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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 11 May 2026

Today Tonight and Tuesday.

Wind light becoming northwesterly 15 knots this afternoon then diminishing to light this evening. Wind becoming west 10 to 15 Tuesday afternoon then diminishing to light Tuesday evening.

Scattered showers this afternoon and this evening with a risk of thunderstorms.

Extended Forecast

Issued 06:00 PM EDT 10 May 2026
Tuesday Wind light.
Wednesday Wind easterly 15 knots veering to southerly 15 to 20.
Thursday Wind southerly 15 to 20 knots diminishing to light.

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Map of Great Lakes - Lake Huron marine weather areas Wiarton Airport Western Islands Cove Island Goderich Lake Simcoe Regional Airport Vineland Station Parry Sound Harbour Sarnia Chris Hadfield Airport Tobermory Muskoka Airport Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Lagoon City Southeast Shoal Burlington Lift Bridge Welland-Pelham Windsor Airport Port Colborne Erieau Peterborough Municipal Airport CFB Trenton Toronto City Centre Airport Point Petre Oshawa Executive Airport Hamilton Munro Int'l Airport Point Pelee Cobourg Port Colborne - 45142 North Channel - 45154 Ajax - 45159 Lake Nipissing - 45152 Sault Ste. Marie Airport Killarney Lake Simcoe - 45151 Greater Sudbury Airport South Lake Huron - 45149 Lake St Clair - 45147 North Bay Airport South Georgian Bay - 45143 Gore Bay-Manitoulin Airport Grimsby - 45139 Georgian Bay - 45137 Great Duck Island Collingwood Kingston Airport Grenadier Island Brockville Prince Edward Point - 45135 Port Stanley - 45132
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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 EDT 11 May 2026 Today Tonight and Tuesday At 3:00 a.m. EDT today cold front located on a line north-south
over Sept-Îles.
By 8:00 a.m. EDT Tuesday dissipating cold front located on a line
northwest-southeast over Labrador Sea.

At 3:00 a.m. EDT today high 1026 mb located over northern Ontario.
By 8:00 p.m. EDT Tuesday high 1021 mb located 240 miles north of
Lake Saint-Jean.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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