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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:44 PM EDT 09 July 2025

Tonight and Thursday.

Wind light becoming west 10 knots Thursday afternoon.

Scattered showers ending Thursday morning with a risk of thunderstorms. Scattered showers Thursday late in the day with a risk of thunderstorms.

Waves

Issued 06:44 PM EDT 09 July 2025
Tonight and Thursday. Waves less than 0.5 metres building to 0.5 or less Thursday evening.

Extended Forecast

Issued 06:43 PM EDT 09 July 2025
Friday Wind light.
Saturday Wind light.
Sunday 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

Watches (Ended)

Squall watch ended

Western Lake Ontario

Issued 9:28 PM EDT 09 July 2025
Synopsis

Technical Marine Synopsis

Issued 6:50 PM EDT 9 July 2025 Tonight and Thursday At 6:30 p.m. EDT tonight trough located on a line east-west
over Ottawa.
By 6:30 p.m. EDT Thursday departing trough located on a line
east-west over Vermont.

At 6:30 p.m. EDT tonight dissipating ridge located from James Bay
to Wisconsin.

At 6:30 p.m. EDT tonight trough located on a line north-south over
eastern Saskatchewan.
By 6:30 p.m. EDT Thursday approaching trough located on a line
north-south over Lake Winnipeg.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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