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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 10 October 2026

Today Tonight and Sunday.

Strong wind warning in effect.

Wind northeast 10 knots increasing to east 15 early this morning and to east 20 this afternoon. Wind diminishing to southeast 15 this evening then backing to east 15 Sunday afternoon.

Periods of rain Sunday afternoon and evening.

Waves

Issued 03:00 AM EDT 10 October 2026
Today Tonight and Sunday. Waves 0.5 metres or less building to 1 to 1.5 this afternoon then subsiding to 0.5 near midnight.

Extended Forecast

Issued 03:00 AM EDT 10 October 2026
Monday Wind light becoming southwest 15 knots late in the day.
Tuesday Wind southwest 15 knots becoming northeast 15.
Wednesday Wind northeast 15 knots diminishing to light.

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Map of Great Lakes - Lake Huron marine weather areas Erieau CFB Trenton Muskoka Airport Parry Sound Harbour Toronto City Centre Airport Lake Simcoe Regional Airport Wiarton Airport Point Petre Lagoon City Western Islands Cobourg Port Colborne Windsor Airport Point Pelee Welland-Pelham Vineland Station Burlington Lift Bridge Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Harrow AAFC Hamilton Munro Int'l Airport Tobermory Sarnia Chris Hadfield Airport Oshawa Executive Airport Collingwood Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Peterborough Municipal Airport Brockville Grenadier Island Kingston Airport
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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

Warnings (In effect)

Strong wind warning in effect

Western Lake Ontario

Issued 03:00 AM EDT 10 October 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 10 October 2026 Today Tonight and Sunday At 3:00 a.m. EDT today ridge from 1028 mb high located on a line
northwest-southeast over central Ontario.
By 3:00 a.m. EDT Sunday departing ridge from 1034 mb high located
on a line north-south over Maine.

By 3:00 a.m. EDT Sunday approaching trough located on a line
northeast-southwest over northwestern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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