539
FZUS63 KMKX 291400
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
900 AM CDT Sun Jun 29 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...

South to southeast winds will increase today, becoming south to
southwest tonight, as weak high pressure around 30.0 inches
moves east of the region. A weak cold front will approach the
region from the Upper Mississippi River Valley later today and
tonight, moving across the region Monday. Southwest winds will
become west behind the front later Monday into Monday night.
Showers and some thunderstorms may accompany the frontal passage.
West winds should generally linger into the middle of the week.

LMZ261-362-364-366-563-565-567-868-292115-
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-
900 AM CDT Sun Jun 29 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...South winds 10 to 20 kt. Slight chance of
showers and thunderstorms. Waves 2 to 4 ft.
.TONIGHT...Southwest winds 10 to 20 kt diminishing to 5 to 10 kt.
Chance of showers and thunderstorms in the evening, then chance
of showers and slight chance of thunderstorms overnight. Waves
2 to 4 ft subsiding to 1 to 3 ft.
.MONDAY...Southwest winds 5 to 10 kt increasing to 10 to 15 kt.
Showers likely with a chance of thunderstorms in the morning,
then chance of showers and thunderstorms in the afternoon. Waves
1 to 3 ft.
.MONDAY NIGHT...Southwest winds 10 to 15 kt becoming west. Waves
1 to 3 ft.
.TUESDAY...West winds 10 to 20 kt. Waves 1 to 3 ft.
.TUESDAY NIGHT...Southwest winds 10 to 20 kt becoming west 10 to
15 kt. Waves 1 to 2 ft.
.WEDNESDAY...West winds 10 to 15 kt becoming southwest 10 to
20 kt. Waves 1 to 2 ft.
.THURSDAY...North winds 10 to 15 kt becoming northeast. Waves
1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-292115-
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-
900 AM CDT Sun Jun 29 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...South winds 10 to 15 kt increasing to 10 to
20 kt. Slight chance of showers and thunderstorms this afternoon.
Waves 1 to 3 ft.
.TONIGHT...South winds 10 to 20 kt becoming southwest 5 to 10 kt.
Slight chance of showers and thunderstorms in the evening, then
chance of showers and slight chance of thunderstorms overnight.
Waves 1 to 3 ft subsiding to 1 to 2 ft.
.MONDAY...Southwest winds 5 to 10 kt becoming west 10 to 15 kt.
Chance of showers in the morning, then chance of showers and
thunderstorms in the afternoon. Waves 1 to 2 ft.
.MONDAY NIGHT...West winds 10 to 15 kt increasing to 10 to 20 kt.
Chance of thunderstorms in the evening. Waves 1 to 2 ft building
to 1 to 3 ft.
.TUESDAY...Northwest winds 10 to 20 kt becoming west. Waves 2 to
4 ft.
.TUESDAY NIGHT...Southwest winds 10 to 15 kt becoming west 5 to
10 kt. Waves 1 to 2 ft.
.WEDNESDAY...West winds 10 to 15 kt becoming southwest. Waves
1 to 2 ft.
.THURSDAY...Northwest winds 5 to 10 kt becoming north 10 to
15 kt. Waves 1 to 2 ft.

$$

LMZ761-292115-
MAFOR 2916/
MICHIGAN NORTH 13420 12520 11510 12506. A chance of thunderstorms
this evening and Monday morning. Waves 1 to 3 feet building to 2
to 4 feet this afternoon. Waves 2 to 4 feet subsiding to 1 to 3
feet tonight. Waves 2 feet or less Monday morning.

MICHIGAN SOUTH 11410 12420 12410 11510 12500. A chance of showers
overnight and Monday morning. Waves 1 to 3 feet this afternoon
and tonight. Waves 1 foot or less Monday morning.

$$


Kuroski

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

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