580
FZUS63 KMKX 270155
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
855 PM CDT Sat Jul 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...

Light to occasionally moderate south to southwest winds will
prevail into Monday. There will be additional round of showers and
thunderstorms to track across the region Sunday night into Monday
and again by the middle of the week. There may be more variable
winds accompanying any storm complex that traverses the lake
through early next week. A cold front looks to push across the
lake by Wednesday, bringing increased north to northeast winds.
High pressure around 30.3 inches should then move into the region
for the end of the week.

LMZ261-362-364-366-563-565-567-868-270915-
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 PM CDT Sat Jul 26 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Southwest winds 5 to 10 kt increasing to 10 to
15 kt. Patchy fog. Waves 1 to 2 ft.
.SUNDAY...West winds 5 to 10 kt becoming southwest 10 to 15 kt.
Patchy fog in the morning. Waves 1 to 2 ft.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt. Waves 1 to 2 ft.
.MONDAY...Southwest winds 10 to 20 kt. Chance of showers in the
morning. Waves 1 to 3 ft.
.MONDAY NIGHT...Northwest winds 10 to 20 kt becoming north 5 to
10 kt overnight. Waves 1 to 2 ft.
.TUESDAY...North winds 10 to 15 kt becoming northwest 10 to
20 kt. Waves 1 to 2 ft.
.TUESDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 1 to 2 ft.
.WEDNESDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.
.THURSDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-270915-
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 PM CDT Sat Jul 26 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Southwest winds 5 to 10 kt becoming west.
Slight chance of showers and thunderstorms through early evening.
Patchy fog overnight. Waves 1 to 2 ft.
.SUNDAY...West winds 5 to 10 kt backing to south 10 to 15 kt.
Patchy fog in the morning. Waves 1 to 2 ft.
.SUNDAY NIGHT...South winds 5 to 10 kt becoming southwest. Waves
1 to 2 ft.
.MONDAY...Southwest winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.
.MONDAY NIGHT...Southwest winds 10 to 15 kt veering to north 5 to
10 kt. Waves 1 to 2 ft.
.TUESDAY...Northeast winds 10 to 15 kt becoming north 10 to
20 kt. Waves 1 to 2 ft.
.TUESDAY NIGHT...North winds 10 to 15 kt becoming northeast.
Waves 1 to 2 ft.
.WEDNESDAY...Northeast winds 10 to 15 kt becoming north 10 to
20 kt. Chance of showers. Waves 1 to 3 ft.
.THURSDAY...Northeast winds 10 to 20 kt becoming north. Waves
3 to 5 ft.

$$

LMZ761-270915-
MAFOR 2704/
MICHIGAN NORTH 11500 12510 11500 14510. Waves 1 foot or less.

MICHIGAN SOUTH 12500 12600 11500 11510 11410 11400. Waves 1 foot
or less.

$$
Wood

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

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