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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:10 AM EDT 13 August 2026

Today Tonight and Friday.

Wind light becoming west 10 knots near noon then veering to north 10 this evening. Wind veering to northeast 10 near midnight then increasing to northeast 15 Friday morning. Wind diminishing to east 10 Friday afternoon then backing to northeast 10 Friday evening.

Waves

Issued 03:00 AM EDT 13 August 2026
Today Tonight and Friday. Waves 0.5 metres or less building to 0.5 to 1 Friday morning then subsiding to 0.5 or less Friday evening.

Extended Forecast

Issued 06:11 AM EDT 13 August 2026
Saturday Wind light becoming northeast 15 knots in the morning then diminishing to light in the afternoon.
Sunday Wind light becoming south 15 knots.
Monday Wind northwest 15 knots.

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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 3:00 AM EDT 13 August 2026 Today Tonight and Friday At 3:00 a.m. EDT today quasi-stationary trough located over Iowa
to Michigan.

At 3:00 a.m. EDT today quasi-stationary ridge located on a line
northwest-southeast over northwestern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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