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Cornwall to Montréal

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Forecast

Marine Forecast

Issued 03:00 PM EST 14 December 2025

Tonight and Monday.

Wind westerly 15 knots increasing to southwest 15 to 25 near noon Monday then diminishing to southwest 10 to 15 Monday evening.

Scattered flurries Monday evening. Visibility as low as 1 mile in flurries.

Low tonight minus 12. High Monday minus 6.

Extended Forecast

Issued 06:00 PM EST 14 December 2025
Tuesday Wind southwest 10 to 20 knots.
Wednesday Wind southwest 15 to 25 knots.
Thursday Wind light increasing to south 15 to 25 knots.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Burlington Lift Bridge Oshawa Executive Airport Point Pelee Peterborough Municipal Airport Point Petre Hamilton Munro Int'l Airport Erieau Cobourg Toronto City Centre Airport Port Colborne CFB Trenton South Lake Huron - 45149 Windsor Airport Great Duck Island Gore Bay-Manitoulin Airport North Bay Airport Greater Sudbury Airport Killarney Sault Ste. Marie Airport Ajax - 45159 North Channel - 45154 Lake Nipissing - 45152 Lake Simcoe - 45151 Welland-Pelham Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Vineland Station Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Cove Island Goderich Sarnia Chris Hadfield Airport Western Islands Tobermory Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal
Legend:
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 14 December 2025 Tonight and Monday At 3:00 p.m. EST today dissipating trough located on a line
northwest-southeast over Rivière-du-Loup.

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

At 3:00 p.m. EST today intensifying low 1011 mb located southeast
of Cape Cod.
By 7:00 p.m. EST Monday low 955 mb located over eastern
Newfoundland.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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