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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 15 April 2026

Tonight and Thursday.

Wind light tonight and Thursday.

Periods of drizzle changing to showers Thursday morning. Fog banks forming late this evening and dissipating Thursday morning.

Extended Forecast

Issued 06:00 PM EDT 15 April 2026
Friday Wind light.
Saturday Wind northeast 10 to 15 knots increasing to southeast 15 to 25.
Sunday Wind south 15 to 25 knots becoming west 15.

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Map of Great Lakes - Lake Huron marine weather areas Wiarton Airport Western Islands Cove Island Goderich Lake Simcoe Regional Airport Vineland Station Parry Sound Harbour Sarnia Chris Hadfield Airport Tobermory Muskoka Airport Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Lagoon City Southeast Shoal Burlington Lift Bridge Welland-Pelham Windsor Airport Port Colborne Erieau Peterborough Municipal Airport CFB Trenton Toronto City Centre Airport Point Petre Oshawa Executive Airport Hamilton Munro Int'l Airport Point Pelee Cobourg Port Colborne - 45142 North Channel - 45154 Ajax - 45159 Lake Nipissing - 45152 Sault Ste. Marie Airport Killarney Lake Simcoe - 45151 Greater Sudbury Airport South Lake Huron - 45149 Lake St Clair - 45147 North Bay Airport South Georgian Bay - 45143 Gore Bay-Manitoulin Airport Grimsby - 45139 Georgian Bay - 45137 Great Duck Island Collingwood Kingston Airport Grenadier Island Brockville Prince Edward Point - 45135 Port Stanley - 45132
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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 15 April 2026 Tonight and Thursday At 3:00 p.m. EDT today departing high 1023 mb located over
Newfoundland.

At 3:00 p.m. EDT today ridge located on a line east-west over the
Gulf of St. Lawrence.
By 8:00 p.m. EDT Thursday departing ridge located on a line
east-west over Newfoundland.

At 8:00 p.m. EDT tonight building low 1004 mb located over the
Midwestern states.
By 8:00 p.m. EDT Thursday low 1004 mb located over eastern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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