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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EST 16 November 2025

Tonight and Monday.

Gale warning in effect.

Wind northwest 35 knots diminishing to northwest 25 this evening. Wind northwest 20 Monday.

Scattered showers or scattered flurries ending near noon Monday.

Waves

Issued 06:30 PM EST 16 November 2025
Tonight and Monday. Waves 2 metres subsiding to 1.5 near midnight and to 1 Monday morning.

Extended Forecast

Issued 06:30 PM EST 16 November 2025
Tuesday Wind northwest 20 knots diminishing to light in the afternoon.
Wednesday Wind light.
Thursday Wind light increasing to south 20 knots late in the day.

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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)

Gale warning in effect

Western Lake Ontario

Issued 6:30 PM EST 16 November 2025

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. 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 EST 16 November 2025 Tonight and Monday At 6:30 p.m. EST tonight low 979 mb located over Nova Scotia.
By 6:30 p.m. EST Monday departing low 979 mb located over the Gulf
of St. Lawrence.

At 6:30 p.m. EST tonight ridge located on a line northwest-southeast
over Minnesota.
By 6:30 p.m. EST Monday ridge located on a line northwest-southeast
over Lower Michigan.

Great Lakes - Lake Huron Area

Another Region

Marine Weather for Canada

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