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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 12 July 2025

Tonight and Sunday.

Wind southwest 15 knots diminishing to west 10 near midnight. Wind west 10 Sunday.

Scattered showers ending Sunday morning with a risk of thunderstorms.

Waves

Issued 06:30 PM EDT 12 July 2025
Tonight and Sunday. Waves 0.5 to 1 metre subsiding to 0.5 or less late overnight.

Extended Forecast

Issued 06:30 PM EDT 12 July 2025
Monday Wind light.
Tuesday Wind light.
Wednesday Wind light.

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

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

Ice Forecasts

Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 12 July 2025 Tonight and Sunday At 6:30 p.m. EDT tonight trough located on a line
northeast-southwest over Georgian Bay.
By 6:30 p.m. EDT Sunday trough located on a line northeast-southwest
over the St. Lawrence River.

At 6:30 p.m. EDT tonight low 1002 mb located over northern Ontario.
By 6:30 p.m. EDT Sunday low 988 mb located over southern Hudson Bay.

At 6:30 p.m. EDT tonight ridge located on a line north-south over
eastern Nebraska.
By 6:30 p.m. EDT Sunday ridge located on a line north-south over
Indiana.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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