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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 12 May 2025

Tonight and Tuesday.

Wind southwest 15 knots diminishing to light this evening then becoming northeast 10 to 15 late overnight. Wind veering to southeast 10 to 15 near noon Tuesday.

Extended Forecast

Issued 06:00 AM EDT 12 May 2025
Wednesday Wind southerly 10 to 15 knots.
Thursday Wind light.
Friday Wind northeast 10 to 15 knots becoming 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

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 12 May 2025 Tonight and Tuesday At 3:00 p.m. EDT today trough located over eastern Quebec.
By 8:00 a.m. EDT Tuesday departing trough located over Newfoundland.

At 3:00 p.m. EDT today ridge located on a line north-south over
Lake Ontario.
By 8:00 p.m. EDT Tuesday ridge located on a line north-south
over Gaspé.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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