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Cornwall to Montréal

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Marine Forecast

Issued 03:00 PM EST 11 December 2025

Tonight and Friday.

Wind west 20 to 30 knots tonight. Wind west 15 to 25 Friday.

Snow ending this evening. Visibility 1 mile or less in snow.

Low tonight minus 9. High Friday minus 3.

Extended Forecast

Issued 06:00 PM EST 11 December 2025
Saturday Wind southerly 10 to 15 knots.
Sunday Wind northwest 15 knots.
Monday Wind northwest 15 knots backing to southwest 15.

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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 11 December 2025 Tonight and Friday At 3:00 p.m. EST today low 980 mb located over Anticosti Island.
By 7:00 p.m. EST Friday low 972 mb located over Labrador Sea.

At 7:00 a.m. EST Friday ridge located on a line north-south over
Lake Superior.
By 7:00 p.m. EST Friday ridge located on a line north-south over
Lake Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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