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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 13 May 2026

Today Tonight and Thursday.

Wind light becoming southeast 15 knots this morning then diminishing to light near midnight. Wind becoming southeast 10 to 15 Thursday morning then backing to northeast 10 to 15 Thursday afternoon.

Rain beginning late this morning.

Extended Forecast

Issued 06:00 AM EDT 13 May 2026
Friday Wind northeast 15 knots diminishing to light in the afternoon.
Saturday Wind light increasing to southwest 15 to 25 knots.
Sunday Wind westerly 15 to 25 knots.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas CFB Trenton Port Colborne - 45142 Hamilton Munro Int'l Airport Oshawa Executive Airport Port Stanley - 45132 Lake Nipissing - 45152 Point Petre Georgian Bay - 45137 Toronto City Centre Airport Lake Simcoe - 45151 South Georgian Bay - 45143 Prince Edward Point - 45135 Peterborough Municipal Airport South Lake Huron - 45149 Collingwood Lake St Clair - 45147 Grimsby - 45139 Goderich Lagoon City Kingston Airport Muskoka Airport Parry Sound Harbour Grenadier Island Lake Simcoe Regional Airport Wiarton Airport Brockville Western Islands Cove Island Great Duck Island North Channel - 45154 Sarnia Chris Hadfield Airport Gore Bay-Manitoulin Airport Tobermory Harrow AAFC Long Point North Bay Airport Port Weller St. Catharines / Niagara District Airport Greater Sudbury Airport Southeast Shoal Vineland Station Port Colborne Erieau Cobourg Sault Ste. Marie Airport Windsor Airport Welland-Pelham Killarney Ajax - 45159 Point Pelee Burlington Lift Bridge
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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 13 May 2026 Today Tonight and Thursday At 3:00 a.m. EDT today ridge located on a line north-south over
Saguenay River.
By 8:00 p.m. EDT tonight ridge located on a line northwest-southeast
over the Gulf of St. Lawrence.

At 3:00 a.m. EDT today low 1001 mb located over Lake Huron.
By 8:00 p.m. EDT Thursday low 1005 mb located near Cape Cod.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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