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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 31 March 2025

Today Tonight and Tuesday.

Gale warning in effect.

Wind northeast 10 to 15 knots becoming southerly 15 early this morning then increasing to southwest 25 to 35 late this afternoon. Wind diminishing to northwesterly 15 to 25 early this evening then becoming northwest 15 Tuesday evening.

Showers ending this evening. Visibility as low as 1 mile in showers.

High today plus 14. Low tonight minus 2. High Tuesday plus 3.

Extended Forecast

Issued 06:00 AM EDT 31 March 2025
Wednesday Wind northwest 10 to 15 knots diminishing to light in the morning.
Thursday Wind east 10 to 20 knots becoming southwest 10 to 20.
Friday Wind west 15 knots diminishing to light.

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

Gale warning in effect

Cornwall to Montréal

Issued 06:08 AM EDT 31 March 2025

'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 31 March 2025 Today Tonight and Tuesday At 3:00 a.m. EDT today departing ridge located from Labrador
to Newfoundland.

At 3:00 a.m. EDT today low 995 mb located northeast of Lake Huron.
By 8:00 p.m. EDT Tuesday low 982 mb located over the Strait of
Belle Isle.

At 8:00 a.m. EDT Tuesday ridge located on a line north-south over
James Bay.
By 7:30 p.m. EDT Tuesday ridge located on a line north-south over
the Great Lakes.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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