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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EST 13 November 2025

Today Tonight and Friday.

Wind west 15 knots diminishing to west 10 near noon then backing to southwest 10 late overnight. Wind backing to south 10 Friday evening.

Waves

Issued 10:30 AM EST 13 November 2025
Today Tonight and Friday. Waves 0.5 to 1 metre subsiding to 0.5 or less this afternoon.

Extended Forecast

Issued 03:00 AM EST 13 November 2025
Saturday Wind light becoming south 15 knots in the morning then veering to west 15 late in the day.
Sunday Wind northwest 20 knots.
Monday Wind northwest 20 knots diminishing to 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 10:30 AM EST 13 November 2025 Today Tonight and Friday At 10:30 a.m. EST today departing trough located on a line
north-south over Hudson Bay.

At 10:30 a.m. EST today ridge located on a line northwest-southeast
over Minnesota.
By 10:30 a.m. EST Friday ridge located on a line north-south over
northeastern Ontario.

By 10:30 a.m. EST Friday approaching trough located on a line
north-south over western Manitoba.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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