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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 12 April 2026

Tonight and Monday.

Wind southwest 25 knots diminishing to southwest 15 near noon Monday and to light Monday evening.

Showers overnight. Scattered showers Monday afternoon and evening with a risk of thunderstorms.

Waves

Issued 06:30 PM EDT 12 April 2026
Tonight and Monday. Waves 0.5 metres.

Extended Forecast

Issued 06:30 PM EDT 12 April 2026
Tuesday Wind southwest 15 knots diminishing to light late in the day.
Wednesday Wind southwest 15 knots diminishing to light late in the day.
Thursday Wind light increasing to southwest 20 knots late in the day.

Ice Forecast*

Issued 12:00 PM EDT 12 April 2026 Today Tonight and Monday 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 12 April 2026 Today Tonight and Monday

Ice Coverage

Ice free.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 12 April 2026 Tonight and Monday At 6:30 p.m. EDT tonight low 995 mb located over northwestern
Ontario.
By 6:30 p.m. EDT Monday trough from 972 mb low located on a line
northeast-southwest over southern Ontario.

By 6:30 p.m. EDT Monday building ridge located over northern
Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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