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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EST 15 November 2025

Tonight and Sunday.

Gale warning in effect.

Wind variable 10 knots increasing to west 25 this evening and to west 35 near midnight. Wind diminishing to northwest 30 early Sunday morning.

Scattered showers with a risk of thunderstorms early this evening changing to flurries Sunday evening.

Waves

Issued 06:30 PM EST 15 November 2025
Tonight and Sunday. Waves 0.5 to 1 metre building to 2 near midnight and to 3 late overnight. Waves subsiding to 2 Sunday morning.

Extended Forecast

Issued 06:30 PM EST 15 November 2025
Monday Wind northwest 25 knots.
Tuesday Wind northwest 20 knots.
Wednesday Wind light.

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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)

Gale warning in effect

Western Lake Ontario

Issued 6:30 PM EST 15 November 2025

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. 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 15 November 2025 Tonight and Sunday At 6:30 p.m. EST tonight departing ridge located on a line
northeast-southwest over central Quebec.

At 6:30 p.m. EST tonight low 989 mb located over Georgian Bay.
By 6:30 p.m. EST Sunday low 979 mb located over Prince Edward
Island.

By 6:30 p.m. EST Sunday ridge located on a line northeast-southwest
over Minnesota.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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