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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 12 January 2026

Today Tonight and Tuesday.

Wind west 15 to 25 knots backing to southwest 10 to 20 this morning. Wind southwest 10 to 20 tonight and Tuesday.

Periods of snow this afternoon and tonight. Rain Tuesday evening. Visibility as low as 1 mile in precipitation.

Temperatures minus 7 rising to plus 2 near noon Tuesday.

Extended Forecast

Issued 06:00 AM EST 12 January 2026
Wednesday Wind southwest 15 to 25 knots.
Thursday Wind westerly 15 to 25 knots.
Friday Wind west 15 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 AM EST 12 January 2026 Today Tonight and Tuesday At 3:00 a.m. EST today low 975 mb located south of Newfoundland.
By 7:00 p.m. EST tonight departing low 957 mb located off
Newfoundland.

At 3:00 a.m. EST today ridge located from Lake Erie to Ungava Bay.
By 7:00 p.m. EST Tuesday weakening ridge located on a line
northwest-southeast over Anticosti Island.

At 7:00 p.m. EST Tuesday approaching low 992 mb located north of
the Great Lakes.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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