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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 09 June 2026

Today Tonight and Wednesday.

Wind light becoming southwest 10 to 15 knots Wednesday afternoon then diminishing to light Wednesday evening.

Showers Wednesday late in the day with a risk of thunderstorms. Visibility as low as 1 mile in showers.

Extended Forecast

Issued 06:00 AM EDT 09 June 2026
Thursday Wind light becoming southwest 10 to 15 knots in the morning.
Friday Wind light becoming southwest 15 knots late in the day.
Saturday Wind west 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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 9 June 2026 Today Tonight and Wednesday At 3:00 a.m. EDT today ridge located on a line north-south over
Cornwall.
By 8:00 a.m. EDT Wednesday dissipating ridge located on a line
northwest-southeast over Québec city.

At 3:00 a.m. EDT today low 1012 mb located west of Lake Michigan.
By 8:00 p.m. EDT Wednesday low 1005 mb located northeast of
Lake Huron.

At 8:00 p.m. EDT tonight building low 1007 mb located near
Sept-Îles.
By 8:00 p.m. EDT Wednesday low 1007 mb located over New Brunswick.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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