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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 07 December 2025

Today Tonight and Monday.

Wind light becoming west 10 knots early this morning then increasing to northwest 15 this afternoon. Wind veering to north 15 this evening then diminishing to northeast 10 Monday morning. Wind becoming light near noon Monday.

Snow today. Scattered flurries Monday morning. Visibility 1 mile or less in snow.

Waves

Issued 03:00 AM EST 07 December 2025
Today Tonight and Monday. Waves 0.5 metres or less building to 0.5 to 1 near midnight then subsiding to 0.5 or less Monday morning.

Extended Forecast

Issued 03:00 AM EST 07 December 2025
Tuesday Wind south 15 knots veering to southwest 20 in the morning.
Wednesday Wind southwest 20 knots.
Thursday Wind northwest 15 knots.

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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 3:00 AM EST 7 December 2025 Today Tonight and Monday At 3:00 a.m. EST today low 1014 mb located over Illinois.
By 3:00 a.m. EST Monday departing low 1012 mb located south of
Nova Scotia.

At 3:00 a.m. EST today ridge located on a line northwest-southeast
over Saskatchewan.
By 3:00 a.m. EST Monday ridge located on a line north-south over
northwestern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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