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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EST 11 November 2025

Tonight and Wednesday.

Strong wind warning in effect.

Wind southwest 25 knots veering to west 30 near noon Wednesday.

Scattered showers overnight and Wednesday.

Waves

Issued 06:30 PM EST 11 November 2025
Tonight and Wednesday. Waves 1 to 1.5 metres building to 2 this evening and to 2 to 3 Wednesday afternoon.

Extended Forecast

Issued 06:30 PM EST 11 November 2025
Thursday Wind west 20 knots.
Friday Wind west 15 knots diminishing to light late in the day.
Saturday Wind light becoming southeast 15 knots.

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

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

Ice Forecasts

Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 6:30 PM EST 11 November 2025

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. 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 6:30 PM EST 11 November 2025 Tonight and Wednesday At 6:30 p.m. EST tonight ridge located on a line north-south over
northeastern Ontario.
By 6:30 p.m. EST Wednesday dissipating ridge located over Quebec.

At 6:30 p.m. EST tonight trough located on a line
northwest-southeast over northwestern Ontario.
By 6:30 p.m. EST Wednesday low 999 mb located over eastern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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