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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 16 March 2026

Today Tonight and Tuesday.

Gale warning in effect.

Wind southeast 25 to 35 knots becoming southwest 20 to 30 early this evening then increasing to southwest 30 to 40 after midnight. Wind diminishing to west 15 to 25 Tuesday evening.

Showers this morning and tonight changing to flurries Tuesday morning. Visibility 1 mile or less in precipitation.

Temperatures plus 1 rising to plus 13 this evening then falling to minus 11 Tuesday evening.

Extended Forecast

Issued 06:00 AM EDT 16 March 2026
Wednesday Wind west 15 to 25 knots diminishing to westerly 10 to 15 in the morning.
Thursday Wind light.
Friday Wind light.

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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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land station Land Station
Ice Conditions

There is no ice forecast issued for this area.

Warnings

Warnings (In effect)

Gale warning in effect

Cornwall to Montréal

Issued 08:28 AM EDT 16 March 2026

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. 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 16 March 2026 Today Tonight and Tuesday At 3:00 a.m. EDT today ridge located on a line northwest-southeast
over the Gulf of St. Lawrence.
By midnight EDT tonight departing ridge located on a line
northwest-southeast over Labrador Sea.

At 3:00 a.m. EDT today low 988 mb located east of Lake Michigan.
By 8:00 p.m. EDT Tuesday low 956 mb located over southern Ungava
Bay.

At 8:00 p.m. EDT Tuesday approaching ridge located on a line
north-south over Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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