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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 22 May 2025

Today Tonight and Friday.

Strong wind warning in effect.

Wind east 25 knots diminishing to east 15 near midnight and to variable 10 Friday morning. Wind increasing to west 15 Friday afternoon.

Periods of rain and fog patches.

Waves

Issued 03:00 AM EDT 22 May 2025
Today Tonight and Friday. Waves 2 metres subsiding to 1.5 early this evening and to 0.5 to 1 overnight.

Extended Forecast

Issued 03:00 AM EDT 22 May 2025
Saturday Wind west 15 knots.
Sunday Wind west 15 knots.
Monday Wind light.

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

*Ice Forecast and Warnings also apply to U.S. waters

Ice Forecasts

Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 03:00 AM EDT 22 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 22 May 2025 Today Tonight and Friday At 3:00 a.m. EDT today low 1002 mb located north of Lake Erie.
By 3:00 a.m. EDT Friday low 1005 mb located over Lake Ontario.

At 3:00 a.m. EDT today quasi-stationary ridge located on a line
north-south over northwestern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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