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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EST 18 November 2025

Tonight and Wednesday.

Wind west 15 to 25 knots diminishing to west 10 to 15 early this evening then becoming light near midnight. Wind becoming southwest 10 to 15 near noon Wednesday.

Low tonight minus 4. High Wednesday plus 1.

Extended Forecast

Issued 06:00 PM EST 18 November 2025
Thursday Wind light.
Friday Wind light increasing to west 15 to 25 knots late in the day.
Saturday Wind westerly 10 to 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

There is no ice forecast issued for this area.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 PM EST 18 November 2025 Tonight and Wednesday At 3:00 p.m. EST today low 976 mb located over northern Labrador.
By 7:00 p.m. EST Wednesday low 989 mb located east of Ungava Bay.

At 3:00 p.m. EST today high 1024 mb located over the Great Lakes.
By 7:00 p.m. EST Wednesday high 1027 mb located near Cornwall.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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