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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 24 June 2025

Today Tonight and Wednesday.

Wind southwest 15 knots diminishing to southwest 10 this morning then increasing to northwest 15 early this evening. Wind diminishing to northwest 10 near midnight then backing to southwest 10 Wednesday morning. Wind becoming light Wednesday evening.

Scattered showers this afternoon and tonight with a risk of thunderstorms.

Waves

Issued 03:00 AM EDT 24 June 2025
Today Tonight and Wednesday. Waves 0.5 metres.

Extended Forecast

Issued 03:00 AM EDT 24 June 2025
Thursday Wind light becoming east 15 knots in the morning.
Friday Wind east 15 knots veering to south 15.
Saturday Wind southwest 15 knots diminishing to light late in the day.

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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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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 3:00 AM EDT 24 June 2025 Today Tonight and Wednesday At 3:00 a.m. EDT today quasi-stationary ridge from 1022 mb high
located from Tennessee to Lake Ontario.

At 3:00 a.m. EDT today cold front located over Lake Huron.
By 3:00 a.m. EDT Wednesday cold front located over Lake Erie.

At 3:00 a.m. EDT today high 1023 mb located over North Dakota.
By 3:00 a.m. EDT Wednesday high 1024 mb located over Lake Superior.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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