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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 16 November 2025

Today Tonight and Monday.

Gale warning in effect.

Wind west 35 knots veering to northwest 35 early this morning then diminishing to northwest 30 this afternoon. Wind diminishing to northwest 20 Monday evening.

Scattered showers ending this morning.

Waves

Issued 03:00 AM EST 16 November 2025
Today Tonight and Monday. Waves 3 to 4 metres subsiding to 2 to 3 this morning and to 1.5 overnight. Waves subsiding to 1 Monday evening.

Extended Forecast

Issued 03:00 AM EST 16 November 2025
Tuesday Wind northwest 15 knots diminishing to light in the morning.
Wednesday Wind light.
Thursday Wind light.

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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)

Gale warning in effect

Eastern Lake Ontario

Issued 03:00 AM EST 16 November 2025

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. 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 16 November 2025 Today Tonight and Monday At 3:00 a.m. EST today low 984 mb located near Montréal.
By 3:00 a.m. EST Monday departing low 976 mb located over New
Brunswick.

At 3:00 a.m. EST today ridge located on a line northwest-southeast
over North Dakota.
By 3:00 a.m. EST Monday ridge from 1025 mb high located on a line
northwest-southeast over Lake of the Woods.

Great Lakes - Lake Huron Area

Another Region

Marine Weather for Canada

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