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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 22 March 2025

Today Tonight and Sunday.

Wind light increasing to southwest 20 to 30 knots near noon then veering to northwest 20 to 30 early this evening. Wind diminishing to west 10 to 20 overnight then becoming light Sunday morning.

Showers this afternoon.

High today plus 9. Low tonight minus 10. High Sunday minus 2.

Extended Forecast

Issued 06:00 AM EDT 22 March 2025
Monday Wind northeast 15 to 25 knots.
Tuesday Wind southwest 10 to 15 knots increasing to southwest 15 to 25.
Wednesday Wind southwest 10 to 15 knots becoming northeast 10 to 15.

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Map of Great Lakes - Lake Huron marine weather areas Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Great Duck Island Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Cove Island Goderich Sarnia Chris Hadfield Airport Tobermory Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal Vineland Station Welland-Pelham Windsor Airport Port Colborne Erieau Point Pelee Burlington Lift Bridge Cobourg Hamilton Munro Int'l Airport Oshawa Executive Airport Point Petre Toronto City Centre Airport CFB Trenton Peterborough Municipal Airport
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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 22 March 2025 Today Tonight and Sunday At 3:00 a.m. EDT today low 987 mb located over Prince Edward Island.
By 8:00 p.m. EDT Sunday low 978 mb located over Labrador Sea.

At 3:00 a.m. EDT today dissipating ridge located on a line
north-south over Saguenay River.

At 3:00 a.m. EDT today trough located on a line northeast-southwest
over Lake Huron.
By 8:00 p.m. EDT Sunday trough located on a line north-south over
Cape Breton Island.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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