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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 06 September 2026

Today Tonight and Monday.

Wind northeast 10 to 15 knots becoming light this morning then becoming northwest 10 to 15 this afternoon. Wind becoming light this evening then becoming west 10 to 15 near noon Monday. Wind becoming light Monday evening.

Extended Forecast

Issued 06:00 AM EDT 06 September 2026
Tuesday Wind northerly 10 to 15 knots diminishing to light in the morning.
Wednesday Wind light increasing to southwest 25 to 30 knots late in the day.
Thursday Wind southwest 15 to 25 knots.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Hamilton Munro Int'l Airport CFB Trenton Erieau Toronto City Centre Airport Point Pelee Peterborough Municipal Airport Burlington Lift Bridge Point Petre Cobourg Oshawa Executive Airport South Lake Huron - 45149 Port Colborne Brockville 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 Windsor Airport Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Welland-Pelham Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Sarnia Chris Hadfield Airport Vineland Station Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Tobermory
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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 EDT 6 September 2026 Today Tonight and Monday At 3:00 a.m. EDT today low 995 mb located off Nova Scotia.
By 8:00 p.m. EDT Monday low 1000 mb located over Newfoundland.

At 3:00 a.m. EDT today high located near Lake Superior.
By 8:00 p.m. EDT Monday high located near Lake Ontario.

At 8:00 a.m. EDT Monday trough located from James Bay to Labrador.
By 8:00 p.m. EDT Monday trough located from Lake Saint-Jean to
Labrador.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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