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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 15 March 2026

Today Tonight and Monday.

Gale warning in effect.

Wind east 25 knots veering to southeast 20 this evening then to south 20 Monday morning. Wind increasing to southwest 30 Monday afternoon and to west 35 Monday evening.

Periods of snow ending this afternoon with a risk of freezing rain. Showers Monday with a risk of thunderstorms. Visibility as low as 1 mile in snow.

Waves

Issued 10:30 AM EDT 15 March 2026
Today Tonight and Monday. Waves 1.5 metres building to 2 to 3 this afternoon then subsiding to 1 to 1.5 near midnight. Waves building to 2 Monday evening.

Extended Forecast

Issued 03:00 AM EDT 15 March 2026
Tuesday Wind southwest 35 knots diminishing to northwest 25 late in the day.
Wednesday Wind northwest 20 knots backing to southwest 15.
Thursday Wind southwest 15 knots diminishing to light.

Ice Forecast*

Issued 12:00 PM EDT 15 March 2026 Today Tonight and Monday Open water.

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

 

[ Canadian Ice Service ]

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

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

Ice Forecasts

Issued 12:00 PM EDT 15 March 2026 Today Tonight and Monday

Ice Coverage

Open water.

Warnings

Warnings (In effect)

Gale warning in effect

Western Lake Ontario

Issued 4:01 PM EDT 15 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 10:30 AM EDT 15 March 2026 Today Tonight and Monday At 10:30 a.m. EDT today departing ridge located on a line
north-south over eastern Ontario.

At 10:30 a.m. EDT today low 992 mb located over Iowa.
By 10:30 a.m. EDT Monday low 986 mb located over Lake Huron.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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