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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 21 May 2025

Tonight and Thursday.

Wind southeasterly 10 to 15 knots increasing to southeasterly 15 to 20 Thursday morning then diminishing to southeasterly 10 to 15 Thursday evening.

Scattered showers this afternoon. Showers Thursday.

Extended Forecast

Issued 06:00 AM EDT 21 May 2025
Friday Wind northeast 15 to 25 knots.
Saturday Wind northeast 15 knots backing to northwest 15.
Sunday Wind light becoming northerly 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 EDT 21 May 2025 Tonight and Thursday At 3:00 p.m. EDT today ridge located on a line north-south over
Sept-Îles.
By 8:00 p.m. EDT Thursday ridge located on a line
northwest-southeast over the Strait of Belle Isle.

At 3:00 p.m. EDT today quasi-stationary low 1002 mb located south
of Lake Erie.

Great Lakes - Lake Huron Area

Another Region

Marine Weather for Canada

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