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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 06:09 AM EDT 08 October 2026

Today Tonight and Friday.

Strong wind warning in effect.

Wind southwest 10 to 15 knots increasing to westerly 15 to 25 this morning then diminishing to southwest 10 to 15 early this evening. Wind increasing to west 15 to 20 Friday morning then diminishing to northwest 10 to 15 Friday evening.

Scattered showers. Risk of thunderstorms this morning.

Extended Forecast

Issued 06:00 AM EDT 08 October 2026
Saturday Wind westerly 10 to 15 knots becoming light late in the day.
Sunday Wind light increasing to southwest 15 to 25 knots.
Monday Wind southwest 10 to 15 knots increasing to northeast 15 to 20 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 06:09 AM EDT 08 October 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 11:40 AM EDT 8 October 2026 Today Tonight and Friday At 3:00 a.m. EDT today departing ridge located on a line
northwest-southeast over the Strait of Belle Isle.

At 3:00 a.m. EDT today trough located on a line north-south over
Cornwall.
By 8:00 p.m. EDT Friday trough located on a line northwest-southeast
over Labrador Sea.

At 8:00 p.m. EDT Friday approaching ridge located on a line
northwest-southeast over Lake Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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