466
FZUS63 KMKX 011352
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
852 AM CDT Fri Aug 1 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...

High pressure of 30.4 inches will continue to build in from the
northwest today. The high will then remain parked over the
Great Lakes region through the weekend, while gradually weakening
to 30.1 inches. Breezy east to north winds this morning will
become mainly northerly across the lake by this afternoon, except
for some southerly winds in the far north. Winds will then be
light and variable at times tonight through the weekend under the
high. Look for winds to become southerly Monday and Tuesday as low
pressure around 29.9 inches approaches from the Northern Plains.

LMZ261-362-364-366-563-565-567-868-012115-
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-
852 AM CDT Fri Aug 1 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...North winds 5 to 10 kt becoming northwest 10 to
15 kt. Patchy smoke. Waves 1 to 3 ft.
.TONIGHT...West winds 10 to 20 kt diminishing to 10 to 15 kt.
Patchy smoke in the evening. Waves 1 to 2 ft.
.SATURDAY...West winds 10 to 15 kt becoming southwest 10 to
20 kt. Waves 1 to 2 ft.
.SATURDAY NIGHT...Southwest winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 2 ft.
.SUNDAY...West winds 10 to 15 kt becoming southwest 10 to 20 kt.
Waves 1 to 2 ft.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt becoming south less
than 10 kt. Waves 1 to 2 ft.
.MONDAY...South winds 5 to 10 kt becoming southeast. Waves 1 ft
or less.
.TUESDAY...Southeast winds 5 to 10 kt becoming east 10 to 15 kt.
Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-012115-
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-
852 AM CDT Fri Aug 1 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Northeast winds 10 to 20 kt becoming north.
Areas of smoke. Waves 2 to 4 ft.
.TONIGHT...North winds 10 to 20 kt becoming northeast 10 to 15 kt
after midnight, then becoming east late. Patchy smoke in the
evening. Waves 2 to 4 ft.
.SATURDAY...East winds 5 to 10 kt backing to north. Waves 1 to
2 ft.
.SATURDAY NIGHT...North winds 10 to 15 kt veering to southeast.
Waves 1 ft or less.
.SUNDAY...East winds 5 to 10 kt becoming northeast. Waves nearly
calm.
.SUNDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Waves
1 ft or less.
.MONDAY...East winds 5 to 10 kt becoming northeast. Waves 1 ft or
less.
.TUESDAY...Southeast winds 10 to 15 kt becoming east. Waves 1 to
2 ft.

$$

LMZ761-012115-
MAFOR 0116/
MICHIGAN NORTH 12710 15610. Waves 2 feet or less.

MICHIGAN SOUTH 11120 13820 11110 13200. Waves 1 to 3 feet this
afternoon and tonight. Waves 2 feet or less Saturday morning.

$$


Cronce

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

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