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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EST 07 November 2025

Tonight and Saturday.

Wind southeasterly 15 knots increasing to southwest 20 to 30 near midnight then diminishing to northwesterly 15 early Saturday afternoon.

Rain ending Saturday morning. Visibility as low as 1 mile in rain.

Extended Forecast

Issued 06:00 PM EST 07 November 2025
Sunday Wind light becoming northeast 15 knots in the morning.
Monday Wind northeast 15 knots becoming southwest 10 to 15.
Tuesday Wind west 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 EST 7 November 2025 Tonight and Saturday At 3:00 p.m. EST today ridge located on a line northwest-southeast
over Rimouski.
By 4:00 p.m. EST Saturday ridge located on a line
northwest-southeast over the Strait of Belle Isle.

At 3:00 p.m. EST today low 991 mb located near Lake Huron.
By 7:00 p.m. EST Saturday low 1001 mb located near Natashquan.

At 3:00 p.m. EST today ridge located on a line east-west over
northern Ontario.
By 7:00 p.m. EST Saturday ridge located from Lake Superior to
Saguenay River.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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