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Cornwall to Montréal

Forecast

Marine Forecast

Issued 03:00 AM EST 09 November 2025

Today Tonight and Monday.

Wind light increasing to northeast 10 to 15 knots early this morning and to northeast 15 to 25 near noon. Wind becoming northwesterly 15 this evening then backing to southwest 15 to 20 Monday morning.

Snow beginning this morning becoming rain or snow this evening then flurries Monday morning. Visibility 1 mile or less in precipitation.

Temperatures minus 4 rising to plus 2 overnight.

Extended Forecast

Issued 06:00 AM EST 09 November 2025
Tuesday Wind west 15 to 25 knots.
Wednesday Wind southwest 15 knots.
Thursday Wind southwest 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 AM EST 9 November 2025 Today Tonight and Monday At 3:00 a.m. EST today ridge located from Lake Superior to Labrador.
By 1:00 p.m. EST Monday ridge located from Labrador to Newfoundland.

At 3:00 a.m. EST today building low located over southern Lake Erie.
By 7:00 p.m. EST Monday low 998 mb located south of Maine.

Great Lakes - Lake Huron Area

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