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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EST 06 November 2025

Tonight and Friday.

Strong wind warning in effect.

Wind west 10 knots backing to south 10 near midnight then increasing to south 20 early Friday morning. Wind veering to southwest 20 near noon Friday.

Showers Friday afternoon and evening.

Waves

Issued 06:30 PM EST 06 November 2025
Tonight and Friday. Waves 0.5 metres or less building to 0.5 to 1 Friday morning and to 1.5 Friday afternoon.

Extended Forecast

Issued 06:30 PM EST 06 November 2025
Saturday Wind west 20 knots diminishing to light late in the day.
Sunday Wind northeast 15 knots increasing to northeast 25.
Monday Wind north 20 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 6:30 PM EST 06 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 6:30 PM EST 6 November 2025 Tonight and Friday At 6:30 p.m. EST tonight ridge located on a line north-south over
Lake Ontario.
By 6:30 p.m. EST Friday departing ridge located on a line
north-south over Nova Scotia.

At 6:30 p.m. EST tonight low 999 mb located over western Minnesota.
By 6:30 p.m. EST Friday low 990 mb located over Lake Nipissing.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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