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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 28 April 2025

Tonight and Tuesday.

Gale warning in effect.

Wind southwest 15 knots diminishing to light this evening then increasing to southwest 10 to 20 Tuesday morning. Wind increasing to southwest 20 to 30 Tuesday afternoon then becoming southwest 25 to 35 Tuesday evening.

Scattered showers Tuesday afternoon and evening with a risk of thunderstorms. Visibility as low as 1 mile in showers.

Extended Forecast

Issued 06:00 AM EDT 28 April 2025
Wednesday Wind northwest 20 to 30 knots diminishing to light in the afternoon.
Thursday Wind light.
Friday Wind northeast 10 to 20 knots.

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

There is no ice forecast issued for this area.

Warnings

Warnings (In effect)

Gale warning in effect

Cornwall to Montréal

Issued 3:00 PM EDT 28 April 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 PM EDT 28 April 2025 Tonight and Tuesday At 3:00 p.m. EDT today ridge located from the East Coast of the
U.S. to Ungava Bay.
By 5:00 p.m. EDT Tuesday departing ridge located from Cape Hatteras
to Newfoundland.

At 8:00 p.m. EDT tonight intensifying trough located on a line
northeast-southwest over northwestern Ontario.
By 8:00 p.m. EDT Tuesday trough located on a line
northeast-southwest over Lake Saint-Jean.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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