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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 15 March 2026

Today Tonight and Monday.

Gale warning in effect.

Wind east 15 knots increasing to east 25 early this morning then veering to southeast 20 this evening. Wind veering to south 20 Monday morning then increasing to southwest 30 Monday afternoon. Wind increasing to west 35 Monday evening.

Scattered flurries today. Showers Monday with a risk of thunderstorms. Visibility as low as 1 mile in flurries.

Waves

Issued 03:00 AM EDT 15 March 2026
Today Tonight and Monday. Waves 0.5 to 1 metre building to 1.5 this morning and to 2 to 3 this afternoon. Waves subsiding to 1 to 1.5 near midnight then 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 14 March 2026 Today Tonight and Sunday 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
Legend:
buoy Buoy
land station Land Station
Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 14 March 2026 Today Tonight and Sunday

Ice Coverage

Open water.

Warnings

Warnings (In effect)

Gale warning in effect

Western Lake Ontario

Issued 03:00 AM 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 3:00 AM EDT 15 March 2026 Today Tonight and Monday At 3:00 a.m. EDT today ridge located on a line north-south over
eastern Ontario.
By 3:00 a.m. EDT Monday ridge located on a line northwest-southeast
over eastern Quebec.

At 3:00 a.m. EDT today low 992 mb located over Nebraska.
By 3:00 a.m. EDT Monday low 988 mb located over southern Lake
Michigan.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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