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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 13 June 2026

Tonight and Sunday.

Strong wind warning in effect.

Wind west 15 to 25 knots diminishing to west 10 to 15 this evening then increasing to southwest 15 to 25 Sunday morning. Wind diminishing to southwest 10 to 15 Sunday evening.

Showers overnight and Sunday with a risk of thunderstorms. Visibility as low as 1 mile in showers.

Extended Forecast

Issued 06:00 PM EDT 13 June 2026
Monday Wind southwest 10 to 15 knots increasing to southwest 15 to 25 in the morning.
Tuesday Wind southwest 10 to 20 knots.
Wednesday Wind southwest 10 to 15 knots becoming light late in the day.

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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 11:21 PM EDT 13 June 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.

Watches (In effect)

Squall watch in effect

Cornwall to Montréal

Issued 02:27 AM EDT 14 June 2026 Conditions are favourable for the development of squalls with wind gusts up to 35 knots.



Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway.

Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 PM EDT 13 June 2026 Tonight and Sunday At 3:00 p.m. EDT today dissipating trough located on a line
northwest-southeast over Lake Saint-Jean.

At 3:00 p.m. EDT today trough located on a line north-south over
the Great Lakes.
By 8:00 p.m. EDT Sunday trough located on a line north-south
over Montréal.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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