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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:45 PM EDT 19 May 2026

Tonight and Wednesday.

Strong wind warning in effect.

Wind southwest 20 knots diminishing to west 15 late overnight except light near the west end Wednesday afternoon. Wind becoming northwest 15 early Wednesday evening.

Scattered showers ending overnight.

Waves

Issued 06:30 PM EDT 19 May 2026
Tonight and Wednesday. Waves 1 metre subsiding to 0.5 early Wednesday morning then building to 0.5 to 1 Wednesday evening.

Extended Forecast

Issued 06:30 PM EDT 19 May 2026
Thursday Wind northeast 15 knots diminishing to light late in the day.
Friday Wind light becoming east 15 knots.
Saturday Wind east 20 knots.

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Map of Great Lakes - Lake Huron marine weather areas Wiarton Airport Western Islands Cove Island Goderich Lake Simcoe Regional Airport Vineland Station Parry Sound Harbour Sarnia Chris Hadfield Airport Tobermory Muskoka Airport Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Lagoon City Southeast Shoal Burlington Lift Bridge Welland-Pelham Windsor Airport Port Colborne Erieau Peterborough Municipal Airport CFB Trenton Toronto City Centre Airport Point Petre Oshawa Executive Airport Hamilton Munro Int'l Airport Point Pelee Cobourg Port Colborne - 45142 North Channel - 45154 Ajax - 45159 Lake Nipissing - 45152 Sault Ste. Marie Airport Killarney Lake Simcoe - 45151 Greater Sudbury Airport South Lake Huron - 45149 Lake St Clair - 45147 North Bay Airport South Georgian Bay - 45143 Gore Bay-Manitoulin Airport Grimsby - 45139 Georgian Bay - 45137 Great Duck Island Collingwood Kingston Airport Grenadier Island Brockville Prince Edward Point - 45135 Port Stanley - 45132
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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 10:45 PM EDT 19 May 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 or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 20 May 2026 Today Tonight and Thursday At 3:00 a.m. EDT today departing low 998 mb located over central
Quebec.

At 3:00 a.m. EDT today ridge located on a line north-south over
the Ontario - Manitoba border.
By 3:00 a.m. EDT Thursday high 1030 mb located over Lake Superior.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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