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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 30 April 2025

Today Tonight and Thursday.

Gale warning in effect.

Wind west 25 to 35 knots diminishing to northwest 15 early this morning and to light this evening. Wind becoming northeast 15 Thursday afternoon.

Extended Forecast

Issued 06:00 PM EDT 29 April 2025
Thursday Wind light.
Friday Wind easterly 10 to 20 knots becoming southwest 15 to 25 late in the day.
Saturday Wind southwest 15 knots diminishing to light.

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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 03:00 AM EDT 30 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 AM EDT 30 April 2025 Today Tonight and Thursday At 3:00 a.m. EDT today low 992 mb located over northern Saguenay
River.
By 8:00 p.m. EDT Thursday departing low 995 mb located off
Newfoundland.

At 3:00 a.m. EDT today high 1024 mb located over Lake Superior.
By 8:00 p.m. EDT tonight high 1021 mb located over northern
Sept-Îles.

At 11:00 a.m. EDT Thursday approaching low 1006 mb located near
Lake Michigan.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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