PEIRCE ISLAND OUTDOOR POOL OPENING MONDAY JUNE 27, 2016 Outdoor Pool Information Summer 2016 Outdoor Pool Schedule Lesson Schedule 2016 Session 2   Phone: (603) 433-0039 * Email: outdoorpool@cityofportsmouth.com Originally built in 1937 and fully refurbished in 2003, the Peirce Island Pool is the perfect place to spend a hot, sunny summer afternoon. With a length of 100 yards, a width of 33 yards and a gently sloping depth from 18 inches to six feet, it provides space for every age and ability.