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Cornwall to Montréal

Forecast

Marine Forecast

Issued 03:00 AM EDT 26 October 2026

Today Tonight and Tuesday.

Wind southwest 15 knots veering to northwest 10 to 20 this afternoon then becoming light near midnight. Wind light Tuesday.

Scattered showers today.

High today plus 15. Low tonight zero. High Tuesday plus 7.

Extended Forecast

Issued 06:00 AM EDT 26 October 2026
Wednesday Wind light.
Thursday Wind light becoming southwest 10 to 15 knots.
Friday Wind southwest 10 to 15 knots veering to northwest 10 to 15.

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Weather Conditions

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

At 3:00 a.m. EDT today high 1039 mb located over Manitoba.
By 8:00 p.m. EDT Tuesday high 1032 mb located over southern Quebec.

Great Lakes - Lake Huron Area

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