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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 14 November 2025

Today Tonight and Saturday.

Strong wind warning in effect.

Wind northwest 15 knots diminishing to northwest 10 early this morning then veering to northeast 10 early this evening. Wind increasing to east 15 near midnight then diminishing to southeast 10 Saturday morning. Wind increasing to southwest 20 Saturday afternoon then veering to west 20 Saturday evening.

Scattered showers ending this morning. Showers and mist Saturday afternoon and evening with a risk of thunderstorms. Visibility 1 mile or less in mist.

Waves

Issued 03:00 AM EST 14 November 2025
Today Tonight and Saturday. Waves 0.5 to 1 metre subsiding to 0.5 or less this morning then building to 0.5 to 1 overnight. Waves building to 1 to 1.5 Saturday evening.

Extended Forecast

Issued 03:00 AM EST 14 November 2025
Sunday Wind northwest 30 knots.
Monday Wind northwest 25 knots.
Tuesday Wind northwest 15 knots.

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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)

Strong wind warning in effect

Western Lake Ontario

Issued 03:00 AM EST 14 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 14 November 2025 Today Tonight and Saturday At 3:00 a.m. EST today ridge located on a line northwest-southeast
over eastern Lake Superior.
By 3:00 a.m. EST Saturday ridge located on a line north-south over
the St. Lawrence River.

At 3:00 a.m. EST today trough located on a line north-south over
Saskatchewan.
By 3:00 a.m. EST Saturday trough located on a line north-south
over western Lake Superior.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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