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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 17 June 2026

Tonight and Thursday.

Strong wind warning in effect.

Wind southwest 15 knots backing to southeast 15 this evening then increasing to south 25 late overnight. Wind veering to southwest 25 early Thursday morning then increasing to southwest 30 late Thursday morning. Wind veering to west 25 Thursday evening.

Rain changing to scattered showers Thursday morning. Risk of thunderstorms tonight and Thursday.

Waves

Issued 06:30 PM EDT 17 June 2026
Tonight and Thursday. Waves 0.5 metres or less building to 0.5 to 1 this evening and to 1 to 1.5 late overnight. Waves building to 2 Thursday morning.

Extended Forecast

Issued 06:30 PM EDT 17 June 2026
Friday Wind west 20 to 25 knots.
Saturday Wind west 20 knots.
Sunday Wind west 15 knots diminishing to light late in the day.

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Map of Great Lakes - Lake Huron marine weather areas Wiarton Airport Western Islands Cove Island Goderich Lake Simcoe Regional Airport Vineland Station Parry Sound Harbour Sarnia Chris Hadfield Airport Tobermory Muskoka Airport Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Lagoon City Southeast Shoal Burlington Lift Bridge Welland-Pelham Windsor Airport Port Colborne Erieau Peterborough Municipal Airport CFB Trenton Toronto City Centre Airport Point Petre Oshawa Executive Airport Hamilton Munro Int'l Airport Point Pelee Cobourg Port Colborne - 45142 North Channel - 45154 Ajax - 45159 Lake Nipissing - 45152 Sault Ste. Marie Airport Killarney Lake Simcoe - 45151 Greater Sudbury Airport South Lake Huron - 45149 Lake St Clair - 45147 North Bay Airport South Georgian Bay - 45143 Gore Bay-Manitoulin Airport Grimsby - 45139 Georgian Bay - 45137 Great Duck Island Collingwood Kingston Airport Grenadier Island Brockville Prince Edward Point - 45135 Port Stanley - 45132
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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 6:30 PM EDT 17 June 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.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 17 June 2026 Tonight and Thursday At 6:30 p.m. EDT tonight low 990 mb located over southern Minnesota.
By 6:30 p.m. EDT Thursday low 991 mb located over southern Quebec.

By 6:30 p.m. EDT Thursday trough located on a line north-south
over western Lake Superior.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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