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...North winds 10 to 15 kt increasing to 15 to 25 kt.
Waves 1 to 3 ft.

$$

LMZ761-250315-
MAFOR 2422/
MICHIGAN NORTH 11430 11440 14530 12440. Waves 1 to 3 feet
building to 2 to 4 feet tonight. Waves 2 to 4 feet building to 3
to 5 feet Saturday.

MICHIGAN SOUTH 11430 12420 12510 11520 12430. Waves 1 to 3 feet
tonight. Waves 1 to 3 feet building to 2 to 4 feet Saturday.

$$


Cronce

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

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