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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 20 September 2026

Tonight and Monday.

Wind light becoming north 10 to 15 knots late overnight then becoming light Monday morning. Wind becoming northeast 10 to 15 Monday evening.

Extended Forecast

Issued 06:00 PM EDT 20 September 2026
Tuesday Wind northeast 10 to 15 knots.
Wednesday Wind light.
Thursday Wind 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 PM EDT 20 September 2026 Tonight and Monday At 3:00 p.m. EDT today trough located on a line northeast-southwest
over western Lake Saint-Jean.
By 8:00 p.m. EDT Monday departing trough located on a line
northeast-southwest over Newfoundland.

At 3:00 p.m. EDT today high 1028 mb located over Ontario.
By 8:00 p.m. EDT Monday high 1036 mb located over Quebec.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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