Marine Forecast Map
Click on any of the red dots to view the marine forecast for that area.
Major US Cities
Marine Forecast Report


FZUS63 KLOT 220740
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
240 AM CDT Tue Aug 22 2017

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...Low pressure of 29.7 inches over the upper Great Lakes
will move northeast into southwestern Ontario Tuesday morning,
deepening to 29.4 inches and continuing into Quebec by afternoon
while dragging a cold front south down the lake. The low will
deepen further to 29.2 inches Tuesday night while high pressure of
30.1 inches spreads southeast across the Plains. The high will
eventually drift east to the western Lakes by early Thursday, then
will remain in place and strengthen to 30.2 inches while drifting
very slowly east into Saturday.

LMZ261-362-364-366-563-565-567-868-221515-
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-
240 AM CDT Tue Aug 22 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...West winds 15 to 25 kt becoming northwest. Slight chance
of showers this morning. Waves 4 to 6 ft occasionally to 8 ft.
.TONIGHT...Northwest winds 15 to 25 kt. Waves 3 to 5 ft building
to 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt becoming north. Waves
4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.WEDNESDAY NIGHT...North winds 10 to 20 kt. Waves 2 to 4 ft.
.THURSDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 1 to 3 ft.
.FRIDAY...North winds 5 to 10 kt. Waves 1 to 2 ft.
.SATURDAY...East winds less than 10 kt becoming northeast. Waves
nearly calm.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-221515-
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-
240 AM CDT Tue Aug 22 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...West winds 15 to 25 kt becoming northwest. Chance of
showers and slight chance of thunderstorms this morning. Waves 3
to 5 feet building to 5 to 8 feet occasionally to 10 feet.
.TONIGHT...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Waves 5 to 8 ft occasionally to 10 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt becoming north. Waves
4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.WEDNESDAY NIGHT...North winds 10 to 20 kt. Waves 3 to 5 ft.
.THURSDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...Northeast winds 10 to 20 kt diminishing to
10 to 15 kt. Waves 2 to 4 ft.
.FRIDAY...Northeast winds 5 to 10 kt. Waves 1 to 2 ft.
.SATURDAY...Northeast winds less than 10 kt increasing to 5 to
10 kt. Waves 1 ft or less.

$$

LMZ761-221515-
MAFOR 2209/
MICHIGAN NORTH 12630 14730 11740 11730. Chance of showers early
this morning. Waves 4 to 6 feet occasionally to 8 feet today.
Waves 4 to 7 feet occasionally to 9 feet tonight.

MICHIGAN SOUTH 12630 13730 12740 11730. Chance of showers early
this morning. Waves 3 to 5 feet building to 5 to 8 feet
occasionally to 10 feet today. Waves 5 to 8 feet occasionally to
10 feet tonight.

$$

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

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

More in Boat & Beach
Featured Tool:

View complete marine weather reports for various on and off-shore locations.
Boat & Beach Weather Maps
Advertisements