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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 15 May 2026

Tonight and Saturday.

Strong wind warning in effect.

Wind southwest 15 knots diminishing to southwest 10 near midnight then increasing to southwest 20 near noon Saturday. Wind diminishing to southwest 15 Saturday evening.

Scattered showers Saturday afternoon and evening with a risk of thunderstorms.

Waves

Issued 06:30 PM EDT 15 May 2026
Tonight and Saturday. 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 1 to 1.5 Saturday afternoon.

Extended Forecast

Issued 06:30 PM EDT 15 May 2026
Sunday Wind west 15 knots diminishing to light in the morning.
Monday Wind light becoming southwest 15 knots late in the day.
Tuesday Wind southwest 15 knots.

Ice Forecast*

Issued 12:00 PM EDT 15 May 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 15 May 2026 Today Tonight and Saturday

Ice Coverage

Ice free.

Warnings

Warnings (In effect)

Strong wind warning in effect

Western Lake Ontario

Issued 6:30 PM EDT 15 May 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. 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 May 2026 Tonight and Saturday At 6:30 p.m. EDT tonight departing ridge located on a line
northeast-southwest over the St. Lawrence River.

At 6:30 p.m. EDT tonight low 988 mb located over northern Ontario.
By 6:30 p.m. EDT Saturday low 988 mb located over northern Quebec.

By 6:30 p.m. EDT Saturday ridge located from Manitoba to Michigan.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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