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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 09:07 AM EST 18 January 2026

Today Tonight and Monday.

Gale warning in effect.

Wind southwest 25 knots diminishing to southwest 15 this afternoon then increasing to southwest 20 this evening. Wind increasing to southwest 30 near noon Monday and to southwest 35 Monday afternoon.

Flurries this afternoon tonight and Monday. Visibility 1 mile or less in flurries.

Freezing spray warning in effect.

Freezing spray ending near noon. Risk of freezing spray early this afternoon. Risk of freezing spray overnight and Monday. Freezing spray beginning Monday afternoon.

Waves

Issued 03:00 AM EST 18 January 2026
Today Tonight and Monday. Waves 2 to 3 metres subsiding to 1 to 1.5 near noon and to 0.5 to 1 early this evening. Waves building to 1 to 1.5 near midnight and to 2 to 3 Monday afternoon.

Extended Forecast

Issued 03:00 AM EST 18 January 2026
Tuesday Wind southwest 30 knots.
Wednesday Wind southwest 25 knots.
Thursday Wind southwest 30 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 09:07 AM EST 18 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 09:07 AM EST 18 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 18 January 2026 Today Tonight and Monday At 3:00 a.m. EST today departing low 1007 mb located over central
Quebec.

At 3:00 a.m. EST today ridge located on a line northeast-southwest
over northwestern Ontario.
By 3:00 a.m. EST Monday ridge located on a line northeast-southwest
over New York State.

At 3:00 a.m. EST today low 1011 mb located over southern Manitoba.
By 3:00 a.m. EST Monday low 999 mb located over Lake Huron.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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