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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 10 April 2026

Today Tonight and Saturday.

Wind north 10 knots becoming light this afternoon then becoming west 10 this evening. Wind veering to northwest 10 early Saturday morning then increasing to west 15 Saturday afternoon.

Showers ending this evening. Fog patches dissipating near midnight.

Waves

Issued 10:30 AM EDT 10 April 2026
Today Tonight and Saturday. Waves 0.5 metres or less building to 0.5 to 1 near midnight.

Extended Forecast

Issued 03:00 AM EDT 10 April 2026
Sunday Wind light becoming southeast 15 knots in the afternoon.
Monday Wind southwest 25 knots diminishing to southwest 15 late in the day.
Tuesday Wind light.

Ice Forecast*

Issued 12:00 PM EDT 9 April 2026 Today Tonight and Friday Open water.

*Ice Forecast and Warnings also apply to U.S. waters

 

[ Canadian Ice Service ]

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

*Ice Forecast and Warnings also apply to U.S. waters

Ice Forecasts

Issued 12:00 PM EDT 9 April 2026 Today Tonight and Friday

Ice Coverage

Open water.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 10 April 2026 Today Tonight and Saturday At 10:30 a.m. EDT today trough located on a line northeast-southwest
over Lake Erie.
By 10:30 a.m. EDT Saturday low 1010 mb located over the Gulf of
St. Lawrence.

At 10:30 a.m. EDT today ridge located on a line northwest-southeast
over South Dakota.
By 10:30 a.m. EDT Saturday ridge located on a line north-south
over Lake Huron.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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