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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 15 July 2025

Tonight and Wednesday.

Wind light becoming south 10 knots near noon Wednesday then increasing to south 15 Wednesday evening.

Scattered showers Wednesday evening with a risk of thunderstorms.

Waves

Issued 06:30 PM EDT 15 July 2025
Tonight and Wednesday. Waves 0.5 metres or less building to 0.5 to 1 Wednesday evening.

Extended Forecast

Issued 06:30 PM EDT 15 July 2025
Thursday Wind light increasing to southwest 20 knots in the morning then veering to northwest 20 late in the day.
Friday Wind north 15 knots diminishing to light.
Saturday Wind light.

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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 6:30 PM EDT 15 July 2025 Tonight and Wednesday At 6:30 p.m. EDT tonight departing ridge located on a line
northeast-southwest over the East Coast of the U.S.

At 6:30 p.m. EDT tonight low 1010 mb located over northeastern
Ontario.
By 6:30 p.m. EDT Wednesday low 1008 mb located over northern
New Brunswick.

At 6:30 p.m. EDT tonight low 1002 mb located over Nebraska.
By 6:30 p.m. EDT Wednesday low 1006 mb located over Wisconsin.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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