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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 08 November 2025

Today Tonight and Sunday.

Wind west 15 to 25 knots becoming west 15 near noon then diminishing to light early this evening. Wind increasing to northeast 10 to 15 Sunday morning and to northeast 15 to 25 near noon Sunday. Wind becoming north 15 Sunday evening.

Rain ending early this morning. Snow Sunday becoming rain or snow. Visibility 1 mile or less in precipitation.

Temperatures plus 6 falling to minus 1 overnight.

Extended Forecast

Issued 06:00 AM EST 08 November 2025
Monday Wind light becoming west 15 knots in the afternoon.
Tuesday Wind west 15 knots.
Wednesday Wind west 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 EST 8 November 2025 Today Tonight and Sunday At 3:00 a.m. EST today low 993 mb located over Lake Saint-Jean.
By 7:00 a.m. EST Sunday departing low 1001 mb located east of
Newfoundland.

At 3:00 a.m. EST today ridge located north of Lake Superior.
By 7:00 p.m. EST Sunday ridge located from Lake Superior to
Labrador.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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