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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 19 April 2026

Today Tonight and Monday.

Wind west 15 knots increasing to west 20 near noon then veering to north 15 early this evening. Wind diminishing to northwest 10 Monday morning then becoming light Monday afternoon. Wind becoming southeast 15 Monday evening.

Scattered showers beginning near noon becoming scattered flurries or scattered showers this evening and ending overnight.

Waves

Issued 03:00 AM EDT 19 April 2026
Today Tonight and Monday. Waves 0.5 to 1 metre subsiding to 0.5 or less near noon Monday.

Extended Forecast

Issued 03:00 AM EDT 19 April 2026
Tuesday Wind south 15 knots diminishing to light late in the day.
Wednesday Wind light.
Thursday Wind light becoming south 15 knots late in the day.

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 3:00 AM EDT 19 April 2026 Today Tonight and Monday At 3:00 a.m. EDT today low 982 mb located over eastern Hudson Bay.
By 3:00 a.m. EDT Monday departing low 999 mb located over northern
Quebec.

At 3:00 a.m. EDT today departing cold front located on a line
north-south over the St. Lawrence River.

At 3:00 a.m. EDT today high 1024 mb located over southern Manitoba.
By 3:00 a.m. EDT Monday high 1029 mb located over Wisconsin.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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