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Eastern Lake Ontario

Forecast

Marine Forecast

Issued 06:30 PM EST 14 November 2025

Tonight and Saturday.

Strong wind warning in effect.

Wind northwest 15 knots diminishing to northeast 10 this evening then increasing to southeast 15 early Saturday morning. Wind increasing to south 20 Saturday afternoon then veering to west 25 Saturday evening.

Showers and mist Saturday late in the day with a risk of thunderstorms. Visibility 1 mile or less in mist.

Waves

Issued 06:30 PM EST 14 November 2025
Tonight and Saturday. Waves 0.5 to 1 metre subsiding to 0.5 or less near midnight then building to 0.5 to 1 Saturday morning. Waves building to 1 to 1.5 Saturday evening.

Extended Forecast

Issued 06:30 PM EST 14 November 2025
Sunday Wind west 35 knots diminishing to northwest 25 in the afternoon.
Monday Wind northwest 25 knots.
Tuesday Wind northwest 15 knots diminishing to 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)

Strong wind warning in effect

Eastern Lake Ontario

Issued 6:30 PM EST 14 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 6:30 PM EST 14 November 2025 Tonight and Saturday At 6:30 p.m. EST tonight ridge located on a line north-south over
Lake Ontario.
By 6:30 p.m. EST Saturday ridge located on a line north-south over
central Quebec.

At 6:30 p.m. EST tonight warm front located on a line north-south
over northern Ontario.
By 6:30 p.m. EST Saturday warm front located on a line north-south
over eastern Ontario.

Great Lakes - Lake Huron Area

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