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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EST 20 January 2026

Tonight and Wednesday.

Wind west 30 knots backing to southwest 25 late overnight then to south 20 Wednesday morning. Wind increasing to south 25 Wednesday evening.

Flurries changing to snow near noon Wednesday. Visibility 1 mile or less in precipitation.

Freezing spray warning in effect.

Freezing spray ending near noon Wednesday. Risk of freezing spray Wednesday afternoon.

Waves

Issued 06:30 PM EST 20 January 2026
Tonight and Wednesday. Waves 3 metres subsiding to 2 early Wednesday morning and to 1 to 1.5 near noon Wednesday.

Extended Forecast

Issued 06:30 PM EST 20 January 2026
Thursday Wind southwest 30 knots.
Friday Wind west 30 knots.
Saturday Wind northwest 20 knots.

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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)

Freezing spray warning in effect

Eastern Lake Ontario

Issued 6:30 PM EST 20 January 2026

Moderate or severe freezing spray is 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 20 January 2026 Tonight and Wednesday At 6:30 p.m. EST tonight departing ridge located from Kentucky to
New York State.

At 6:30 p.m. EST tonight departing trough located on a line
northeast-southwest over northeastern Ontario.

At 6:30 p.m. EST tonight low 1001 mb located over northern Manitoba.
By 6:30 p.m. EST Wednesday low 1005 mb located over Lake Superior.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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