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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 17 November 2025

Today Tonight and Tuesday.

Strong wind warning in effect.

Wind northwest 25 knots diminishing to northwest 15 overnight and to northwest 10 Tuesday morning. Wind becoming light Tuesday afternoon.

Scattered showers or scattered flurries ending near noon.

Waves

Issued 03:00 AM EST 17 November 2025
Today Tonight and Tuesday. Waves 1.5 metres subsiding to 1 this morning and to 0.5 or less near noon Tuesday.

Extended Forecast

Issued 03:00 AM EST 17 November 2025
Wednesday Wind light.
Thursday Wind light becoming southeast 15 knots late in the day.
Friday Wind south 20 knots diminishing to northwest 15 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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land station Land Station
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)

Strong wind warning in effect

Western Lake Ontario

Issued 06:06 AM EST 17 November 2025

'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.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EST 17 November 2025 Today Tonight and Tuesday At 3:00 a.m. EST today departing low 980 mb located north of
Nova Scotia.

At 3:00 a.m. EST today ridge located on a line northwest-southeast
over Manitoba.
By 3:00 a.m. EST Tuesday ridge located from Lake Superior to Lake
Huron then to Lake Erie.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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