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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EST 12 November 2025

Tonight and Thursday.

Wind light tonight and Thursday.

Flurries or showers. Visibility as low as 1 mile in precipitation.

Extended Forecast

Issued 06:00 PM EST 12 November 2025
Friday Wind light becoming northwest 10 to 15 knots in the morning.
Saturday Wind light becoming southwest 10 to 15 knots.
Sunday Wind northeast 10 to 15 knots increasing to westerly 15 to 20.

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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 12 November 2025 Tonight and Thursday At 3:00 p.m. EST today low 959 mb located over Labrador.
By 7:00 a.m. EST Thursday departing low 977 mb located north of
Ungava Bay.

At 3:00 p.m. EST today low 997 mb located southwest of Quebec.
By 7:00 p.m. EST Thursday low 988 mb located south of Newfoundland.

At 3:00 p.m. EST today ridge located from the Great Lakes to
Hudson Bay.
By 7:00 p.m. EST Thursday ridge located from the Great Lakes
to Labrador.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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