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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 15 March 2026

Today Tonight and Monday.

Wind east 15 knots increasing to east 25 near noon and to east 30 this afternoon. Wind veering to southeast 25 this evening then to southwest 25 Monday morning. Wind increasing to southwest 30 Monday afternoon.

Periods of snow ending this afternoon. Showers Monday afternoon and evening with a risk of thunderstorms changing to scattered flurries. Visibility 1 mile or less in precipitation.

Waves

Issued 10:30 AM EDT 15 March 2026
Today Tonight and Monday. Over open water waves 1 metre building to 1.5 to 2 this afternoon becoming 2 near noon Monday. Waves building to 3 Monday evening.

Extended Forecast

Issued 03:00 AM EDT 15 March 2026
Tuesday Wind southwest 35 knots diminishing to northwest 25 late in the day.
Wednesday Wind northwest 20 knots backing to southwest 15.
Thursday Wind southwest 15 knots diminishing to light.

Ice Forecast*

Issued 12:00 PM EDT 15 March 2026 Today Tonight and Monday 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 15 March 2026 Today Tonight and Monday

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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 15 March 2026 Today Tonight and Monday At 10:30 a.m. EDT today departing ridge located on a line
north-south over eastern Ontario.

At 10:30 a.m. EDT today low 992 mb located over Iowa.
By 10:30 a.m. EDT Monday low 986 mb located over Lake Huron.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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