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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EST 07 March 2026

Today Tonight and Sunday.

Wind south 20 to 25 knots veering to southwest 20 this afternoon then to west 25 this evening. Wind diminishing to southwest 15 near noon Sunday then increasing to southwest 20 Sunday evening.

Showers and fog patches ending overnight with a risk of thunderstorms.

Waves

Issued 10:30 AM EST 07 March 2026
Today Tonight and Sunday. Over open water waves 0.5 to 1 metre building to 1.5 this evening then subsiding to 1 near noon Sunday.

Extended Forecast

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

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

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Marine Weather for Canada

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