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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EST 09 November 2025

Tonight and Monday.

Strong wind warning in effect.

Wind northeast 25 knots backing to north 20 this evening then diminishing to north 15 late overnight. Wind backing to northwest 15 near noon Monday.

Periods of snow with a risk of freezing rain changing to scattered flurries near midnight and ending Monday afternoon.

Waves

Issued 06:30 PM EST 09 November 2025
Tonight and Monday. Waves 1 to 1.5 metres subsiding to 1 near midnight.

Extended Forecast

Issued 06:30 PM EST 09 November 2025
Tuesday Wind northwest 20 knots increasing to southwest 30 late in the day.
Wednesday Wind southwest 30 knots.
Thursday Wind west 25 knots.

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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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land station Land Station
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 6:30 PM EST 09 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 9 November 2025 Tonight and Monday At 6:30 p.m. EST tonight dissipating ridge located on a line
east-west over northern Ontario.

At 6:30 p.m. EST tonight low 1005 mb located over eastern
Pennsylvania.
By 6:30 p.m. EST Monday low 998 mb located over the Eastern
Seaboard.

At 6:30 p.m. EST tonight dissipating cold front located on a line
northeast-southwest over northern Ontario.

At 6:30 p.m. EST tonight ridge located on a line north-south over
North Dakota.
By 6:30 p.m. EST Monday ridge located on a line northeast-southwest
over northern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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