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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 11 June 2026

Tonight and Friday.

Strong wind warning in effect.

Wind south 10 knots becoming light late overnight then becoming south 10 Friday morning. Wind increasing to west 20 Friday afternoon then diminishing to west 15 Friday evening.

Scattered showers this evening with a risk of thunderstorms. Scattered showers overnight and Friday with a risk of thunderstorms. Fog patches dissipating Friday afternoon.

Waves

Issued 06:30 PM EDT 11 June 2026
Tonight and Friday. Waves 0.5 metres building to 1 Friday evening.

Extended Forecast

Issued 06:30 PM EDT 11 June 2026
Saturday Wind west 15 knots.
Sunday Wind southwest 15 knots veering to northwest 15.
Monday Wind west 15 knots.

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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

Eastern Lake Ontario

Issued 6:30 PM EDT 11 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 11 June 2026 Tonight and Friday At 6:30 p.m. EDT tonight quasi-stationary low 984 mb located over
northeastern Manitoba.

At 6:30 p.m. EDT tonight trough located on a line north-south over
northwestern Ontario.
By 6:30 p.m. EDT Friday trough located on a line northwest-southeast
over James Bay.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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