Enjoy a morning of Stand-up paddling in ‘Laguna de Condado’ (less than 10 min in Uber), where you can try some Stand-Up Paddle or Kayaking. Rent a board for $20/hour. Take a Surf class in La Punta.
Snorkel in El Escambrón
Easily the most scenic of San Juan’s coastlines, the Balneario El Escambrón has three beaches with calm, relaxing waters, a park on its outskirts, and is surrounded by Old San Juan. It’s ideal for laid-back sunbathing; quiet, leisurely soaking; and snorkeling — particularly at Playa 9, where fish gather around concrete boulders. Guided scuba dives are available; check local companies (Scuba Dogs is one) for tour info.
BTW: For snorkeling, bring gear. There are no on-site shops.
These islands can be visited on a day excursion or chartered boat.