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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 18 May 2025

Today Tonight and Monday.

Strong wind warning in effect.

Wind west 25 knots diminishing to west 15 this afternoon and to northwest 10 early this evening. Wind increasing to west 15 near noon Monday then diminishing to north 10 Monday evening.

Scattered showers ending this evening. Fog patches dissipating this morning.

Waves

Issued 03:00 AM EDT 18 May 2025
Today Tonight and Monday. Waves 0.5 to 1 metre building to 1.5 early this morning then subsiding to 1 this afternoon. Waves subsiding to 0.5 or less this evening then building to 0.5 to 1 Monday afternoon.

Extended Forecast

Issued 03:00 AM EDT 18 May 2025
Tuesday Wind north 15 knots diminishing to light in the morning.
Wednesday Wind northeast 15 knots veering to east 20 late in the day.
Thursday Wind east 20 knots.

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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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land station Land Station
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 18 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 18 May 2025 Today Tonight and Monday At 3:00 a.m. EDT today low 994 mb located over southern Quebec.
By 3:00 a.m. EDT Monday low 995 mb located over southern New
Brunswick.

At 3:00 a.m. EDT today ridge located on a line north-south over
the Ontario - Manitoba border.
By 3:00 a.m. EDT Monday ridge located on a line north-south over
western Lake Superior.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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