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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EST 10 November 2025

Tonight and Tuesday.

Strong wind warning in effect.

Wind northwest 20 knots backing to west 20 near midnight then to southwest 20 near noon Tuesday. Wind increasing to southwest 25 Tuesday evening.

Scattered flurries this evening Tuesday afternoon and evening.

Waves

Issued 06:30 PM EST 10 November 2025
Tonight and Tuesday. Waves 1 metre building to 1 to 1.5 Tuesday evening.

Extended Forecast

Issued 06:30 PM EST 10 November 2025
Wednesday Wind southwest 25 knots.
Thursday Wind west 15 knots diminishing to light.
Friday 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

Warnings (In effect)

Strong wind warning in effect

Lake St. Clair

Issued 6:30 PM EST 10 November 2025

'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 or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EST 10 November 2025 Tonight and Tuesday At 6:30 p.m. EST tonight low 998 mb located over the Eastern
Seaboard.
By 6:30 p.m. EST Tuesday low 982 mb located over northeastern
Quebec.

At 6:30 p.m. EST tonight ridge located on a line north-south over
Lake Superior.
By 6:30 p.m. EST Tuesday ridge located on a line north-south over
southern Ontario.

At 6:30 p.m. EST tonight trough located on a line north-south over
western Manitoba.
By 6:30 p.m. EST Tuesday trough located on a line north-south over
northern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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