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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 11 April 2026

Tonight and Sunday.

Wind northwest 15 knots diminishing to light early this evening then becoming southeast 10 to 15 early Sunday afternoon.

Rain Sunday evening.

Low tonight minus 3. High Sunday plus 8.

Extended Forecast

Issued 06:00 PM EDT 11 April 2026
Monday Wind southeast 10 to 15 knots increasing to southwest 20 to 30 in the morning.
Tuesday Wind northeast 15 knots.
Wednesday Wind northeast 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 11 April 2026 Tonight and Sunday At 3:00 p.m. EDT today low 1007 mb located over the Gulf of
St. Lawrence.
By 6:00 a.m. EDT Sunday departing low 1000 mb located over
Newfoundland.

At 3:00 p.m. EDT today high 1032 mb located from the Great Lakes
to Hudson Bay.
By 8:00 p.m. EDT Sunday high 1033 mb located from the East Coast
of the U.S. to Labrador.

At 8:00 p.m. EDT Sunday approaching low 992 mb located west of
Lake Superior.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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