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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 12 June 2026

Tonight and Saturday.

Wind west 15 knots backing to southwest 15 Saturday morning.

Waves

Issued 06:30 PM EDT 12 June 2026
Tonight and Saturday. Waves 0.5 to 1 metre.

Extended Forecast

Issued 06:30 PM EDT 12 June 2026
Sunday Wind light becoming northwest 15 knots late in the day.
Monday Wind west 20 knots diminishing to light late in the day.
Tuesday Wind light.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas CFB Trenton Port Colborne - 45142 Hamilton Munro Int'l Airport Oshawa Executive Airport Port Stanley - 45132 Lake Nipissing - 45152 Point Petre Georgian Bay - 45137 Toronto City Centre Airport Lake Simcoe - 45151 South Georgian Bay - 45143 Prince Edward Point - 45135 Peterborough Municipal Airport South Lake Huron - 45149 Collingwood Lake St Clair - 45147 Grimsby - 45139 Goderich Lagoon City Kingston Airport Muskoka Airport Parry Sound Harbour Grenadier Island Lake Simcoe Regional Airport Wiarton Airport Brockville Western Islands Cove Island Great Duck Island North Channel - 45154 Sarnia Chris Hadfield Airport Gore Bay-Manitoulin Airport Tobermory Harrow AAFC Long Point North Bay Airport Port Weller St. Catharines / Niagara District Airport Greater Sudbury Airport Southeast Shoal Vineland Station Port Colborne Erieau Cobourg Sault Ste. Marie Airport Windsor Airport Welland-Pelham Killarney Ajax - 45159 Point Pelee Burlington Lift Bridge
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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 6:30 PM EDT 12 June 2026 Tonight and Saturday At 6:30 p.m. EDT tonight low 988 mb located over northeastern
Manitoba.
By 6:30 p.m. EDT Saturday low 999 mb located over Hudson Bay.

At 6:30 p.m. EDT tonight quasi-stationary trough located on a line
northwest-southeast over James Bay.

At 6:30 p.m. EDT tonight ridge located on a line northeast-southwest
over Ohio.
By 6:30 p.m. EDT Saturday ridge located on a line
northeast-southwest over West Virginia.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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