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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 02 July 2025

Today Tonight and Thursday.

Wind light increasing to westerly 15 to 20 knots early this morning then diminishing to southwest 10 to 15 early this evening. Wind veering to northwest 10 to 15 Thursday morning.

Scattered showers this afternoon and this evening. Showers Thursday with a risk of thunderstorms.

Extended Forecast

Issued 06:00 AM EDT 02 July 2025
Friday Wind west 15 knots.
Saturday Wind southwest 10 to 15 knots.
Sunday Wind southwest 20 knots veering to northwest 15 late in the day.

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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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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 2 July 2025 Today Tonight and Thursday At 3:00 a.m. EDT today dissipating trough located on a line
northeast-southwest over Gaspé.

At 3:00 a.m. EDT today trough located on a line northeast-southwest
over northern Ontario.
By 8:00 p.m. EDT Thursday trough located on a line north-south
over Anticosti Island.

At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over Lake Superior.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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