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Lake St. Clair


Marine Forecast

Issued 10:30 AM EDT 22 May 2024

Today Tonight and Thursday.

Strong wind warning in effect.

Wind south 15 knots increasing to southwest 20 near noon then diminishing to southwest 15 early this evening. Wind veering to northwest 15 late this evening then diminishing to northwest 10 near midnight. Wind becoming light early Thursday morning.

Scattered showers ending this evening with a risk of thunderstorms.


Issued 10:30 AM EDT 22 May 2024
Today Tonight and Thursday. Waves 0.5 metres or less building to 0.5 to 1 this afternoon then subsiding to 0.5 or less late overnight.

Extended Forecast

Issued 03:00 AM EDT 22 May 2024
Friday Wind light.
Saturday Wind light.
Sunday Wind light becoming northeast 15 knots late in the day.

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Weather Conditions

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas N Huron - 45003 W Erie - 45005 S Huron - 45008 Lake Ontario - 45012 Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Great Duck Island Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Cove Island Goderich Sarnia Chris Hadfield Airport Tobermory Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal Vineland Station Welland-Pelham Windsor Airport Port Colborne Erieau Point Pelee Burlington Lift Bridge Cobourg Hamilton Munro Int'l Airport Oshawa Executive Airport Point Petre Toronto City Centre Airport CFB Trenton Peterborough Municipal Airport
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 27 April 2024 Forecasts have ended for the season.

Warnings (In effect)

Strong wind warning in effect

Lake St. Clair

Issued 10:30 AM EDT 22 May 2024

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.


Technical Marine Synopsis

Issued 10:30 AM EDT 22 May 2024 Today Tonight and Thursday At 10:30 a.m. EDT today low 988 mb located over Thunder Bay.
By 10:30 a.m. EDT Thursday low 994 mb located over James Bay.

At 10:30 a.m. EDT today cold front located on a line north-south
over Lake Michigan.
By 10:30 a.m. EDT Thursday cold front located on a line
northeast-southwest over southeastern Quebec.

Great Lakes - Lake Erie and Lake Ontario Area

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