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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 20 April 2026

Tonight and Tuesday.

Wind light becoming south 15 knots this evening then diminishing to southwest 10 Tuesday afternoon.

Scattered showers Tuesday evening.

Waves

Issued 06:30 PM EDT 20 April 2026
Tonight and Tuesday. Waves 0.5 metres or less building to 0.5 to 1 near midnight then subsiding to 0.5 or less Tuesday evening.

Extended Forecast

Issued 06:30 PM EDT 20 April 2026
Wednesday Wind light.
Thursday Wind light.
Friday Wind light becoming south 15 knots.

Ice Forecast*

Issued 12:00 PM EDT 20 April 2026 Today Tonight and Tuesday Ice free.

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

 

[ Canadian Ice Service ]

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas CFB Trenton Port Colborne - 45142 Hamilton Munro Int'l Airport Oshawa Executive Airport Port Stanley - 45132 Lake Nipissing - 45152 Point Petre Georgian Bay - 45137 Toronto City Centre Airport Lake Simcoe - 45151 South Georgian Bay - 45143 Prince Edward Point - 45135 Peterborough Municipal Airport South Lake Huron - 45149 Collingwood Lake St Clair - 45147 Grimsby - 45139 Goderich Lagoon City Kingston Airport Muskoka Airport Parry Sound Harbour Grenadier Island Lake Simcoe Regional Airport Wiarton Airport Brockville Western Islands Cove Island Great Duck Island North Channel - 45154 Sarnia Chris Hadfield Airport Gore Bay-Manitoulin Airport Tobermory Harrow AAFC Long Point North Bay Airport Port Weller St. Catharines / Niagara District Airport Greater Sudbury Airport Southeast Shoal Vineland Station Port Colborne Erieau Cobourg Sault Ste. Marie Airport Windsor Airport Welland-Pelham Killarney Ajax - 45159 Point Pelee Burlington Lift Bridge
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 20 April 2026 Today Tonight and Tuesday

Ice Coverage

Ice free.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 20 April 2026 Tonight and Tuesday At 6:30 p.m. EDT tonight high 1030 mb located over Lake Erie.
By 6:30 p.m. EDT Tuesday high 1028 mb located over New Brunswick.

At 6:30 p.m. EDT tonight trough located on a line north-south over
Lake of the Woods.
By 6:30 p.m. EDT Tuesday trough located on a line
northeast-southwest over northeastern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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