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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 21 June 2025

Tonight and Sunday.

Wind southwest 15 to 20 knots becoming southwest 15 Sunday morning.

Scattered showers overnight and Sunday morning with a risk of thunderstorms.

Waves

Issued 06:30 PM EDT 21 June 2025
Tonight and Sunday. Waves 0.5 metres or less building to 0.5 to 1 this evening and to 1 to 1.5 late overnight. Waves subsiding to 0.5 to 1 Sunday evening.

Extended Forecast

Issued 06:30 PM EDT 21 June 2025
Monday Wind southwest 15 knots.
Tuesday Wind west 15 knots diminishing to light late in the day.
Wednesday 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
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 16 May 2025 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 21 June 2025 Tonight and Sunday At 6:30 p.m. EDT tonight departing low 1000 mb located near
James Bay.

At 6:30 p.m. EDT tonight low 996 mb located over South Dakota.
By 6:30 p.m. EDT Sunday low 996 mb located over western North
Dakota.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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