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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 05 September 2026

Today Tonight and Sunday.

Strong wind warning in effect.

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

Scattered showers ending near midnight.

Extended Forecast

Issued 06:00 AM 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 Huron marine weather areas Erieau CFB Trenton Muskoka Airport Parry Sound Harbour Toronto City Centre Airport Lake Simcoe Regional Airport Wiarton Airport Point Petre Lagoon City Western Islands Cobourg Port Colborne Windsor Airport Point Pelee Welland-Pelham Vineland Station Burlington Lift Bridge Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Harrow AAFC Hamilton Munro Int'l Airport Tobermory Sarnia Chris Hadfield Airport Oshawa Executive Airport Collingwood Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Peterborough Municipal Airport Brockville Grenadier Island Kingston Airport
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land station Land Station
Ice Conditions

There is no ice forecast issued for this area.

Warnings

Warnings (In effect)

Strong wind warning in effect

Cornwall to Montréal

Issued 12:43 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 AM EDT 5 September 2026 Today Tonight and Sunday At 3:00 a.m. EDT today building low 998 mb located over the Gulf
of Maine.
By 8:00 p.m. EDT Sunday low 998 mb located off Newfoundland.

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

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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