Swimming & Pools

Extended Pool Hours During an Extended Heat Warning

Taking a dip in Toronto's pools is a great way to stay cool and be safe during the hot summer months in the city. When an Extended Heat Warning is declared, and when the weather forecast calls for low probability of inclement weather such as heavy rain or lightning, some outdoor and indoor pools may extend their hours until 11:45 pm.

When the extended hour program is in effect at our pools, the Parks, Forestry & Recreation homepage will be updated in the early afternoon on the day of the extended opening. Parks, Forestry & Recreation will also notify Toronto media to help alert the public.

When proper weather conditions are present, below is a list of pools running extended swimming hours during an Extended Heat Warning.

Alex Duff Memorial Pool 779 Crawford St 416 392-0910
Alexandra Park Pool 275 Bathurst St 416 392-7686
Giovanni Caboto Outdoor Pool 1369 St. Clair Ave W 416 392-7762
Monarch Park Outdoor Pool 115 Felstead Ave 416-392-7831
McGregor Park Outdoor Pool 2231 Lawrence Ave E 416 396-7769
Smithfield Outdoor Pool 175 Mount Olive Dr 416 394-8495
Sunnyside - Gus Ryder Outdoor Pool 1755 Lake Shore Blvd W 416 392-7929

What is a Heat Warning?

From May 15 to September 30 of each year, Toronto Public Health staff monitors the Harmonized Heat Warning and Information System to determine when the Medical Officer of Health should declare a Heat or Extended Heat Warning. Using spatial synoptic classification, this system compares forecast data to historical meteorological conditions which have in the past, lead to increased mortality in Toronto.

Forecast data includes weather conditions such as temperature, dew point, humidity, cloud cover, wind speed and direction. The system also considers when in the summer season offensive conditions are present and the number of consecutive days oppressive conditions occurred.

A Heat Warning is issued when an oppressive air mass is forecast and the likelihood of excess weather-related mortality exceeds 65% and an Extended Heat Warning when the likelihood of excess weather related mortality exceeds 90%.

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