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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 16 August 2026

Today Tonight and Monday.

Wind east 15 knots diminishing to east 10 this afternoon then becoming light this evening. Wind becoming northwest 10 early Monday morning then backing to west 10 near noon Monday. Wind veering to northwest 10 Monday evening.

Scattered showers this afternoon and this evening with a risk of thunderstorms. Scattered showers Monday.

Waves

Issued 10:30 AM EDT 16 August 2026
Today Tonight and Monday. Waves 0.5 to 1 metre subsiding to 0.5 or less early this evening.

Extended Forecast

Issued 03:00 AM EDT 16 August 2026
Tuesday Wind light becoming southwest 15 knots late in the day.
Wednesday Wind southwest 15 knots diminishing to light late in the day.
Thursday Wind light.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Hamilton Munro Int'l Airport CFB Trenton Erieau Toronto City Centre Airport Point Pelee Peterborough Municipal Airport Burlington Lift Bridge Point Petre Cobourg Oshawa Executive Airport South Lake Huron - 45149 Port Colborne Brockville 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 Windsor Airport Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Welland-Pelham Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Sarnia Chris Hadfield Airport Vineland Station Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Tobermory
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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 17 May 2026 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 16 August 2026 Today Tonight and Monday At 10:30 a.m. EDT today trough located on a line north-south over
Lower Michigan.
By 10:30 a.m. EDT Monday trough located on a line north-south over
eastern New York State.

At 10:30 a.m. EDT today ridge located on a line north-south over
western South Dakota.
By 10:30 a.m. EDT Monday ridge located from James Bay to Lake
Superior then to Kansas.

By 10:30 a.m. EDT Monday approaching trough located on a line
northeast-southwest over southern Manitoba.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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