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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 06 June 2026

Tonight and Sunday.

Strong wind warning in effect.

Wind west 20 knots diminishing to west 15 this evening and to west 10 Sunday afternoon. Wind becoming light Sunday evening.

Scattered showers this evening with a risk of thunderstorms. Fog patches dissipating Sunday morning.

Waves

Issued 06:30 PM EDT 06 June 2026
Tonight and Sunday. Waves 1 to 1.5 metres subsiding to 0.5 to 1 near midnight and to 0.5 or less Sunday evening.

Extended Forecast

Issued 06:30 PM EDT 06 June 2026
Monday Wind light becoming east 15 knots in the afternoon.
Tuesday Wind southeast 15 knots diminishing to light.
Wednesday Wind south 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 06 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 or Weatheradio stations.

Watches (In effect)

Squall watch in effect

Eastern Lake Ontario

Issued 6:24 PM EDT 06 June 2026 Scattered thunderstorms early this evening may produce wind gusts up to 40 knots.

Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway.

Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 6 June 2026 Tonight and Sunday At 6:30 p.m. EDT tonight departing low 1003 mb located over
southwestern 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 northeast-southwest
over eastern Lake Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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