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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 31 May 2025

Tonight and Sunday.

Strong wind warning in effect.

Wind northwest 20 knots diminishing to northwest 10 this evening then increasing to west 15 early Sunday morning. Wind diminishing to west 10 Sunday evening.

Waves

Issued 06:30 PM EDT 31 May 2025
Tonight and Sunday. Waves 0.5 to 1 metre subsiding to 0.5 or less near midnight then building to 0.5 to 1 Sunday morning. Waves subsiding to 0.5 or less Sunday evening.

Extended Forecast

Issued 06:30 PM EDT 31 May 2025
Monday Wind light becoming southwest 15 knots in the morning.
Tuesday Wind light becoming southwest 15 knots.
Wednesday Wind southwest 15 knots.

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Map of Great Lakes - Lake Huron marine weather areas Cove Island Goderich Oshawa Executive Airport CFB Trenton Western Islands Wiarton Airport Point Petre Lake Simcoe Regional Airport Parry Sound Harbour Toronto City Centre Airport Muskoka Airport Lagoon City Brockville Hamilton Munro Int'l Airport Sarnia Chris Hadfield Airport Tobermory Cobourg Harrow AAFC Long Point Port Weller Burlington Lift Bridge St. Catharines / Niagara District Airport Southeast Shoal Point Pelee Vineland Station Welland-Pelham Erieau Windsor Airport Port Colborne Killarney South Georgian Bay - 45143 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Lake St Clair - 45147 South Lake Huron - 45149 Sault Ste. Marie Airport Lake Simcoe - 45151 Collingwood Greater Sudbury Airport North Bay Airport Kingston Airport Peterborough Municipal Airport Grenadier Island Port Colborne - 45142 Great Duck Island Ajax - 45159 Gore Bay-Manitoulin Airport North Channel - 45154 Lake Nipissing - 45152
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Western Lake Ontario

Issued 6:30 PM EDT 31 May 2025

'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 31 May 2025 Tonight and Sunday At 6:30 p.m. EDT tonight low 983 mb located over New England.
By 6:30 p.m. EDT Sunday low 990 mb located over central Quebec.

At 6:30 p.m. EDT tonight ridge located on a line north-south over
northwestern Ontario.
By 6:30 p.m. EDT Sunday ridge located on a line north-south over
Lake Superior.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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