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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 21 May 2026

Tonight and Friday.

Wind light becoming northeast 10 knots near midnight then increasing to northeast 15 early Friday morning.

Waves

Issued 06:30 PM EDT 21 May 2026
Tonight and Friday. Waves 0.5 metres or less building to 0.5 to 1 Friday morning.

Extended Forecast

Issued 06:30 PM EDT 21 May 2026
Saturday Wind east 15 knots increasing to east 25 in the afternoon.
Sunday Wind southeast 20 knots.
Monday Wind light.

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

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

Ice Forecasts

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 21 May 2026 Tonight and Friday At 6:30 p.m. EDT tonight high 1031 mb located over eastern Lake
Superior.
By 6:30 p.m. EDT Friday ridge from 1033 mb high located on a line
north-south over western Quebec.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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