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Cornwall to Montréal

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Marine Forecast

Issued 03:00 PM EST 05 December 2025

Tonight and Saturday.

Wind light increasing to southerly 10 to 15 knots Saturday morning then veering to southwest 15 to 20 Saturday evening.

Flurries Saturday. Visibility as low as 1 mile in flurries.

Low tonight minus 11. High Saturday zero.

Extended Forecast

Issued 06:00 PM EST 05 December 2025
Sunday Wind northwest 10 to 15 knots becoming light in the morning.
Monday Wind northwest 10 to 15 knots backing to southwest 10 to 15 late in the day.
Tuesday Wind light.

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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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buoy Buoy
land station Land Station
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 5 December 2025 Tonight and Saturday At 3:00 p.m. EST today departing low 967 mb located east of
Newfoundland.

At 3:00 p.m. EST today ridge located on a line north-south over
Rimouski.
By 7:00 p.m. EST Saturday ridge located on a line north-south over
the Quebec Lower North Shore.

At 3:00 p.m. EST today trough located on a line northeast-southwest
over northern Ontario.
By 7:00 p.m. EST Saturday trough located on a line
northeast-southwest over Lake Saint-Jean.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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