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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EST 07 March 2026

Today Tonight and Sunday.

Wind south 20 knots veering to southwest 20 this afternoon then to west 15 this evening. Wind diminishing to southwest 10 late overnight then increasing to southwest 15 Sunday morning.

Scattered showers ending Sunday morning. Risk of thunderstorms today. Fog patches dissipating this evening.

Waves

Issued 10:30 AM EST 07 March 2026
Today Tonight and Sunday. Mainly ice covered.

Extended Forecast

Issued 03:00 AM EST 07 March 2026
Monday Wind southwest 20 knots diminishing to light late in the day.
Tuesday Wind light becoming southwest 15 knots.
Wednesday Wind light increasing to north 20 knots.

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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 16 May 2025 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EST 7 March 2026 Today Tonight and Sunday At 10:30 a.m. EST today trough located on a line northeast-southwest
over northern Lake Michigan.
By 10:30 a.m. EDT Sunday trough located on a line
northeast-southwest over the Eastern Seaboard.

At 10:30 a.m. EST today ridge located from Manitoba to Lake of
the Woods then to South Dakota.
By 10:30 a.m. EDT Sunday ridge located from Hudson Bay to Quebec
then to Lake Erie.

At 10:30 a.m. EST today low 990 mb located over northern
Saskatchewan.
By 10:30 a.m. EDT Sunday low 984 mb located over northern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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