773
FZUS63 KMKX 170158
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
858 PM CDT Thu Jul 16 2026

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...

Wildfire smoke from northern MN and northwestern Ontario continues
across all open waters of Lake Michigan and will reduce visibility
to 1 nm or less at times. Thus a Marine Dense Smoke Advisory
continues today through Friday for all open waters.

Lighter winds continue this evening as high pressure around 30.1
inches gradually exits the region ahead of an incoming low
pressure around 29.7 inches tracking in from the Northern Plains.
This low pressure will shift winds across Lake Michigan to the
southwest on Friday and continue to push across Ontario later
Friday through Saturday dragging a cold front across the lake
through Saturday morning. Northerly winds will develop behind this
frontal passage through the day Saturday along with high pressure
around 30.0 inches. The high will then work its way across the
Upper Great through the day Sunday and departing to the east
overnight Sunday while another deepening low tracks across Ontario
for the start of next week. Expect more southerly wind for Monday
before another, stronger cold front pushes through the region by
Tuesday.

Additionally will see periodic shower and thunderstorm chances
across the lake heading into the weekend through the start of next
week.

LMZ261-362-364-366-563-565-567-868-170915-
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-
858 PM CDT Thu Jul 16 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

...DENSE SMOKE ADVISORY IN EFFECT UNTIL 7 PM CDT FRIDAY...

.REST OF TONIGHT...North winds 5 to 10 kt veering to east. Smoke.
Waves 1 ft or less.
.FRIDAY...Southeast winds 5 to 10 kt increasing to 10 to 20 kt.
Smoke. Slight chance of showers. Waves 1 to 2 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt becoming west 15 to
25 kt. Smoke in the evening, then patchy smoke overnight. Chance
of showers and thunderstorms in the evening, then scattered
showers and thunderstorms overnight. Waves 3 to 5 ft.
.SATURDAY...Northwest winds to 30 kt becoming north. Patchy smoke
in the morning. Waves 4 to 6 ft occasionally to 8 ft.
.SATURDAY NIGHT...North winds to 30 kt diminishing to 10 to 20 kt
overnight. Waves 4 to 6 ft occasionally to 8 ft.
.SUNDAY...Northeast winds 10 to 15 kt backing to southwest 10 to
20 kt. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.SUNDAY NIGHT...South winds 10 to 20 kt becoming southwest to
30 kt. Waves 1 to 2 ft building to 2 to 4 ft.
.MONDAY...Southwest winds to 30 kt increasing to gales to 35 kt.
Chance of showers and thunderstorms. Waves 4 to 6 ft occasionally
to 8 ft building to 4 to 7 ft occasionally to 9 ft.
.TUESDAY...Northwest winds to 30 kt increasing to gales to 35 kt.
Waves 4 to 6 ft occasionally to 8 ft building to 4 to 7 ft
occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-170915-
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-
858 PM CDT Thu Jul 16 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...DENSE SMOKE ADVISORY IN EFFECT UNTIL 7 PM CDT FRIDAY...

.REST OF TONIGHT...Northeast winds 10 to 15 kt becoming east.
Smoke. Waves 1 to 2 ft.
.FRIDAY...Southeast winds 5 to 10 kt becoming south. Smoke. Waves
1 to 2 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt becoming southwest. Waves
3 to 5 ft.
.SATURDAY...West winds 15 to 25 kt veering to north to 30 kt.
Scattered showers. Waves 3 to 5 ft building to 4 to 6 ft
occasionally to 8 ft.
.SATURDAY NIGHT...North winds to 30 kt becoming northeast 15 to
25 kt. Waves 4 to 7 ft occasionally to 9 ft.
.SUNDAY...Northeast winds 10 to 15 kt becoming north 10 to 20 kt.
Waves 3 to 5 ft subsiding to 1 to 3 ft.
.SUNDAY NIGHT...East winds 10 to 20 kt veering to south. Waves
1 to 3 ft.
.MONDAY...Southwest winds 15 to 25 kt becoming south to 30 kt.
Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.
.TUESDAY...Northwest winds to 30 kt becoming north gales to
35 kt. Waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft
occasionally to 10 ft.

$$

LMZ761-170915-
MAFOR 1704/
MICHIGAN NORTH 12200 12300 12310 11420 11430. A chance of showers
and thunderstorms Friday evening. Waves 2 feet or less overnight
and Friday. Waves 1 to 3 feet Friday evening.

MICHIGAN SOUTH 11100 11200 11300 11400 13410 11420. Waves 2 feet
or less.

$$


DDV

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

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