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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 04:18 PM EDT 20 May 2026

Tonight and Thursday.

Strong wind warning in effect.

Wind west 15 to 25 knots becoming northwest 15 this evening then diminishing to light early Thursday morning.

Extended Forecast

Issued 06:00 PM EDT 20 May 2026
Friday Wind light.
Saturday Wind light becoming southeast 15 knots.
Sunday Wind southeast 20 knots.

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Map of Great Lakes - Lake Huron marine weather areas Wiarton Airport Western Islands Cove Island Goderich Lake Simcoe Regional Airport Vineland Station Parry Sound Harbour Sarnia Chris Hadfield Airport Tobermory Muskoka Airport Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Lagoon City Southeast Shoal Burlington Lift Bridge Welland-Pelham Windsor Airport Port Colborne Erieau Peterborough Municipal Airport CFB Trenton Toronto City Centre Airport Point Petre Oshawa Executive Airport Hamilton Munro Int'l Airport Point Pelee Cobourg Port Colborne - 45142 North Channel - 45154 Ajax - 45159 Lake Nipissing - 45152 Sault Ste. Marie Airport Killarney Lake Simcoe - 45151 Greater Sudbury Airport South Lake Huron - 45149 Lake St Clair - 45147 North Bay Airport South Georgian Bay - 45143 Gore Bay-Manitoulin Airport Grimsby - 45139 Georgian Bay - 45137 Great Duck Island Collingwood Kingston Airport Grenadier Island Brockville Prince Edward Point - 45135 Port Stanley - 45132
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Ice Conditions

There is no ice forecast issued for this area.

Warnings

Warnings (In effect)

Strong wind warning in effect

Cornwall to Montréal

Issued 4:18 PM EDT 20 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 20 May 2026 Tonight and Thursday At 3:00 p.m. EDT today trough located on a line northeast-southwest
over the Gaspe Peninsula.
By 1:00 a.m. EDT Thursday departing trough located on a line
northeast-southwest over Newfoundland.

At 3:00 p.m. EDT today ridge located on a line north-south over
northwestern Ontario.
By 8:00 p.m. EDT Thursday ridge located from James Bay to Rimouski.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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