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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 14 July 2025

Today Tonight and Tuesday.

Wind south 10 knots becoming light early this morning then becoming southwest 10 near midnight. Wind becoming light Tuesday morning.

Scattered showers ending early this morning with a risk of thunderstorms.

Waves

Issued 03:00 AM EDT 14 July 2025
Today Tonight and Tuesday. Waves 0.5 metres or less.

Extended Forecast

Issued 03:00 AM EDT 14 July 2025
Wednesday Wind light.
Thursday Wind light becoming southwest 15 knots.
Friday Wind west 15 knots veering to north 15.

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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

*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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 14 July 2025 Today Tonight and Tuesday At 3:00 a.m. EDT today trough from 985 mb low located from Hudson
Bay to Lake of the Woods.
By 3:00 a.m. EDT Tuesday departing trough from 990 mb low located
on a line northeast-southwest over Quebec.

At 3:00 a.m. EDT today high 1018 mb located over Illinois.
By 3:00 a.m. EDT Tuesday high 1018 mb located over Pennsylvania.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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