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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 04 September 2026

Today Tonight and Saturday.

Wind light becoming northwest 10 to 15 knots this morning then becoming light early this evening. Wind becoming northeast 10 to 15 Saturday evening.

Scattered showers this afternoon tonight and Saturday. Fog banks dissipating this morning.

Extended Forecast

Issued 06:00 AM EDT 04 September 2026
Sunday Wind northeast 10 to 15 knots becoming light in the morning.
Monday Wind light becoming westerly 10 to 15 knots.
Tuesday Wind northerly 10 to 15 knots diminishing to light.

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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 4 September 2026 Today Tonight and Saturday At 3:00 a.m. EDT today building low 1009 mb located over the Gulf
of Maine.
By 8:00 p.m. EDT Saturday low 995 mb located near Sable Island.

At 3:00 a.m. EDT today trough from low located on a line
northwest-southeast over Québec city.
By 8:00 p.m. EDT Saturday trough from low located on a line
northwest-southeast over Cornwall.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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