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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 12 March 2026

Today Tonight and Friday.

Gale warning in effect.

Wind west 35 knots diminishing to west 25 this morning then veering to northwest 20 early this evening. Wind diminishing to west 10 near midnight then becoming light overnight. Wind increasing to southeast 15 Friday morning and to southeast 25 near noon Friday. Wind veering to southwest 30 Friday evening.

Scattered flurries ending this morning. Snow or rain Friday morning and afternoon. Scattered showers Friday afternoon and evening. Scattered flurries or scattered showers Friday evening.

Waves

Issued 03:00 AM EDT 12 March 2026
Today Tonight and Friday. Over open water waves 2 metres subsiding to 1 to 1.5 this evening and to 0.5 or less overnight. Waves building to 0.5 to 1 near noon Friday and to 1 to 1.5 Friday afternoon.

Extended Forecast

Issued 03:00 AM EDT 12 March 2026
Saturday Wind west 35 knots diminishing to west 25 in the afternoon and to west 15 late in the day.
Sunday Wind east 20 knots increasing to east 30.
Monday Wind southeast 30 knots increasing to southwest 35.

Ice Forecast*

Issued 12:00 PM EDT 11 March 2026 Today Tonight and Thursday Open water except 2 tenths thick lake ice in the 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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land station Land Station
Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 11 March 2026 Today Tonight and Thursday

Ice Coverage

Open water except 2 tenths thick lake ice in the 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 03:00 AM EDT 12 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.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 12 March 2026 Today Tonight and Friday At 3:00 a.m. EDT today departing low 995 mb located over southern
Quebec.

At 3:00 a.m. EDT today ridge located on a line north-south over
northwestern Ontario.
By 3:00 a.m. EDT Friday ridge located on a line north-south over
eastern Ontario.

By 3:00 a.m. EDT Friday approaching low 986 mb located over
western Wisconsin.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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