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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 12 April 2026

Tonight and Monday.

Gale warning in effect.

Wind light increasing to southeast 10 to 15 knots near midnight and to southwest 15 to 25 early Monday morning. Wind increasing to southwest 25 to 35 late Monday morning then diminishing to west 15 Monday evening.

Rain this afternoon tonight and Monday.

Extended Forecast

Issued 06:00 PM EDT 12 April 2026
Tuesday Wind northeast 10 to 15 knots.
Wednesday Wind light.
Thursday Wind northeast 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

Warnings (In effect)

Gale warning in effect

Cornwall to Montréal

Issued 3:00 PM EDT 12 April 2026

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 PM EDT 12 April 2026 Tonight and Monday At 3:00 p.m. EDT today ridge located from Maine to Ungava Bay.
By 10:00 a.m. EDT Monday departing ridge located from Newfoundland
to Labrador Sea.

At 3:00 p.m. EDT today low 993 mb located west of Lake Superior.
By 8:00 p.m. EDT Monday low 1000 mb located near Pointe-des-Monts.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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