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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 12 April 2026

Today Tonight and Monday.

Wind south 15 knots veering to southwest 20 this afternoon then diminishing to southwest 15 Monday afternoon. Wind diminishing to light Monday evening.

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

Waves

Issued 10:30 AM EDT 12 April 2026
Today Tonight and Monday. Waves less than 0.5 metres building to 0.5 this afternoon then subsiding to less than 0.5 Monday evening.

Extended Forecast

Issued 03:00 AM EDT 12 April 2026
Tuesday Wind light becoming southwest 15 knots in the morning.
Wednesday Wind southwest 15 knots diminishing to light late in the day.
Thursday Wind light becoming southwest 15 knots.

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
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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 12 April 2026 Today Tonight and Monday

Ice Coverage

Ice free.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 12 April 2026 Today Tonight and Monday At 10:30 a.m. EDT today departing ridge located on a line
north-south over western Quebec.

At 10:30 a.m. EDT today low 994 mb located over eastern North
Dakota.
By 10:30 a.m. EDT Monday trough from 979 mb low 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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