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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EST 09 November 2025

Tonight and Monday.

Strong wind warning in effect.

Wind north 15 knots increasing to north 20 late overnight then backing to northwest 20 Monday morning. Wind diminishing to northwest 15 Monday afternoon.

Scattered showers or flurries this evening. Flurries overnight. Scattered flurries Monday late in the day. Visibility 1 mile or less in flurries.

Waves

Issued 06:30 PM EST 09 November 2025
Tonight and Monday. Waves 0.5 to 1 metre.

Extended Forecast

Issued 06:30 PM EST 09 November 2025
Tuesday Wind west 15 knots increasing to southwest 25 late in the day.
Wednesday Wind southwest 25 knots.
Thursday Wind west 20 knots.

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Map of Great Lakes - Lake Huron marine weather areas Cove Island Goderich Oshawa Executive Airport CFB Trenton Western Islands Wiarton Airport Point Petre Lake Simcoe Regional Airport Parry Sound Harbour Toronto City Centre Airport Muskoka Airport Lagoon City Brockville Hamilton Munro Int'l Airport Sarnia Chris Hadfield Airport Tobermory Cobourg Harrow AAFC Long Point Port Weller Burlington Lift Bridge St. Catharines / Niagara District Airport Southeast Shoal Point Pelee Vineland Station Welland-Pelham Erieau Windsor Airport Port Colborne Killarney South Georgian Bay - 45143 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Lake St Clair - 45147 South Lake Huron - 45149 Sault Ste. Marie Airport Lake Simcoe - 45151 Collingwood Greater Sudbury Airport North Bay Airport Kingston Airport Peterborough Municipal Airport Grenadier Island Port Colborne - 45142 Great Duck Island Ajax - 45159 Gore Bay-Manitoulin Airport North Channel - 45154 Lake Nipissing - 45152
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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 6:30 PM EST 09 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 6:30 PM EST 9 November 2025 Tonight and Monday At 6:30 p.m. EST tonight dissipating ridge located on a line
east-west over northern Ontario.

At 6:30 p.m. EST tonight low 1005 mb located over eastern
Pennsylvania.
By 6:30 p.m. EST Monday low 998 mb located over the Eastern
Seaboard.

At 6:30 p.m. EST tonight dissipating cold front located on a line
northeast-southwest over northern Ontario.

At 6:30 p.m. EST tonight ridge located on a line north-south over
North Dakota.
By 6:30 p.m. EST Monday ridge located on a line northeast-southwest
over northern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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