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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 18 April 2026

Tonight and Sunday.

Wind west 20 knots diminishing to west 15 near midnight then increasing to west 20 near noon Sunday. Wind veering to north 15 Sunday evening.

Scattered showers Sunday afternoon becoming scattered flurries or scattered showers.

Waves

Issued 06:30 PM EDT 18 April 2026
Tonight and Sunday. Waves 0.5 to 1 metre.

Extended Forecast

Issued 06:30 PM EDT 18 April 2026
Monday Wind north 15 knots diminishing to light in the morning then becoming southeast 15 late in the day.
Tuesday Wind south 15 knots diminishing to light late in the day.
Wednesday Wind light.

Ice Forecast*

Issued 12:00 PM EDT 18 April 2026 Today Tonight and Sunday 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
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land station Land Station
Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 18 April 2026 Today Tonight and Sunday

Ice Coverage

Ice free.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 18 April 2026 Tonight and Sunday At 6:30 p.m. EDT tonight low 979 mb located over southern Hudson
Bay.
By 6:30 p.m. EDT Sunday low 990 mb located over eastern Hudson Bay.

At 6:30 p.m. EDT tonight cold front located on a line north-south
over eastern Lake Ontario.
By 6:30 p.m. EDT Sunday departing cold front located on a line
northeast-southwest over the Maritimes.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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