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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 14 July 2025

Today Tonight and Tuesday.

Wind light becoming southwest 10 to 15 knots this morning then becoming light this evening. Wind becoming southwest 10 to 15 near noon Tuesday then becoming light Tuesday evening.

Extended Forecast

Issued 06:00 AM EDT 14 July 2025
Wednesday Wind light becoming southwest 10 to 15 knots in the morning.
Thursday Wind light increasing to southwest 10 to 20 knots late in the day.
Friday Wind northwest 10 to 15 knots.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Burlington Lift Bridge Oshawa Executive Airport Point Pelee Peterborough Municipal Airport Point Petre Hamilton Munro Int'l Airport Erieau Cobourg Toronto City Centre Airport Port Colborne CFB Trenton South Lake Huron - 45149 Windsor Airport Great Duck Island Gore Bay-Manitoulin Airport North Bay Airport Greater Sudbury Airport Killarney Sault Ste. Marie Airport Ajax - 45159 North Channel - 45154 Lake Nipissing - 45152 Lake Simcoe - 45151 Welland-Pelham Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Vineland Station Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Cove Island Goderich Sarnia Chris Hadfield Airport Western Islands Tobermory Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal
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buoy Buoy
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 14 July 2025 Today Tonight and Tuesday At 3:00 a.m. EDT today trough located on a line northwest-southeast
over Lake Superior.
By 8:00 p.m. EDT Tuesday trough located on a line
northeast-southwest over Havre Saint-Pierre.

At 8:00 a.m. EDT Tuesday ridge located on a line northeast-southwest
over Montréal.
By 8:00 p.m. EDT Tuesday ridge located on a line east-west over
James Bay.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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