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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 29 April 2025

Today Tonight and Wednesday.

Wind south 20 knots veering to southwest 25 near noon then to west 25 early this evening. Wind veering to northwest 20 near midnight then diminishing to northwest 10 Wednesday morning. Wind becoming light near noon Wednesday.

Scattered showers today and this evening with a risk of thunderstorms.

Waves

Issued 03:00 AM EDT 29 April 2025
Today Tonight and Wednesday. Waves 1 metre building to 2 this afternoon then subsiding to 1 overnight. Waves subsiding to 0.5 or less Wednesday morning.

Extended Forecast

Issued 03:00 AM EDT 29 April 2025
Thursday Wind light increasing to east 20 knots in the afternoon.
Friday Wind southwest 25 knots diminishing to west 15 late in the day.
Saturday Wind light.

Ice Forecast*

Issued 12:00 PM EDT 28 April 2025 Today Tonight and Tuesday Ice free.

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

 

[ Canadian Ice Service ]

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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 28 April 2025 Today Tonight and Tuesday

Ice Coverage

Ice free.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 29 April 2025 Today Tonight and Wednesday At 3:00 a.m. EDT today low 997 mb located over eastern Lake
Superior.
By 3:00 a.m. EDT Wednesday departing low 991 mb located over
eastern Quebec.

At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over Manitoba.
By 3:00 a.m. EDT Wednesday ridge located on a line
northeast-southwest over Whitefish Bay.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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