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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 15 March 2026

Tonight and Monday.

Gale warning in effect.

Wind east 30 knots diminishing to southeast 15 this evening then veering to south 20 Monday morning. Wind increasing to southwest 30 near noon Monday and to southwest 35 Monday evening.

Showers Monday morning and afternoon with a risk of thunderstorms becoming scattered flurries or scattered showers.

Waves

Issued 06:30 PM EDT 15 March 2026
Tonight and Monday. Waves 2 metres subsiding to 1 near midnight then building to 2 near noon Monday.

Extended Forecast

Issued 06:30 PM EDT 15 March 2026
Tuesday Wind southwest 35 knots diminishing to west 30 in the afternoon and to west 20 late in the day.
Wednesday Wind northwest 20 knots backing to southwest 15.
Thursday Wind southwest 20 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 6:30 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 6:30 PM EDT 15 March 2026 Tonight and Monday At 6:30 p.m. EDT tonight low 990 mb located over southern Lake
Michigan.
By 6:30 p.m. EDT Monday low 990 mb located over eastern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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