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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 11 March 2026

Today Tonight and Thursday.

Wind variable 10 knots increasing to southwest 20 near noon then veering to northwest 20 early this evening. Wind backing to west 15 Thursday morning then diminishing to variable 10 Thursday evening.

Showers or scattered flurries ending near midnight with a risk of thunderstorms. Scattered flurries or scattered showers Thursday afternoon. Visibility 1 mile or less in showers.

Waves

Issued 10:30 AM EDT 11 March 2026
Today Tonight and Thursday. Mainly ice covered.

Extended Forecast

Issued 03:00 AM EDT 11 March 2026
Friday Wind south 15 knots increasing to southwest 25 in the afternoon then veering to west 30 late in the day.
Saturday Wind northwest 20 knots diminishing to light.
Sunday Wind east 15 knots backing to north 20 late in the day.

Ice Forecast*

Issued 12:00 PM EDT 11 March 2026 Today Tonight and Thursday Open water except 5 tenths thick lake ice in the eastern section.

*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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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 11 March 2026 Today Tonight and Thursday

Ice Coverage

Open water except 5 tenths thick lake ice in the eastern section.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 11 March 2026 Today Tonight and Thursday At 10:30 a.m. EDT today deepening low 998 mb located over eastern
Michigan.
By 10:30 a.m. EDT Thursday low 993 mb located over eastern Quebec.

By 10:30 a.m. EDT Thursday ridge located on a line north-south
over northern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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