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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 26 October 2026

Today Tonight and Tuesday.

Wind southwest 15 knots veering to northwest 10 to 20 this afternoon then becoming light near midnight. Wind light Tuesday.

Scattered showers today.

High today plus 15. Low tonight zero. High Tuesday plus 7.

Extended Forecast

Issued 06:00 PM EDT 25 October 2026
Tuesday Wind northwest 10 to 15 knots diminishing to light in the afternoon.
Wednesday Wind light.
Thursday Wind light becoming southwest 10 to 15 knots.

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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 26 October 2026 Today Tonight and Tuesday At 3:00 a.m. EDT today trough located from Labrador to Lake Huron.
By 8:00 p.m. EDT tonight departing trough located on a line
northeast-southwest over Nova Scotia.

At 3:00 a.m. EDT today high 1039 mb located over Manitoba.
By 8:00 p.m. EDT Tuesday high 1032 mb located over southern Quebec.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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