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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 11 March 2026

Tonight and Thursday.

Gale warning in effect.

Wind southwest 25 knots increasing to west 35 near midnight then diminishing to west 25 early Thursday morning. Wind veering to northwest 20 Thursday evening.

Scattered showers changing to scattered flurries overnight.

Waves

Issued 06:30 PM EDT 11 March 2026
Tonight and Thursday. Waves 0.5 to 1 metre building to 1.5 this evening and to 2 near midnight. Waves subsiding to 1 to 1.5 near noon Thursday and to 0.5 to 1 Thursday evening.

Extended Forecast

Issued 06:30 PM EDT 11 March 2026
Friday Wind northwest 15 knots diminishing to light in the morning then increasing to southeast 20 in the afternoon.
Saturday Wind southwest 35 knots diminishing to light late in the day.
Sunday Wind light increasing to east 30 knots.

Ice Forecast*

Issued 12:00 PM EDT 11 March 2026 Today Tonight and Thursday Open water.

*Ice Forecast and Warnings also apply to U.S. waters

 

[ Canadian Ice Service ]

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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 11 March 2026 Today Tonight and Thursday

Ice Coverage

Open water.

Warnings

Warnings (In effect)

Gale warning in effect

Western Lake Ontario

Issued 6:30 PM EDT 11 March 2026

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. 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 6:30 PM EDT 11 March 2026 Tonight and Thursday At 6:30 p.m. EDT tonight low 995 mb located over eastern Ontario.
By 6:30 p.m. EDT Thursday departing low 991 mb located over the
Gulf of St. Lawrence.

By 6:30 p.m. EDT Thursday ridge located on a line north-south over
northeastern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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