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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 28 April 2025

Today Tonight and Tuesday.

Wind light becoming southwest 10 to 15 knots this morning then becoming light this evening. Wind increasing to southwest 10 to 20 Tuesday morning and to southwest 20 to 30 Tuesday afternoon.

Scattered showers Tuesday afternoon and evening. Visibility as low as 1 mile in showers.

Extended Forecast

Issued 06:00 AM EDT 28 April 2025
Wednesday Wind northwest 20 to 30 knots diminishing to light in the afternoon.
Thursday Wind light.
Friday Wind northeast 10 to 20 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 PM EDT 27 April 2025 Tonight and Monday At 3:00 p.m. EDT today low 1002 mb located over Nova Scotia.
By 8:00 p.m. EDT Monday departing low 1012 mb located off Nova
Scotia.

At 3:00 p.m. EDT today ridge located from the Great Lakes to
James Bay.
By 8:00 p.m. EDT Monday ridge located from Cape Hatteras to the
Quebec Lower North Shore.

At 8:00 p.m. EDT Monday approaching trough located on a line
northeast-southwest over James Bay.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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