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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EST 08 November 2025

Tonight and Sunday.

Wind west 15 knots diminishing to light early this evening then increasing to northeast 10 to 15 early Sunday morning. Wind increasing to northeast 15 to 25 near noon Sunday then becoming north 15 Sunday evening.

Snow Sunday becoming rain or snow. Visibility 1 mile or less in precipitation.

Temperatures plus 3 falling to minus 2 Sunday afternoon.

Extended Forecast

Issued 06:00 AM EST 08 November 2025
Monday Wind light becoming west 15 knots in the afternoon.
Tuesday Wind west 15 knots.
Wednesday 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 8 November 2025 Tonight and Sunday At 3:00 p.m. EST today low 998 mb located near Sept-Îles.
By 7:00 a.m. EST Sunday departing low 1001 mb located east of
Newfoundland.

At 3:00 p.m. EST today ridge located north of Lake Superior.
By 7:00 p.m. EST Sunday ridge located from Lake Superior to
Labrador.

At 7:00 p.m. EST tonight building low located over the Midwestern
states.
By 7:00 p.m. EST Sunday low 1007 mb located south of Quebec.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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