118
FZUS63 KMKX 130741
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
241 AM CDT Fri Jun 13 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 30.3 inches centered over Ontario will keep
winds primarily northeasterly through the weekend, while low
pressure of 29.7 inches over the Central Plains keeps a
stationary front across far southern Lake Michigan. Winds remain
light and variable south of the front.

Weak low pressure of 29.9 inches will then develop in the Ohio
Valley on later today, moving eastward and weakening into Sunday.
A line of thunderstorms may develop Sunday afternoon and progress
eastward into Sunday night and Monday morning. Chances for
thunderstorms then continue into midweek as the Ontario high
pressure weakens.

LMZ261-362-364-366-563-565-567-868-131515-
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-
241 AM CDT Fri Jun 13 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northeast winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of showers. Waves 3 to 5 ft.
.TONIGHT...Northeast winds 15 to 25 kt becoming east 10 to 20 kt.
Chance of showers in the evening, then slight chance of showers
overnight. Waves 2 to 4 ft.
.SATURDAY...East winds 10 to 20 kt becoming northeast. Waves 1 to
3 ft.
.SATURDAY NIGHT...Northeast winds 10 to 20 kt becoming east 10 to
15 kt. Waves 1 to 2 ft.
.SUNDAY...East winds 5 to 10 kt becoming northeast 10 to 15 kt.
Waves 1 ft or less.
.SUNDAY NIGHT...East winds 10 to 15 kt veering to south 5 to
10 kt. Chance of showers. Waves 1 ft or less.
.MONDAY...Southwest winds 10 to 15 kt becoming south. Waves 1 to
2 ft.
.TUESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Chance of showers. Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-131515-
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-
241 AM CDT Fri Jun 13 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...East winds 10 to 20 kt becoming northeast. Slight chance
of showers this morning. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.TONIGHT...Northeast winds 10 to 20 kt becoming east. Slight
chance of showers in the evening. Waves 2 to 4 ft.
.SATURDAY...East winds 10 to 20 kt becoming northeast 10 to 15 kt
late in the morning, then diminishing to 5 to 10 kt early in the
afternoon becoming north 10 to 15 kt late. Waves 1 to 3 ft.
.SATURDAY NIGHT...Northeast winds 10 to 15 kt becoming east 5 to
10 kt. Waves 1 to 2 ft.
.SUNDAY...East winds 5 to 10 kt becoming north 10 to 15 kt. Waves
1 to 2 ft.
.SUNDAY NIGHT...Northeast winds 5 to 10 kt veering to southeast.
Waves 1 ft or less.
.MONDAY...South winds 10 to 15 kt. Chance of showers. Waves 1 to
2 ft.
.TUESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Chance of showers. Waves 1 to 3 ft.

$$

LMZ761-131515-
MAFOR 1310/
MICHIGAN NORTH 14120 11136 11130 12220. Waves 2 to 4 feet
subsiding to 1 to 3 feet.

MICHIGAN SOUTH 13220 11110 12120 12220. Waves 3 to 5 feet
subsiding to 1 to 3 feet today. Waves 1 to 3 feet tonight.

$$


Kuroski

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

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