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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 23 May 2026

Today Tonight and Sunday.

Strong wind warning in effect.

Wind east 15 to 20 knots increasing to east 25 near noon then veering to southeast 25 early this evening. Wind diminishing to southeast 15 Sunday morning and to east 10 near noon Sunday. Wind becoming light Sunday evening.

Rain beginning early this morning changing to scattered showers this evening and ending near noon Sunday. Scattered showers Sunday evening. Fog patches forming near midnight.

Waves

Issued 03:00 AM EDT 23 May 2026
Today Tonight and Sunday. Waves 0.5 to 1 metre building to 2 this afternoon then subsiding to 1.5 overnight. Waves subsiding to 0.5 to 1 Sunday morning and to 0.5 or less Sunday afternoon.

Extended Forecast

Issued 03:00 AM EDT 23 May 2026
Monday Wind light.
Tuesday Wind light becoming southwest 15 knots.
Wednesday Wind southwest 15 knots.

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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 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Western Lake Ontario

Issued 03:00 AM EDT 23 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 3:00 AM EDT 23 May 2026 Today Tonight and Sunday At 3:00 a.m. EDT today ridge located on a line north-south over
western Quebec.
By 3:00 a.m. EDT Sunday ridge located on a line northwest-southeast
over Maine.

At 3:00 a.m. EDT today low 1011 mb located over southern Indiana.
By 3:00 a.m. EDT Sunday low 1014 mb located over Lake Huron.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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