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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 18 April 2026

Today Tonight and Sunday.

Wind southwest 20 knots veering to northwest 20 this afternoon then backing to west 15 late overnight. Wind veering to northwest 20 Sunday afternoon then to north 15 Sunday evening.

Scattered showers ending this evening. Risk of thunderstorms late this morning and this afternoon. Scattered showers Sunday afternoon and evening becoming scattered flurries or scattered showers.

Waves

Issued 10:30 AM EDT 18 April 2026
Today Tonight and Sunday. Waves 1 metre subsiding to 0.5 early Sunday morning then building to 1 Sunday evening.

Extended Forecast

Issued 03:00 AM EDT 18 April 2026
Monday Wind northwest 15 knots diminishing to light in the morning.
Tuesday Wind south 15 knots increasing to south 20.
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 Huron marine weather areas Wiarton Airport Western Islands Cove Island Goderich Lake Simcoe Regional Airport Vineland Station Parry Sound Harbour Sarnia Chris Hadfield Airport Tobermory Muskoka Airport Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Lagoon City Southeast Shoal Burlington Lift Bridge Welland-Pelham Windsor Airport Port Colborne Erieau Peterborough Municipal Airport CFB Trenton Toronto City Centre Airport Point Petre Oshawa Executive Airport Hamilton Munro Int'l Airport Point Pelee Cobourg Port Colborne - 45142 North Channel - 45154 Ajax - 45159 Lake Nipissing - 45152 Sault Ste. Marie Airport Killarney Lake Simcoe - 45151 Greater Sudbury Airport South Lake Huron - 45149 Lake St Clair - 45147 North Bay Airport South Georgian Bay - 45143 Gore Bay-Manitoulin Airport Grimsby - 45139 Georgian Bay - 45137 Great Duck Island Collingwood Kingston Airport Grenadier Island Brockville Prince Edward Point - 45135 Port Stanley - 45132
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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

Warnings (In effect)

Squall warning in effect

Lake St. Clair

Issued 12:22 PM EDT 18 April 2026 Squalls with wind gusts up to 35 knots are expected or occurring in the area.

A line of showers over Lower Michigan is moving east at 25 knots and will reach the international border around 1 p.m. EDT.

Mariners are advised to prepare for squalls. If underway, seek safe harbour immediately.

Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 18 April 2026 Today Tonight and Sunday At 10:30 a.m. EDT today low 986 mb located over James Bay.
By 10:30 a.m. EDT Sunday low 980 mb located over eastern Hudson Bay.

At 10:30 a.m. EDT today cold front located on a line north-south
over western Lake Huron.
By 10:30 a.m. EDT Sunday departing cold front located on a line
northeast-southwest over eastern Quebec.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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