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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 31 March 2025

Today Tonight and Tuesday.

Wind south 20 knots veering to southwest 20 early this morning then to west 25 this afternoon. Wind veering to northwest 20 this evening then diminishing to northwest 15 overnight. Wind diminishing to west 10 near noon Tuesday then increasing to northeast 15 Tuesday evening.

Showers and fog patches with a risk of thunderstorms changing to scattered flurries this afternoon and ending this evening.

Waves

Issued 03:00 AM EDT 31 March 2025
Today Tonight and Tuesday. Waves 0.5 to 1 metre building to 1 to 1.5 early this morning then subsiding to 0.5 to 1 Tuesday morning. Waves subsiding to 0.5 Tuesday afternoon.

Extended Forecast

Issued 03:00 AM EDT 31 March 2025
Wednesday Wind northeast 15 knots increasing to east 25 in the afternoon.
Thursday Wind southwest 25 knots diminishing to west 15 late in the day.
Friday Wind light.

Ice Forecast*

Issued 12:00 PM EDT 30 March 2025 Today Tonight and Monday Open water except 1 tenth thick lake ice near parts of the shores in the extreme 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
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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 30 March 2025 Today Tonight and Monday

Ice Coverage

Open water except 1 tenth thick lake ice near parts of the shores in
the extreme northeastern section.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 31 March 2025 Today Tonight and Tuesday At 3:00 a.m. EDT today quasi-stationary ridge located on a line
east-west over Hudson Bay.

At 3:00 a.m. EDT today low 996 mb located over Georgian Bay.
By 3:00 a.m. EDT Tuesday low 995 mb located over the Gulf of
St. Lawrence.

At 3:00 a.m. EDT today ridge located on a line north-south over
Manitoba.
By 3:00 a.m. EDT Tuesday ridge located on a line north-south over
Lake Superior.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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