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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 22 May 2025

Tonight and Friday.

Strong wind warning in effect.

Wind east 20 knots diminishing to east 15 near midnight and to east 10 late overnight. Wind becoming variable 10 Friday morning then increasing to west 15 Friday afternoon. Wind diminishing to west 10 Friday evening.

Periods of rain and fog patches.

Waves

Issued 06:30 PM EDT 22 May 2025
Tonight and Friday. Waves 1 metre subsiding to 0.5 or less late overnight then building to 0.5 to 1 Friday evening.

Extended Forecast

Issued 06:30 PM EDT 22 May 2025
Saturday Wind light becoming west 15 knots in the morning.
Sunday Wind west 15 knots.
Monday Wind light.

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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
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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 6:30 PM 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 6:30 PM EDT 22 May 2025 Tonight and Friday At 6:30 p.m. EDT tonight low 1002 mb located west of Lake Ontario.
By 6:30 p.m. EDT Friday low 1009 mb located east of Lake Ontario.

At 6:30 p.m. EDT tonight quasi-stationary ridge located on a line
northeast-southwest over northwestern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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