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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 30 March 2025

Tonight and Monday.

Wind east 10 knots increasing to southeast 15 this evening then veering to southwest 20 late overnight. Wind veering to west 25 Monday afternoon then to northwest 20 Monday evening.

Rain changing to showers this evening and ending Monday afternoon with a risk of thunderstorms. Fog patches dissipating near noon Monday.

Waves

Issued 06:30 PM EDT 30 March 2025
Tonight and Monday. Waves 0.5 metres or less building to 0.5 to 1 near midnight and to 1 to 1.5 early Monday morning.

Extended Forecast

Issued 06:30 PM EDT 30 March 2025
Tuesday Wind north 15 knots diminishing to light in the afternoon then becoming northeast 15 late in the day.
Wednesday Wind east 15 knots increasing to east 25.
Thursday Wind south 25 knots diminishing to light late in the day.

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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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 6:30 PM EDT 30 March 2025 Tonight and Monday At 6:30 p.m. EDT tonight departing ridge located on a line east-west
over Hudson Bay.

At 6:30 p.m. EDT tonight low 1000 mb located over Lake Michigan.
By 6:30 p.m. EDT Monday low 992 mb located southwest of the Gulf
of St. Lawrence.

By 6:30 p.m. EDT Monday approaching ridge located on a line
north-south over Manitoba.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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