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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 04 July 2026

Today Tonight and Sunday.

Wind light becoming northeast 10 knots near noon Sunday then increasing to northeast 15 Sunday evening.

Scattered showers ending near midnight with a risk of thunderstorms. Scattered showers Sunday evening with a risk of thunderstorms.

Waves

Issued 03:00 AM EDT 04 July 2026
Today Tonight and Sunday. Waves 0.5 metres or less building to 0.5 to 1 Sunday evening.

Extended Forecast

Issued 03:00 AM EDT 04 July 2026
Monday Wind northeast 15 knots.
Tuesday Wind east 15 knots diminishing to light.
Wednesday 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 3:00 AM EDT 4 July 2026 Today Tonight and Sunday At 3:00 a.m. EDT today ridge located on a line north-south over
northwestern Ontario.
By 3:00 a.m. EDT Sunday ridge located on a line north-south over
northeastern Ontario.

At 3:00 a.m. EDT today departing trough located on a line
northeast-southwest over southern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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