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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 16 May 2026

Today Tonight and Sunday.

Strong wind warning in effect.

Wind southwest 10 knots increasing to southwest 20 near noon then diminishing to southwest 15 this evening. Wind diminishing to southwest 10 late overnight then becoming light early Sunday morning. Wind becoming east 10 Sunday evening.

Scattered showers this afternoon and this evening with a risk of thunderstorms. Fog patches forming near midnight and dissipating near noon Sunday.

Waves

Issued 10:30 AM EDT 16 May 2026
Today Tonight and Sunday. Waves 0.5 metres or less building to 1 to 1.5 this afternoon then subsiding to 0.5 to 1 near midnight. Waves subsiding to 0.5 or less Sunday morning.

Extended Forecast

Issued 03:00 AM EDT 16 May 2026
Monday Wind light becoming southwest 15 knots late in the day.
Tuesday Wind southwest 15 knots.
Wednesday Wind southwest 15 knots.

Ice Forecast*

Issued 12:00 PM EDT 16 May 2026 Today Tonight and Sunday Ice free.These are the last forecasts for the season.

*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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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 16 May 2026 Today Tonight and Sunday

Ice Coverage

Ice free.

These are the last forecasts for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Western Lake Ontario

Issued 10:30 AM EDT 16 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 10:30 AM EDT 16 May 2026 Today Tonight and Sunday At 10:30 a.m. EDT today low 986 mb located over eastern Hudson Bay.
By 10:30 a.m. EDT Sunday departing low 988 mb located over northern
Quebec.

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

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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