Language selection

Weather shortcuts

Cornwall to Montréal

Forecast

Marine Forecast

Issued 03:00 AM EST 30 December 2024

Today Tonight and Tuesday.

Wind southeast 15 knots veering to southwest 15 near noon then increasing to southwest 15 to 25 early this evening. Wind becoming southwest 15 Tuesday morning then diminishing to light Tuesday afternoon.

Periods of rain ending overnight. Visibility as low as 1 mile in rain.

Temperatures plus 7 falling to minus 1 Tuesday evening.

Extended Forecast

Issued 06:00 AM EST 30 December 2024
Wednesday Wind northeast 15 knots diminishing to light in the afternoon.
Thursday Wind west 15 to 25 knots.
Friday Wind west 15 to 25 knots becoming west 15 late in the day.

Stay connected

ATOM

Weather Conditions

Skip Image

Zoom-in to make a selection

Map of Great Lakes - Lake Erie and Lake Ontario 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
Legend:
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 AM EST 30 December 2024 Today Tonight and Tuesday At 3:00 a.m. EST today trough located on a line northwest-southeast
over Lake Ontario.
By 7:00 p.m. EST Tuesday trough located on a line
northwest-southeast over Sept-Îles.

At 3:00 a.m. EST today departing ridge located from Labrador Sea
to Newfoundland.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Features

Canada's 10 most impactful weather stories of 2024

Find out which weather events made the list

Date modified: