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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EST 13 November 2025

Today Tonight and Friday.

Strong wind warning in effect.

Wind northwest 20 knots diminishing to northwest 15 near midnight and to northwest 10 early Friday morning.

Scattered showers ending Friday morning.

Waves

Issued 10:30 AM EST 13 November 2025
Today Tonight and Friday. Waves 2 metres subsiding to 1.5 near noon and to 1 late overnight.

Extended Forecast

Issued 03:00 AM EST 13 November 2025
Saturday Wind light increasing to west 20 knots late in the day.
Sunday Wind northwest 30 knots.
Monday Wind northwest 25 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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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

Eastern Lake Ontario

Issued 10:30 AM EST 13 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 13 November 2025 Today Tonight and Friday At 10:30 a.m. EST today departing trough located on a line
north-south over Hudson Bay.

At 10:30 a.m. EST today ridge located on a line northwest-southeast
over Minnesota.
By 10:30 a.m. EST Friday ridge located on a line north-south over
northeastern Ontario.

By 10:30 a.m. EST Friday approaching trough located on a line
north-south over western Manitoba.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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