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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EST 16 December 2025

Tonight and Wednesday.

Gale warning in effect.

Wind southwest 20 knots increasing to southwest 30 near midnight and to southwest 35 Wednesday morning. Wind diminishing to west 15 Wednesday evening.

Scattered showers Wednesday.

Waves

Issued 06:30 PM EST 16 December 2025
Tonight and Wednesday. Waves 1 to 1.5 metres building to 2 to 3 late overnight.

Extended Forecast

Issued 06:30 PM EST 16 December 2025
Thursday Wind south 15 knots increasing to south 25 late in the day.
Friday Wind south 25 knots increasing to southwest 35.
Saturday Wind west 35 knots diminishing to southeast 15.

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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 6:30 PM EST 16 December 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 6:30 PM EST 16 December 2025 Tonight and Wednesday At 6:30 p.m. EST tonight departing ridge located on a line
northeast-southwest over the East Coast of the U.S.

At 6:30 p.m. EST tonight trough from low located on a line
northeast-southwest over Lake Nipigon.
By 6:30 p.m. EST Wednesday trough from low located on a line
northeast-southwest over the St. Lawrence River.

By 6:30 p.m. EST Wednesday ridge located on a line north-south
over Lake Huron.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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