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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 20 March 2025

Today Tonight and Friday.

Wind south 25 knots veering to southwest 20 this afternoon then to northwest 20 this evening. Wind diminishing to northwest 15 Friday morning then backing to west 15 near noon Friday. Wind backing to southwest 15 Friday evening.

Scattered showers beginning near noon changing to scattered flurries near midnight and ending overnight.

Waves

Issued 03:00 AM EDT 20 March 2025
Today Tonight and Friday. Waves 1.5 metres subsiding to 1 Friday morning.

Extended Forecast

Issued 03:00 AM EDT 20 March 2025
Saturday Wind southwest 20 knots veering to northwest 20 in the afternoon.
Sunday Wind north 15 knots veering to east 20 late in the day.
Monday Wind south 20 knots veering to southwest 25 late in the day.

Ice Forecast*

Issued 12:00 PM EDT 19 March 2025 Today Tonight and Thursday Open water except 7 tenths medium lake ice including 2 tenths thick lake ice along parts of the shores in the extreme northeastern section. CONSOLIDATED rotten thick lake ice along parts of the shores in the northeastern section.

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

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

Ice Forecasts

Issued 12:00 PM EDT 19 March 2025 Today Tonight and Thursday

Ice Coverage

Open water except 7 tenths medium lake ice including 2 tenths thick
lake ice along parts of the shores in the extreme northeastern
section. CONSOLIDATED rotten thick lake ice along parts of the
shores in the northeastern section.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 20 March 2025 Today Tonight and Friday At 3:00 a.m. EDT today low 993 mb located over central Lake Huron.
By 3:00 a.m. EDT Friday trough located on a line north-south over
New Hampshire.

At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over northwestern Ontario.
By 3:00 a.m. EDT Friday ridge located on a line northeast-southwest
over Lake Huron.

By 3:00 a.m. EDT Friday trough located on a line northeast-southwest
over northwestern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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