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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 01 May 2025

Today Tonight and Friday.

Strong wind warning in effect.

Wind light becoming northeast 10 to 15 knots this afternoon then veering to southeast 15 Friday morning. Wind increasing to southwest 20 to 30 Friday afternoon.

Periods of rain overnight and Friday.

Extended Forecast

Issued 06:00 PM EDT 30 April 2025
Friday Wind easterly 20 to 30 knots becoming southwest 25 to 35 late in the day.
Saturday Wind southwest 15 to 25 knots diminishing to light.
Sunday Wind northwest 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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buoy Buoy
land station Land Station
Ice Conditions

There is no ice forecast issued for this area.

Warnings

Warnings (In effect)

Strong wind warning in effect

Cornwall to Montréal

Issued 03:00 AM EDT 01 May 2025

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 1 May 2025 Today Tonight and Friday At 3:00 a.m. EDT today low 994 mb located over Newfoundland.
By 8:00 p.m. EDT tonight departing low 995 mb located off
Newfoundland.

At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over Lake Saint-Jean.
By 8:00 p.m. EDT Friday departing ridge located on a line
north-south over Labrador Coast.

At 3:00 a.m. EDT today low 1004 mb located over the Midwestern
states.
By 8:00 p.m. EDT Friday low 1001 mb located over Lake Saint-Jean.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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