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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 11 August 2026

Today Tonight and Wednesday.

Wind west 15 knots diminishing to light this evening then becoming west 10 to 15 Wednesday morning. Wind becoming light Wednesday evening.

Scattered showers Wednesday late in the day with a risk of thunderstorms.

Extended Forecast

Issued 06:00 AM EDT 11 August 2026
Thursday Wind light becoming southwest 10 to 15 knots in the morning.
Friday Wind light becoming northwest 10 to 15 knots.
Saturday Wind light.

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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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 11 August 2026 Today Tonight and Wednesday At 3:00 a.m. EDT today departing trough located from Labrador to
the Quebec Lower North Shore.

At 3:00 a.m. EDT today low 1007 mb located near Lake Saint-Jean.
By 8:00 p.m. EDT Wednesday low 997 mb located over the Quebec
Lower North Shore.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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