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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 17 October 2026

Tonight and Sunday.

Strong wind warning in effect.

Wind west 10 knots increasing to southwest 15 this evening and to southwest 15 to 20 near midnight. Wind becoming southwest 20 near noon Sunday.

Waves

Issued 06:30 PM EDT 17 October 2026
Tonight and Sunday. Waves 0.5 metres building to 1 this evening and to 1.5 Sunday afternoon.

Extended Forecast

Issued 06:30 PM EDT 17 October 2026
Monday Wind southwest 15 knots diminishing to light in the afternoon.
Tuesday Wind light becoming northeast 15 knots.
Wednesday Wind northeast 15 knots diminishing to 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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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 6:30 PM EDT 17 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 6:30 PM EDT 17 October 2026 Tonight and Sunday At 6:30 p.m. EDT tonight ridge located on a line northeast-southwest
over southern Ontario.
By 6:30 p.m. EDT Sunday ridge from 1036 mb high located on a line
northeast-southwest over the East Coast of the U.S.

At 6:30 p.m. EDT tonight low 992 mb located over Saskatchewan.
By 6:30 p.m. EDT Sunday approaching low 987 mb located over
southwestern Hudson Bay.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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