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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 16 March 2026

Tonight and Tuesday.

Gale warning in effect.

Wind southwest 30 knots increasing to southwest 35 near midnight then diminishing to west 30 near noon Tuesday. Wind diminishing to west 20 Tuesday evening.

Rain changing to snow this evening then to scattered flurries overnight. Visibility 1 mile or less in precipitation.

Freezing spray warning in effect.

Over open water freezing spray Tuesday. Risk of freezing spray late Tuesday evening.

Waves

Issued 06:30 PM EDT 16 March 2026
Tonight and Tuesday. Over open water waves 2 metres building to 3 to 4 late overnight then subsiding to 2 to 3 Tuesday afternoon. Waves subsiding to 1.5 Tuesday evening.

Extended Forecast

Issued 06:30 PM EDT 16 March 2026
Wednesday Wind northwest 25 knots diminishing to light in the morning then becoming south 15 in the afternoon.
Thursday Wind southwest 15 knots diminishing to light late in the day.
Friday Wind light becoming south 15 knots.

Ice Forecast*

Issued 12:00 PM EDT 16 March 2026 Today Tonight and Tuesday Open water except 1 tenth thick lake ice in the extreme northeastern section. Consolidated rotten thick lake ice along parts of the shore and in the Bay of Quinte.

*Ice Forecast and Warnings also apply to U.S. waters

 

[ Canadian Ice Service ]

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas CFB Trenton Port Colborne - 45142 Hamilton Munro Int'l Airport Oshawa Executive Airport Port Stanley - 45132 Lake Nipissing - 45152 Point Petre Georgian Bay - 45137 Toronto City Centre Airport Lake Simcoe - 45151 South Georgian Bay - 45143 Prince Edward Point - 45135 Peterborough Municipal Airport South Lake Huron - 45149 Collingwood Lake St Clair - 45147 Grimsby - 45139 Goderich Lagoon City Kingston Airport Muskoka Airport Parry Sound Harbour Grenadier Island Lake Simcoe Regional Airport Wiarton Airport Brockville Western Islands Cove Island Great Duck Island North Channel - 45154 Sarnia Chris Hadfield Airport Gore Bay-Manitoulin Airport Tobermory Harrow AAFC Long Point North Bay Airport Port Weller St. Catharines / Niagara District Airport Greater Sudbury Airport Southeast Shoal Vineland Station Port Colborne Erieau Cobourg Sault Ste. Marie Airport Windsor Airport Welland-Pelham Killarney Ajax - 45159 Point Pelee Burlington Lift Bridge
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Ice Conditions

*Ice Forecast and Warnings also apply to U.S. waters

Ice Forecasts

Issued 12:00 PM EDT 16 March 2026 Today Tonight and Tuesday

Ice Coverage

Open water except 1 tenth thick lake ice in the extreme northeastern
section. Consolidated rotten thick lake ice along parts of the shore
and in the Bay of Quinte.

Warnings

Warnings (In effect)

Gale warning in effect

Eastern Lake Ontario

Issued 9:40 PM EDT 16 March 2026

'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.

Freezing spray warning in effect

Eastern Lake Ontario

Issued 9:40 PM EDT 16 March 2026

Moderate or severe freezing spray is 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 EDT 16 March 2026 Tonight and Tuesday At 6:30 p.m. EDT tonight low 987 mb located over eastern Ontario.
By 6:30 p.m. EDT Tuesday departing low 953 mb located over northern
Quebec.

By 6:30 p.m. EDT Tuesday ridge located on a line north-south over
northern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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