Expires:202507180345;;612370
FZUS63 KMKX 171923
GLFLM 

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
223 PM CDT Thu Jul 17 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... 

Modest northerly winds will gradually weaken into the evening as 
high pressure around 30.1 inches moves from northern Minnesota to 
northern Lake Michigan by this evening. The high will then move to
the Mid Atlantic States by Friday night while low pressure around
29.8 inches moves into the Upper Mississippi River Valley. Thus 
light to modest northeast winds this evening will become light and
variable late tonight into Friday evening. Light to modest 
southerly winds will then develop Saturday morning ahead of the 
approaching weak low with winds turning northerly again after the 
lows passage by Saturday evening. Light to modest northeast winds 
will then prevail late Saturday night into Sunday while another 
high pressure area around 30.1 inches sets up over Lake Superior.


LMZ080-669-671-673-675-777-779-870-872-874-876-878-180345-
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-
223 PM CDT Thu Jul 17 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...North winds 10 to 20 kt becoming east 10 to 15 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. 
.FRIDAY...East winds 10 to 15 kt diminishing to 5 to 10 kt. Waves
1 to 3 ft subsiding to 1 to 2 ft. 
.FRIDAY NIGHT...Northeast winds 5 to 10 kt veering to south.
Chance of showers overnight. Waves 1 to 2 ft. 
.SATURDAY...South winds 10 to 15 kt becoming southwest. Chance of
showers in the morning, then chance of showers and thunderstorms
in the afternoon. Waves 1 to 2 ft. 
.SATURDAY NIGHT...North winds 10 to 15 kt becoming northeast.
Chance of showers and thunderstorms in the evening. Waves 1 to
3 ft. 
.SUNDAY...Northeast winds 10 to 15 kt. Waves 1 to 3 ft. 
.SUNDAY NIGHT...Northeast winds 10 to 15 kt becoming east. Waves
1 to 3 ft. 
.MONDAY...Southeast winds 10 to 20 kt. Chance of showers. Waves
2 to 4 ft. 
.TUESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Chance of showers. Waves 2 to 4 ft.  

$$