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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EST 08 November 2025

Today Tonight and Sunday.

Strong wind warning in effect.

Wind northwest 10 knots becoming light this afternoon then becoming northeast 10 this evening. Wind increasing to northeast 15 late overnight and to northeast 25 early Sunday morning. Wind backing to north 20 Sunday evening.

Periods of rain beginning overnight changing to periods of snow or rain Sunday morning.

Waves

Issued 10:30 AM EST 08 November 2025
Today Tonight and Sunday. Waves 0.5 to 1 metre subsiding to 0.5 or less near noon then building to 0.5 to 1 late overnight. Waves building to 1 to 1.5 Sunday morning.

Extended Forecast

Issued 03:00 AM EST 08 November 2025
Monday Wind north 20 knots.
Tuesday Wind northwest 20 knots backing to west 25.
Wednesday Wind southwest 25 knots veering to west 30.

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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)

Strong wind warning in effect

Western Lake Ontario

Issued 10:30 AM EST 08 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 10:30 AM EST 8 November 2025 Today Tonight and Sunday At 10:30 a.m. EST today ridge located on a line northwest-southeast
over northwestern Ontario.
By 10:30 a.m. EST Sunday ridge located on a line east-west over
northeastern Ontario.

At 10:30 a.m. EST today low 1010 mb located over southwestern Iowa.
By 10:30 a.m. EST Sunday low 1005 mb located over western
Pennsylvania.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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