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Eastern 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 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 Erie and Lake Ontario marine weather areas Harrow AAFC Burlington Lift Bridge Oshawa Executive Airport Point Pelee Peterborough Municipal Airport Point Petre Hamilton Munro Int'l Airport Erieau Cobourg Toronto City Centre Airport Port Colborne CFB Trenton South Lake Huron - 45149 Windsor Airport Great Duck Island Gore Bay-Manitoulin Airport North Bay Airport Greater Sudbury Airport Killarney Sault Ste. Marie Airport Ajax - 45159 North Channel - 45154 Lake Nipissing - 45152 Lake Simcoe - 45151 Welland-Pelham Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Vineland Station Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Cove Island Goderich Sarnia Chris Hadfield Airport Western Islands Tobermory Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal
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land station Land Station
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 6:50 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 Erie and Lake Ontario Area

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Marine Weather for Canada

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