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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 12 November 2025

Today Tonight and Thursday.

Strong wind warning in effect.

Wind southwest 20 knots veering to west 20 near noon then diminishing to west 15 this evening. Wind diminishing to west 10 Thursday morning.

Scattered flurries changing to scattered showers early this morning and ending this evening.

Waves

Issued 03:00 AM EST 12 November 2025
Today Tonight and Thursday. Waves 1 to 1.5 metres subsiding to 1 early this morning and to 0.5 or less Thursday morning.

Extended Forecast

Issued 03:00 AM EST 12 November 2025
Friday Wind light.
Saturday Wind southeast 15 knots veering to southwest 15 late in the day.
Sunday Wind northwest 20 knots.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Burlington Lift Bridge Oshawa Executive Airport Point Pelee Peterborough Municipal Airport Point Petre Hamilton Munro Int'l Airport Erieau Cobourg Toronto City Centre Airport Port Colborne CFB Trenton South Lake Huron - 45149 Windsor Airport Great Duck Island Gore Bay-Manitoulin Airport North Bay Airport Greater Sudbury Airport Killarney Sault Ste. Marie Airport Ajax - 45159 North Channel - 45154 Lake Nipissing - 45152 Lake Simcoe - 45151 Welland-Pelham Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Vineland Station Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Cove Island Goderich Sarnia Chris Hadfield Airport Western Islands Tobermory Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal
Legend:
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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 16 May 2025 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Lake St. Clair

Issued 03:00 AM EST 12 November 2025

'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.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EST 12 November 2025 Today Tonight and Thursday At 3:00 a.m. EST today ridge located on a line north-south over
northeastern Ontario.
By 3:00 a.m. EST Thursday dissipating ridge located on a line
northwest-southeast over Manitoba.

At 3:00 a.m. EST today departing low 995 mb located over
northeastern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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