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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 12 May 2025

Today Tonight and Tuesday.

Wind light becoming east 10 knots early this evening then increasing to east 15 near noon Tuesday.

Scattered showers Tuesday.

Waves

Issued 03:00 AM EDT 12 May 2025
Today Tonight and Tuesday. Waves 0.5 metres or less building to 1 Tuesday afternoon.

Extended Forecast

Issued 03:00 AM EDT 12 May 2025
Wednesday Wind southeast 15 knots diminishing to light late in the day.
Thursday Wind light.
Friday Wind light.

Ice Forecast*

Issued 12:00 PM EDT 11 May 2025 Today Tonight and Monday Ice free.

*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 11 May 2025 Today Tonight and Monday

Ice Coverage

Ice free.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 12 May 2025 Today Tonight and Tuesday At 3:00 a.m. EDT today high 1029 mb located over eastern Ontario.
By 3:00 a.m. EDT Tuesday ridge located on a line north-south over
central Quebec.

At 3:00 a.m. EDT today trough located on a line east-west over
northwestern Ontario.
By 3:00 a.m. EDT Tuesday trough located on a line east-west over
northern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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