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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 09 May 2025

Today Tonight and Saturday.

Strong wind warning in effect.

Wind northeast 10 knots becoming variable 10 this morning then becoming southwest 10 this afternoon. Wind veering to west 10 this evening then increasing to northwest 15 overnight. Wind increasing to west 20 Saturday morning then diminishing to northwest 15 Saturday evening.

Scattered showers this afternoon and tonight. Fog patches forming near midnight and dissipating Saturday morning.

Waves

Issued 03:00 AM EDT 09 May 2025
Today Tonight and Saturday. Waves 0.5 metres or less building to 1 Saturday morning.

Extended Forecast

Issued 03:00 AM EDT 09 May 2025
Sunday Wind north 15 knots diminishing to light in the morning.
Monday Wind light.
Tuesday Wind light.

Ice Forecast*

Issued 12:00 PM EDT 8 May 2025 Today Tonight and Friday 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 8 May 2025 Today Tonight and Friday

Ice Coverage

Ice free.

Warnings

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 03:00 AM EDT 09 May 2025

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 9 May 2025 Today Tonight and Saturday At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over Lake Superior.
By 3:00 a.m. EDT Saturday ridge located on a line
northeast-southwest over southwestern Ontario.

At 3:00 a.m. EDT today cold front located over the Ontario -
Manitoba border.
By 3:00 a.m. EDT Saturday cold front located from James Bay to
Whitefish Bay.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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