Club Natació Atlètic-Barceloneta

• Four pools by the sea, two indoor and two outdoor, one heated and open year-round, plus a shallow recreational pool for kids
• Day pass, subject to space: no membership needed for a swim, but passes sell only up to the pool's capacity and can't be booked ahead, so come early and pick a weekday in summer
• Swim courses from babies up for members, parent-and-baby from 4 months, learn-to-swim from age 2, then competitive swim and water polo squads

A century-old swim club on Sant Sebastià beach with direct access to the sand and four pools, two indoor and two outdoor, one heated and open all year, plus a dedicated learn-to-swim pool and a shallow recreational pool for kids. You may also see the pools listed as Piscina Sant Sebastià, it is the same place. Day passes at the door let non-members swim, and courses run from parent-and-baby water classes through to competitive swimming and water polo squads. There are also padel courts, a gym, a spa, a poolside restaurant and a summer sports camp.