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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 10 August 2026

Tonight and Tuesday.

Wind west 15 knots diminishing to west 10 Tuesday evening.

Scattered showers this evening with a risk of thunderstorms.

Waves

Issued 06:30 PM EDT 10 August 2026
Tonight and Tuesday. Waves 0.5 to 1 metre subsiding to 0.5 or less Tuesday evening.

Extended Forecast

Issued 06:30 PM EDT 10 August 2026
Wednesday Wind light becoming southwest 15 knots late in the day.
Thursday Wind west 15 knots diminishing to light late in the day.
Friday Wind light.

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Map of Great Lakes - Lake Huron marine weather areas Erieau CFB Trenton Muskoka Airport Parry Sound Harbour Toronto City Centre Airport Lake Simcoe Regional Airport Wiarton Airport Point Petre Lagoon City Western Islands Cobourg Port Colborne Windsor Airport Point Pelee Welland-Pelham Vineland Station Burlington Lift Bridge Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Harrow AAFC Hamilton Munro Int'l Airport Tobermory Sarnia Chris Hadfield Airport Oshawa Executive Airport Collingwood 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 Peterborough Municipal Airport Brockville Grenadier Island Kingston Airport
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 10 August 2026 Tonight and Tuesday At 6:30 p.m. EDT tonight departing trough located on a line
northeast-southwest over southern Ontario.

At 6:30 p.m. EDT tonight ridge located on a line northwest-southeast
over southern Manitoba.
By 6:30 p.m. EDT Tuesday ridge located on a line northwest-southeast
over Lake Superior.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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