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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 07 November 2025

Today Tonight and Saturday.

Strong wind warning in effect.

Wind variable 10 knots increasing to south 20 early this morning then veering to southwest 20 early this evening. Wind veering to west 25 near midnight then diminishing to northwest 10 near noon Saturday. Wind veering to northeast 10 Saturday evening.

Showers this afternoon and this evening.

Waves

Issued 03:00 AM EST 07 November 2025
Today Tonight and Saturday. Waves 0.5 metres building to 1.5 early this morning and to 2 overnight. Waves subsiding to 1.5 Saturday morning and to 0.5 or less Saturday afternoon.

Extended Forecast

Issued 03:00 AM EST 07 November 2025
Sunday Wind northeast 15 knots increasing to northeast 25 in the afternoon.
Monday Wind north 20 knots.
Tuesday Wind northwest 15 knots increasing to west 25.

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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

Eastern Lake Ontario

Issued 03:00 AM EST 07 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 3:00 AM EST 7 November 2025 Today Tonight and Saturday At 3:00 a.m. EST today ridge located on a line north-south over
eastern New York State.
By 3:00 a.m. EST Saturday departing ridge located on a line
northwest-southeast over the Gulf of St. Lawrence.

At 3:00 a.m. EST today low 997 mb located near Duluth.
By 3:00 a.m. EST Saturday low 992 mb located over southern Quebec.

By 3:00 a.m. EST Saturday ridge located on a line
northwest-southeast over Manitoba.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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