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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 19 July 2026

Today Tonight and Monday.

Wind north 10 knots veering to northeast 10 early this evening then becoming light near midnight. Wind becoming south 10 near noon Monday then increasing to south 15 Monday evening.

Waves

Issued 10:30 AM EDT 19 July 2026
Today Tonight and Monday. Waves 0.5 metres or less.

Extended Forecast

Issued 03:00 AM EDT 19 July 2026
Tuesday Wind southwest 15 knots veering to northwest 15 late in the day.
Wednesday Wind northwest 15 knots.
Thursday Wind northwest 15 knots diminishing to 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 10:30 AM EDT 19 July 2026 Today Tonight and Monday At 10:30 a.m. EDT today departing low 993 mb located over the Gulf
of St. Lawrence.

At 10:30 a.m. EDT today ridge located over Lake Michigan.
By 10:30 a.m. EDT Monday ridge located over Pennsylvania.

At 10:30 a.m. EDT Monday approaching low located east of the
Ontario - Manitoba border.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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