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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 04 May 2025

Today Tonight and Monday.

Wind light becoming northeast 15 knots near midnight then veering to southeast 10 to 15 Monday afternoon.

Scattered showers Monday evening.

Extended Forecast

Issued 06:00 AM EDT 04 May 2025
Tuesday Wind easterly 10 to 15 knots.
Wednesday Wind light becoming northwest 15 knots.
Thursday Wind north 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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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 4 May 2025 Today Tonight and Monday At 3:00 a.m. EDT today ridge located from the Great Lakes to
Saguenay River.
By 8:00 p.m. EDT Monday ridge located over Îles-de-la-Madeleine.

At 10:00 a.m. EDT today trough located west of Sept-Îles.
By 11:00 p.m. EDT tonight departing trough located over the Strait
of Belle Isle.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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