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Western Lake Ontario

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

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