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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 12 September 2026

Tonight and Sunday.

Strong wind warning in effect.

Wind southwest 10 knots veering to west 10 early Sunday morning then increasing to northwest 15 Sunday afternoon. Wind increasing to northwest 20 Sunday evening.

Scattered showers Sunday evening.

Waves

Issued 06:30 PM EDT 12 September 2026
Tonight and Sunday. Waves 0.5 metres or less building to 0.5 to 1 Sunday evening.

Extended Forecast

Issued 06:30 PM EDT 12 September 2026
Monday Wind northwest 20 knots diminishing to light in the morning.
Tuesday Wind southwest 20 knots.
Wednesday Wind light.

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Map of Great Lakes - Lake Huron marine weather areas Erieau CFB Trenton Muskoka Airport Parry Sound Harbour Toronto City Centre Airport Lake Simcoe Regional Airport Wiarton Airport Point Petre Lagoon City Western Islands Cobourg Port Colborne Windsor Airport Point Pelee Welland-Pelham Vineland Station Burlington Lift Bridge Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Harrow AAFC Hamilton Munro Int'l Airport Tobermory Sarnia Chris Hadfield Airport Oshawa Executive Airport Collingwood Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Peterborough Municipal Airport Brockville Grenadier Island Kingston Airport
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Ice Conditions

*Ice Forecast and Warnings also apply to U.S. waters

Ice Forecasts

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Lake St. Clair

Issued 6:30 PM EDT 12 September 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 12 September 2026 Tonight and Sunday At 6:30 p.m. EDT tonight departing ridge located south of Nova
Scotia.

At 6:30 p.m. EDT tonight cold front from 992 mb low located on a
line northeast-southwest over northern Lower Michigan.
By 6:30 p.m. EDT Sunday cold front from 986 mb low located from
Montréal to Erie.

At 6:30 p.m. EDT tonight ridge located on a line northwest-southeast
over South Dakota.
By 6:30 p.m. EDT Sunday ridge located on a line northwest-southeast
over Minnesota.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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