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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 17 January 2026

Today Tonight and Sunday.

Gale warning in effect.

Wind southwest 20 knots increasing to southwest 35 this evening then diminishing to southwest 25 Sunday morning.

Scattered flurries ending this evening. Scattered flurries overnight and Sunday.

Freezing spray warning in effect.

Freezing spray beginning near midnight and ending early Sunday evening. Risk of freezing spray Sunday late in the day.

Waves

Issued 03:00 AM EST 17 January 2026
Today Tonight and Sunday. Waves 1 to 1.5 metres building to 2 early this evening and to 3 near midnight. Waves subsiding to 2 near noon Sunday and to 1 to 1.5 Sunday evening.

Extended Forecast

Issued 03:00 AM EST 17 January 2026
Monday Wind southwest 20 knots increasing to southwest 35 in the afternoon.
Tuesday Wind southwest 30 knots.
Wednesday Wind southwest 25 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)

Gale warning in effect

Western Lake Ontario

Issued 03:00 AM EST 17 January 2026

'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.

Freezing spray warning in effect

Western Lake Ontario

Issued 03:00 AM EST 17 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 3:00 AM EST 17 January 2026 Today Tonight and Sunday At 3:00 a.m. EST today departing ridge located on a line
northwest-southeast over central Quebec.

At 3:00 a.m. EST today low 1000 mb located over eastern Upper
Michigan.
By 3:00 a.m. EST Sunday departing low 1007 mb located over central
Quebec.

At 3:00 a.m. EST today ridge located on a line north-south over
Saskatchewan.
By 3:00 a.m. EST Sunday ridge located on a line northeast-southwest
over northern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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