149
FZUS63 KMKX 141313
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
813 AM CDT Fri Aug 14 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...

Multiple rounds of storms are expected to cross the southern
portion of Lake Michigan into this weekend due to a front that
remains in place south of the lake. Low pressure around 29.7
inches over Kansas will track to the northeast and east toward
southern Lake Michigan into Saturday. This low should help to
increase winds and waves across the southern two thirds of Lake
Michigan into Saturday. Beyond this system, a broad ridge of high
pressure around 30.1 inches will push into the Great Lakes early
next week before another potential system moves through the
region middle of next week.

LMZ261-362-364-563-142115-
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 Rock Island Passage to Sturgeon Bay WI-
813 AM CDT Fri Aug 14 2026

STURGEON BAY WI TO POINT BETSIE MI NORTH...

.REST OF TODAY...Northeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 1 to 3 ft.
.TONIGHT...Northeast winds 10 to 20 kt becoming east 10 to 15 kt.
Waves 1 to 3 ft.
.SATURDAY...East winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.SATURDAY NIGHT...Southeast winds 10 to 20 kt veering to
southwest. Chance of showers. Waves 1 to 3 ft.
.SUNDAY...Northwest winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of showers in the morning. Waves 1 to 2 ft building to
1 to 3 ft.
.SUNDAY NIGHT...North winds 15 to 25 kt diminishing to 10 to
15 kt. Waves 2 to 4 ft.
.MONDAY...Northwest winds 10 to 15 kt becoming west 10 to 20 kt.
Waves 1 to 2 ft.
.TUESDAY...Southwest winds to 30 kt increasing to gales to 35 kt.
Waves 2 to 4 ft.

$$

LMZ366-565-567-669-868-870-142115-
Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to
Mid Lake-
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 Sheboygan to Port Washington WI 5 NM offshore
to Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid
Lake-
Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid
Lake-
813 AM CDT Fri Aug 14 2026

STURGEON BAY WI TO POINT BETSIE MI SOUTH TO PORT WASHINGTON WI TO
WHITEHALL MI...

.REST OF TODAY...Northeast winds 10 to 20 kt becoming north 15 to
25 kt. Waves 2 to 4 ft.
.TONIGHT...Northeast winds 15 to 25 kt veering to east 10 to
20 kt. Slight chance of showers overnight. Waves 3 to 5 ft.
.SATURDAY...Southeast winds 10 to 20 kt. Chance of showers. Waves
4 to 6 ft occasionally to 8 ft.
.SATURDAY NIGHT...South winds 10 to 20 kt becoming southwest.
Chance of showers. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.SUNDAY...Northwest winds 10 to 20 kt becoming north. Waves 1 to
3 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt. Waves 2 to 4 ft.
.MONDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.TUESDAY...Southwest winds 10 to 20 kt increasing to 30 kt. Waves
2 to 4 ft.

$$

LMZ080-671-673-675-777-779-872-874-876-878-142115-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
813 AM CDT Fri Aug 14 2026

PORT WASHINGTON WI TO WHITEHALL MI SOUTH...

.REST OF TODAY...East winds 10 to 15 kt becoming north 10 to
20 kt. Waves 2 to 4 ft.
.TONIGHT...North winds 10 to 20 kt veering to southeast. Chance
of showers and slight chance of thunderstorms overnight. Waves
3 to 5 ft.
.SATURDAY...Southeast winds 10 to 20 kt. Showers likely with a
chance of thunderstorms in the morning, then chance of showers
and thunderstorms in the afternoon. Waves 4 to 6 ft occasionally
to 8 ft.
.SATURDAY NIGHT...South winds 10 to 20 kt becoming southwest.
Chance of showers in the evening, then showers likely overnight.
Waves 2 to 4 ft subsiding to 1 to 3 ft.
.SUNDAY...West winds 10 to 20 kt becoming northwest. Chance of
showers in the morning. Waves 1 to 3 ft.
.SUNDAY NIGHT...North winds 10 to 15 kt increasing to 10 to
20 kt. Waves 2 to 4 ft.
.MONDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 2 to 4 ft.
.TUESDAY...Southwest winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.

$$

LMZ761-142115-
MAFOR 1416/
MICHIGAN NORTH 12120 11130 12120 12220 11320. Waves 1 to 3 feet
building to 2 to 4 feet this afternoon. Waves 2 to 4 feet
tonight. Waves 2 to 4 feet building to 3 to 5 feet Saturday
morning.

MICHIGAN SOUTH 11120 11820 11830 11120 12220 11320 11336. A
chance of thunderstorms Saturday morning. Waves 1 to 3 feet
building to 2 to 4 feet this afternoon. Waves 2 to 4 feet
tonight. Waves 3 to 5 feet Saturday morning.

$$


Quigley

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

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