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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 01 July 2025

Tonight and Wednesday.

Wind southwest 10 knots veering to west 10 near midnight then backing to southwest 10 Wednesday morning.

Scattered showers this evening with a risk of thunderstorms. Scattered showers Wednesday late in the day with a risk of thunderstorms.

Waves

Issued 06:30 PM EDT 01 July 2025
Tonight and Wednesday. Waves 0.5 to 1 metre subsiding to 0.5 or less this evening.

Extended Forecast

Issued 06:30 PM EDT 01 July 2025
Thursday Wind light becoming west 15 knots in the morning.
Friday Wind light.
Saturday 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 6:30 PM EDT 1 July 2025 Tonight and Wednesday At 6:30 p.m. EDT tonight departing cold front located on a line
northeast-southwest over Lake Ontario.

At 6:30 p.m. EDT tonight ridge located on a line northwest-southeast
over Minnesota.
By 6:30 p.m. EDT Wednesday ridge located on a line
northwest-southeast over Lake of the Woods.

At 6:30 p.m. EDT tonight trough located on a line north-south over
James Bay.
By 6:30 p.m. EDT Wednesday trough located on a line
northeast-southwest over Quebec.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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