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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 10 May 2026

Tonight and Monday.

Strong wind warning in effect.

Wind southwest 15 to 25 knots diminishing to west 10 to 15 early this evening then becoming light near midnight. Wind becoming northwest 10 to 15 Monday afternoon then diminishing to light Monday evening.

Scattered showers tonight.

Extended Forecast

Issued 06:00 PM EDT 10 May 2026
Tuesday Wind light.
Wednesday Wind easterly 15 knots veering to southerly 15 to 20.
Thursday Wind southerly 15 to 20 knots diminishing to light.

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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 3:00 PM EDT 10 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 PM EDT 10 May 2026 Tonight and Monday At 3:00 p.m. EDT today low 994 mb located east of James Bay.
By 8:00 p.m. EDT Monday departing low 999 mb located near Hudson
Strait.

At 3:00 p.m. EDT today cold front from low located on a line
northeast-southwest over Rimouski.
By 8:00 p.m. EDT Monday cold front from low located on a line
north-south over Natashquan.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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