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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 19 April 2026

Tonight and Monday.

Wind west 10 to 15 knots becoming light Monday evening.

Temperatures plus 3 falling to minus 2 Monday morning then rising to plus 3 Monday evening.

Extended Forecast

Issued 06:00 PM EDT 19 April 2026
Tuesday Wind light.
Wednesday Wind light.
Thursday Wind light becoming northwest 10 to 15 knots.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas CFB Trenton Port Colborne - 45142 Hamilton Munro Int'l Airport Oshawa Executive Airport Port Stanley - 45132 Lake Nipissing - 45152 Point Petre Georgian Bay - 45137 Toronto City Centre Airport Lake Simcoe - 45151 South Georgian Bay - 45143 Prince Edward Point - 45135 Peterborough Municipal Airport South Lake Huron - 45149 Collingwood Lake St Clair - 45147 Grimsby - 45139 Goderich Lagoon City Kingston Airport Muskoka Airport Parry Sound Harbour Grenadier Island Lake Simcoe Regional Airport Wiarton Airport Brockville Western Islands Cove Island Great Duck Island North Channel - 45154 Sarnia Chris Hadfield Airport Gore Bay-Manitoulin Airport Tobermory Harrow AAFC Long Point North Bay Airport Port Weller St. Catharines / Niagara District Airport Greater Sudbury Airport Southeast Shoal Vineland Station Port Colborne Erieau Cobourg Sault Ste. Marie Airport Windsor Airport Welland-Pelham Killarney Ajax - 45159 Point Pelee Burlington Lift Bridge
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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 19 April 2026 Tonight and Monday At 3:00 p.m. EDT today trough located on a line north-south over
Sept-Îles.
By 8:00 p.m. EDT Monday trough located on a line north-south over
Labrador Sea.

At 3:00 p.m. EDT today ridge located on a line northeast-southwest
over western Quebec.
By 8:00 p.m. EDT Monday ridge located from Lake Erie to Lake
Saint-Jean.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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