The ceremonial first jump will take place at 2 p.m. Friday at the John B. Kelly Pool in Fairmount Park.
This comes as the Philadelphia region is under a Heat Advisory amid record-breaking temperatures.
The city plans to open more than 60 neighborhood pools across Philadelphia throughout the summer.
That will be on a rolling basis.
All pools will offer free swim lessons for children.
To find a pool near you, visit the Philadelphia Parks & Recreation's website.