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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 14 September 2026

Tonight and Tuesday.

Strong wind warning in effect.

Wind west 10 knots becoming light this evening then increasing to south 15 late overnight. Wind increasing to south 20 Tuesday evening.

Scattered showers Tuesday evening.

Waves

Issued 06:30 PM EDT 14 September 2026
Tonight and Tuesday. Waves 0.5 metres or less building to 1 early Tuesday morning and to 1 to 1.5 Tuesday evening.

Extended Forecast

Issued 06:30 PM EDT 14 September 2026
Wednesday Wind southwest 15 knots diminishing to light in the morning.
Thursday Wind light.
Friday Wind northwest 15 knots veering to northeast 15 late in the day.

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Map of Great Lakes - Lake Huron marine weather areas Erieau CFB Trenton Muskoka Airport Parry Sound Harbour Toronto City Centre Airport Lake Simcoe Regional Airport Wiarton Airport Point Petre Lagoon City Western Islands Cobourg Port Colborne Windsor Airport Point Pelee Welland-Pelham Vineland Station Burlington Lift Bridge Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Harrow AAFC Hamilton Munro Int'l Airport Tobermory Sarnia Chris Hadfield Airport Oshawa Executive Airport Collingwood Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Peterborough Municipal Airport Brockville Grenadier Island Kingston Airport
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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 14 September 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 14 September 2026 Tonight and Tuesday At 6:30 p.m. EDT tonight high 1024 mb located over Lake Ontario.
By 6:30 p.m. EDT Tuesday high 1029 mb located off New England.

At 6:30 p.m. EDT tonight low 991 mb located over southwestern
Manitoba.
By 6:30 p.m. EDT Tuesday low 995 mb located over southeastern
Hudson Bay.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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