595
FZUS63 KMKX 261355
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
855 AM CDT Thu Jun 26 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...

Low pressure of 29.8 inches will approach from the Iowa and
Minnesota border today. A stationary front will stay parked over
the southern end of the lake into this evening with south winds
south of the boundary and north to northeast winds north of the
boundary. As the surface low approaches tonight, winds will come
around to southwesterly over the whole lake and some thunderstorms
will be possible over much of the open waters. The low is then
expected to pass early Friday morning, dragging a cold front over
the lake. Winds will turn to westerly and northwesterly through
Friday, becoming northerly Friday night.

LMZ261-362-364-366-563-565-567-868-262115-
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-
855 AM CDT Thu Jun 26 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Northeast winds 15 to 25 kt increasing to 30 kt.
Slight chance of showers. Waves 3 to 5 ft.
.TONIGHT...Northeast winds to 30 kt veering to southeast 15 to
25 kt. Chance of showers and thunderstorms in the evening, then
showers likely with a chance of thunderstorms overnight. Patchy
fog overnight. Waves 3 to 5 ft.
.FRIDAY...South winds 10 to 20 kt veering to northwest. Patchy
fog in the morning. Chance of showers in the morning. Waves 2 to
4 ft subsiding to 1 to 3 ft.
.FRIDAY NIGHT...North winds 10 to 20 kt diminishing to 5 to 10 kt
overnight. Waves 1 to 2 ft.
.SATURDAY...Northwest winds 5 to 10 kt backing to southwest 10 to
15 kt. Waves 1 ft or less.
.SATURDAY NIGHT...South winds 5 to 10 kt. Waves 1 ft or less.
.SUNDAY...South winds 10 to 20 kt. Waves 1 to 3 ft.
.MONDAY...Southwest winds 10 to 15 kt increasing to 10 to 20 kt.
Chance of showers. Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-262115-
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-
855 AM CDT Thu Jun 26 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...West winds 10 to 15 kt backing to east. Slight
chance of showers and thunderstorms. Waves 1 to 2 ft.
.TONIGHT...East winds 10 to 15 kt veering to southwest. Chance of
showers and thunderstorms. Waves 1 to 3 ft.
.FRIDAY...Southwest winds 10 to 20 kt becoming west 10 to 15 kt.
Chance of showers in the morning, then chance of thunderstorms in
the afternoon. Waves 1 to 3 ft.
.FRIDAY NIGHT...North winds 10 to 15 kt diminishing to 5 to
10 kt. Chance of showers in the evening. Waves 1 to 2 ft.
.SATURDAY...North winds 5 to 10 kt becoming northeast 10 to
15 kt. Waves 1 ft or less.
.SATURDAY NIGHT...Southeast winds 5 to 10 kt becoming south.
Waves 1 ft or less.
.SUNDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.MONDAY...Southwest winds 10 to 15 kt becoming west. Chance of
showers and thunderstorms. Waves 1 to 2 ft.

$$

LMZ761-262115-
MAFOR 2616/
MICHIGAN NORTH 12130 11140 11230 11246 11336 11420 11520. A
chance of thunderstorms tonight. Waves 2 to 4 feet this
afternoon. Waves 3 to 5 feet tonight. Waves 2 to 4 feet subsiding
to 1 to 3 feet Friday morning.

MICHIGAN SOUTH 11710 12210 11310 12410 12520. A chance of showers
and thunderstorms tonight. A chance of showers Friday morning.
Waves 2 feet or less this afternoon and tonight. Waves 1 to 3
feet Friday morning.

$$


Boxell

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

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