Playas del Coco is the practical dive base for the Gulf of Papagayo in northern Guanacaste. Nearby Ocotal and Hermosa add quieter beach stays, while operators run local reef and rocky-outcrop dives by day boat. Expect schooling fish, rays, eels, occasional whitetip reef sharks and a rewarding search for smaller animals, not guaranteed crystal-clear water. The region's dry season brings sunshine but also Papagayo winds, cooler upwelling and thermoclines. Warmer water often comes in the greener, wetter months. Snorkelers have an actual shore option at Ocotal and can join selected mixed dive/snorkel boats. PADI-listed local operators advertise freediving, although specific coached session dates are unverified. The Bat Islands are a distant, advanced, weather- and permission-dependent excursion, not an everyday beginner dive or separate resort base. The Catalina Islands belong in the separate Flamingo-oriented coverage.