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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 05 September 2026

Tonight and Sunday.

Strong wind warning in effect.

Wind northeast 10 to 15 knots increasing to northeast 15 to 25 late this afternoon then diminishing to northeast 10 to 15 near midnight. Wind becoming light Sunday morning then becoming northwest 10 to 15 Sunday afternoon. Wind becoming light Sunday evening.

Scattered showers ending near midnight with a risk of thunderstorms.

Extended Forecast

Issued 06:00 PM EDT 05 September 2026
Monday Wind light becoming westerly 10 to 15 knots in the afternoon.
Tuesday Wind northerly 10 to 15 knots diminishing to light.
Wednesday Wind light increasing to southwest 25 to 30 knots late in the day.

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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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Ice Conditions

There is no ice forecast issued for this area.

Warnings

Warnings (In effect)

Strong wind warning in effect

Cornwall to Montréal

Issued 3:00 PM EDT 05 September 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio.

Synopsis

Technical Marine Synopsis

Issued 3:00 PM EDT 5 September 2026 Tonight and Sunday At 3:00 p.m. EDT today quasi-stationary low 996 mb located east
of Cape Breton Island.

At 3:00 p.m. EDT today quasi-stationary ridge located from Lake
Superior to Labrador.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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