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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 19 November 2025

Today Tonight and Thursday.

Wind north 10 knots becoming light this morning then becoming southeast 10 Thursday morning. Wind increasing to south 15 Thursday evening.

Waves

Issued 03:00 AM EST 19 November 2025
Today Tonight and Thursday. Waves 0.5 metres or less.

Extended Forecast

Issued 03:00 AM EST 19 November 2025
Friday Wind southwest 15 knots veering to northwest 15 late in the day.
Saturday Wind northwest 15 knots diminishing to light.
Sunday Wind southwest 15 knots veering to west 20.

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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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EST 19 November 2025 Today Tonight and Thursday At 3:00 a.m. EST today high 1025 mb located over Upper Michigan.
By 3:00 a.m. EST Thursday high 1026 mb located over New York State.

At 3:00 a.m. EST today trough located on a line north-south over
Saskatchewan.
By 3:00 a.m. EST Thursday approaching trough located on a line
north-south over northwestern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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