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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EST 15 November 2025

Tonight and Sunday.

Gale warning in effect.

Wind southeast 15 knots increasing to west 25 this evening and to west 35 near midnight. Wind veering to northwest 35 Sunday morning then diminishing to northwest 30 Sunday evening.

Scattered showers ending Sunday afternoon. Risk of thunderstorms early this 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 to 4 late overnight. Waves subsiding to 2 to 3 near noon Sunday.

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 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
Legend:
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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

Eastern 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 Erie and Lake Ontario Area

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Marine Weather for Canada

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