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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 24 June 2025

Today Tonight and Wednesday.

Wind west 15 knots increasing to west 15 to 20 near midnight then diminishing to west 10 Wednesday morning.

Scattered showers this afternoon and tonight with a risk of thunderstorms. Fog patches dissipating near noon.

Waves

Issued 03:00 AM EDT 24 June 2025
Today Tonight and Wednesday. Waves 0.5 to 1 metre subsiding to 0.5 or less Wednesday morning.

Extended Forecast

Issued 03:00 AM EDT 24 June 2025
Thursday Wind light becoming east 15 knots in the morning.
Friday Wind east 15 knots veering to south 15.
Saturday Wind southwest 15 knots diminishing to light late in the day.

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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 24 June 2025 Today Tonight and Wednesday At 3:00 a.m. EDT today quasi-stationary ridge from 1022 mb high
located from Tennessee to Lake Ontario.

At 3:00 a.m. EDT today cold front located over Lake Huron.
By 3:00 a.m. EDT Wednesday cold front located over Lake Erie.

At 3:00 a.m. EDT today high 1023 mb located over North Dakota.
By 3:00 a.m. EDT Wednesday high 1024 mb located over Lake Superior.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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