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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 01 April 2025

Today Tonight and Wednesday.

Wind northwesterly 15 to 25 knots diminishing to northwest 10 to 15 early this evening then becoming light near midnight. Wind becoming northeast 10 to 15 near noon Wednesday.

Scattered flurries Wednesday evening.

High today plus 1. Low tonight minus 10. High Wednesday zero.

Extended Forecast

Issued 06:00 AM EDT 01 April 2025
Thursday Wind easterly 15 to 25 knots becoming southwest 15 to 25 in the afternoon.
Friday Wind west 15 knots.
Saturday Wind light.

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Map of Great Lakes - Lake Erie and Lake Ontario 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
Legend:
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 1 April 2025 Today Tonight and Wednesday At 3:00 a.m. EDT today low 996 mb located near Pointe-des-Monts.
By 8:00 a.m. EDT Wednesday departing low 980 mb located over
Labrador Sea.

At 3:00 a.m. EDT today ridge located on a line north-south over
Lake Superior.
By 8:00 p.m. EDT Wednesday ridge located on a line north-south
over Rimouski.

At 8:00 p.m. EDT Wednesday approaching low 988 mb located over
the Midwestern states.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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