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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 09 May 2026

Today Tonight and Sunday.

Strong wind warning in effect.

Wind light increasing to south 15 knots early this afternoon and to southwest 15 to 25 overnight. Wind diminishing to southwest 10 to 15 Sunday evening.

Showers overnight. Scattered showers Sunday evening.

Extended Forecast

Issued 06:00 AM EDT 09 May 2026
Monday Wind light.
Tuesday Wind light.
Wednesday Wind easterly 10 to 20 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)

Strong wind warning in effect

Cornwall to Montréal

Issued 03:00 AM EDT 09 May 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. 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 AM EDT 9 May 2026 Today Tonight and Sunday At 3:00 a.m. EDT today intensifying ridge located from Maine
to Labrador.
By 8:00 p.m. EDT Sunday ridge located on a line northeast-southwest
over eastern Newfoundland.

At 3:00 a.m. EDT today low 999 mb located over Lake Superior.
By 8:00 p.m. EDT Sunday low 999 mb located at 54.5N 73.5W.

At 3:00 a.m. EDT today cold front from low located on a line
northeast-southwest over the Midwestern states.
By 8:00 p.m. EDT Sunday cold front from low located on a line
northeast-southwest over Québec city.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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