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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 09 May 2026

Today Tonight and Sunday.

Wind southeast 10 knots increasing to southwest 15 early this evening then diminishing to west 10 near midnight. Wind increasing to southwest 15 near noon Sunday then diminishing to northwest 10 Sunday evening.

Scattered showers this evening. Fog patches forming this evening and dissipating Sunday morning.

Waves

Issued 10:30 AM EDT 09 May 2026
Today Tonight and Sunday. Waves 0.5 metres or less building to 0.5 to 1 this evening then subsiding to 0.5 or less late overnight. Waves building to 0.5 to 1 Sunday afternoon then subsiding to 0.5 or less Sunday evening.

Extended Forecast

Issued 03:00 AM EDT 09 May 2026
Monday Wind light becoming west 15 knots in the afternoon.
Tuesday Wind light.
Wednesday Wind southeast 15 knots backing to east 20.

Ice Forecast*

Issued 12:00 PM EDT 9 May 2026 Today Tonight and Sunday Ice free.

*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 9 May 2026 Today Tonight and Sunday

Ice Coverage

Ice free.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 9 May 2026 Today Tonight and Sunday At 10:30 a.m. EDT today trough from 997 mb low located on a line
north-south over northeastern Ontario.
By 10:30 a.m. EDT Sunday low 995 mb located over central Quebec.

At 10:30 a.m. EDT today ridge located on a line northwest-southeast
over Saskatchewan.
By 10:30 a.m. EDT Sunday ridge located on a line north-south
over Manitoba.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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