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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 22 April 2025

Tonight and Wednesday.

Wind west 15 knots diminishing to northwest 10 this evening then becoming light near midnight. Wind becoming east 10 Wednesday evening.

Waves

Issued 06:30 PM EDT 22 April 2025
Tonight and Wednesday. Waves 0.5 to 1 metre subsiding to less than 0.5 near midnight.

Extended Forecast

Issued 06:30 PM EDT 22 April 2025
Thursday Wind light.
Friday Wind east 15 knots diminishing to light late in the day.
Saturday Wind northwest 20 knots.

Ice Forecast*

Issued 12:00 PM EDT 22 April 2025 Today Tonight and Wednesday Open water.

*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 Harrow AAFC Burlington Lift Bridge Oshawa Executive Airport Point Pelee Peterborough Municipal Airport Point Petre Hamilton Munro Int'l Airport Erieau Cobourg Toronto City Centre Airport Port Colborne CFB Trenton South Lake Huron - 45149 Windsor Airport Great Duck Island Gore Bay-Manitoulin Airport North Bay Airport Greater Sudbury Airport Killarney Sault Ste. Marie Airport Ajax - 45159 North Channel - 45154 Lake Nipissing - 45152 Lake Simcoe - 45151 Welland-Pelham Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Vineland Station Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Cove Island Goderich Sarnia Chris Hadfield Airport Western Islands Tobermory Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal
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 22 April 2025 Today Tonight and Wednesday

Ice Coverage

Open water.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 22 April 2025 Tonight and Wednesday At 6:30 p.m. EDT tonight low 1006 mb located southeast of James Bay.
By 6:30 p.m. EDT Wednesday departing low 1015 mb located near the
Gulf of St. Lawrence.

At 6:30 p.m. EDT tonight ridge located on a line north-south over
Whitefish Bay.
By 6:30 p.m. EDT Wednesday ridge located from James Bay to the
St. Lawrence River.

At 6:30 p.m. EDT tonight low 1007 mb located southwest of Lake of
the Woods.
By 6:30 p.m. EDT Wednesday low 1017 mb located near Thunder Bay.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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