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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 18 April 2026

Today Tonight and Sunday.

Wind east 15 knots veering to southeast 15 this morning then to southwest 20 this afternoon. Wind veering to northwest 15 this evening then backing to west 15 Sunday morning. Wind veering to northwest 15 Sunday evening.

Showers this afternoon and tonight. Risk of thunderstorms this afternoon and this evening. Scattered showers or scattered flurries Sunday afternoon and evening. Fog patches dissipating this evening.

Waves

Issued 03:00 AM EDT 18 April 2026
Today Tonight and Sunday. Waves 0.5 to 1 metre building to 1 to 1.5 early this evening then subsiding to 0.5 to 1 near midnight.

Extended Forecast

Issued 03:00 AM EDT 18 April 2026
Monday Wind northwest 20 knots.
Tuesday Wind light becoming south 15 knots.
Wednesday Wind southwest 15 knots diminishing to light.

Ice Forecast*

Issued 12:00 PM EDT 17 April 2026 Today Tonight and Saturday 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
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land station Land Station
Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 17 April 2026 Today Tonight and Saturday

Ice Coverage

Ice free.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 18 April 2026 Today Tonight and Sunday At 3:00 a.m. EDT today low 994 mb located over northeastern Ontario.
By 3:00 a.m. EDT Sunday low 981 mb located over eastern Hudson Bay.

At 3:00 a.m. EDT today cold front located on a line north-south
over eastern Lake Superior.
By 3:00 a.m. EDT Sunday cold front from low located on a line
northeast-southwest over the St. Lawrence River.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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