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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 14 March 2026

Today Tonight and Sunday.

Gale warning in effect.

Wind west 40 knots diminishing to west 25 this afternoon and to northwest 15 early this evening. Wind diminishing to northeast 10 near midnight then increasing to east 15 Sunday morning. Wind increasing to east 25 near noon Sunday then veering to southeast 25 Sunday evening.

Flurries ending near noon. Snow Sunday. Visibility 1 mile or less in precipitation.

Waves

Issued 03:00 AM EDT 14 March 2026
Today Tonight and Sunday. Over open water waves 2 to 3 metres building to 3 to 5 early this morning then subsiding to 2 to 3 early this evening. Waves subsiding to 1 late this evening and to 0.5 or less overnight then building to 1 Sunday morning. Waves building to 2 Sunday afternoon.

Extended Forecast

Issued 03:00 AM EDT 14 March 2026
Monday Wind south 30 knots increasing to southwest 35 late in the day.
Tuesday Wind southwest 35 knots diminishing to northwest 25 late in the day.
Wednesday Wind northwest 20 knots backing to southwest 15.

Ice Forecast*

Issued 12:00 PM EDT 13 March 2026 Today Tonight and Saturday Open water except 2 tenths 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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land station Land Station
Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 13 March 2026 Today Tonight and Saturday

Ice Coverage

Open water except 2 tenths 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 03:00 AM EDT 14 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 14 March 2026 Today Tonight and Sunday At 3:00 a.m. EDT today low 997 mb located east of Georgian Bay.
By 3:00 a.m. EDT Sunday departing low 999 mb located northeast of
the Gulf of St. Lawrence.

At 3:00 a.m. EDT today ridge located on a line northwest-southeast
over the Ontario - Manitoba border.
By 3:00 a.m. EDT Sunday ridge located on a line northwest-southeast
over eastern Ontario.

By 3:00 a.m. EDT Sunday approaching warm front located from South
Dakota to Michigan.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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