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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 21 June 2025

Today Tonight and Sunday.

Wind light becoming southeast 10 knots this morning then increasing to southwest 15 early this evening. Wind increasing to southwest 15 to 20 near midnight then becoming southwest 15 Sunday morning.

Scattered showers today with a risk of thunderstorms. Scattered showers overnight and Sunday morning with a risk of thunderstorms. Fog patches dissipating near noon.

Waves

Issued 03:00 AM EDT 21 June 2025
Today Tonight and Sunday. Waves 0.5 metres or less building to 0.5 to 1 this evening and to 1 to 1.5 overnight. Waves subsiding to 0.5 to 1 Sunday evening.

Extended Forecast

Issued 03:00 AM 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 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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 21 June 2025 Today Tonight and Sunday At 3:00 a.m. EDT today departing ridge located on a line north-south
over western Quebec.

At 3:00 a.m. EDT today low 992 mb located over South Dakota.
By 3:00 a.m. EDT Sunday low 1001 mb located over southern Quebec.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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