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Cornwall to Montréal

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Marine Forecast

Issued 03:00 AM EST 13 December 2025

Today Tonight and Sunday.

Wind light becoming southwest 10 to 15 knots early this evening. Wind southwesterly 10 to 15 Sunday.

Flurries today and this evening. Visibility 1 mile or less in flurries.

Temperatures minus 9 rising to minus 3 this afternoon then falling to minus 8 Sunday morning.

Extended Forecast

Issued 06:00 AM EST 13 December 2025
Monday Wind southwest 15 to 20 knots.
Tuesday Wind southwest 15 to 20 knots.
Wednesday Wind southwest 15 to 25 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

There is no ice forecast issued for this area.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EST 13 December 2025 Today Tonight and Sunday At 3:00 a.m. EST today ridge located over Montréal.
By 7:00 p.m. EST tonight dissipating ridge located over Matane.

At 3:00 a.m. EST today low 1004 mb located over western Ontario.
By 3:00 a.m. EST Sunday dissipating low 1013 mb located over
Québec city.

At 7:00 a.m. EST Sunday ridge located from the Midwestern states
to Hudson Bay.
By 7:00 p.m. EST Sunday ridge located from the Great Lakes to
Ungava Bay.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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