San Pedro Island, located off San Carlos, offers a combination of reef and cave diving. The site features depths ranging from 8 to 30 metres, with an average of 15 metres. Divers encounter overhead environments, including caves and swim-throughs, which require precise buoyancy control and appropriate training. Visibility typically spans 10 to 20 metres, and currents remain mild. Water temperatures fluctuate significantly, from 18C in winter to 28C in late summer. Night diving is available, providing a different perspective of the reef structure. Due to the overhead environments, carrying primary and backup torches is essential for all dives.

Lighthouse Cove at Isla San Pedro Nalasco is a shallow reef site suitable for beginners. Divers typically experience a depth of approximately 7 metres during 45-minute dives. Access to this location is exclusively by boat. Conditions at the site are variable, with mild currents and potential for low visibility. Divers should be aware of hazards including jellyfish, sharp coral, and stonefish. Water temperatures fluctuate significantly throughout the year, ranging from 18C in February to 30C in August and September.

San Pedro - La Playa is a shallow reef site located at Isla San Pedro Nalasco, offering depths between 1 and 2 metres. This site is suitable for beginners due to the mild currents and visibility ranging from 10 to 30 metres. Access is by boat only, and divers should exercise caution regarding sharp coral and rocks when entering the water. Water temperatures fluctuate between 18C and 30C throughout the year. Night diving is available at this location. Species recorded around this area include California sea lions, king angelfish, Cortez angelfish, Panamic green moray, wrasses, barberfish, Moorish idols, triggerfish, common dolphinfish, groupers, rock cod, round stingrays, scorpionfish, and sea stars.

Lighthouse South is a reef site located off Isla San Pedro Nalasco, Mexico. The site features depths ranging from 8 to 15 metres, with an average depth of 12 metres. Conditions are generally manageable with mild currents and visibility typically between 10 and 20 metres. Access is by boat only, and divers should remain vigilant for boat traffic during surface intervals and ascents. Divers must exercise caution near the seabed to avoid contact with sharp coral and rocks. The site is suitable for beginner divers, with a typical dive duration of 45 minutes.

The Rookery is a shallow reef site located off Isla San Pedro Nalasco, offering a relaxed environment suitable for beginner divers. The site sits at an average depth of 2 metres, with a maximum depth of 3 metres. Access is by boat only, requiring a charter from San Carlos. Conditions are generally manageable with mild currents and visibility ranging from 10 to 30 metres. Divers should be aware of an entanglement risk associated with the reef structure and nearby mooring gear. Maintaining awareness of equipment and surroundings is essential throughout the dive. Water temperatures fluctuate significantly throughout the year, ranging from 18 to 30 degrees Celsius.

La Ventana is a diverse dive site located at Isla San Pedro Nalasco, featuring a combination of natural reef, cave sections, and an artificial reef structure. Divers can explore depths ranging from 3 to 30 metres with visibility typically between 10 and 25 metres. The site experiences mild currents, making it suitable for various skill levels. Access is available via both shore and boat. On-site facilities include parking, toilets, showers, changing rooms, and a rinse station. Night diving is permitted at this location. Divers should note that an advanced certification is required in addition to open water certification.

La Cueva at Isla San Pedro Nalasco offers a diverse underwater environment featuring a cave system, natural reef, and artificial reef structures. The site ranges in depth from 2 to 30 metres, with an average depth of 15 metres. Divers experience mild currents and visibility between 10 and 20 metres. Due to the presence of sharp coral and rock edges, precise buoyancy control is required. Access is exclusively by boat, and the site is suited for intermediate divers comfortable with overhead environments. Water temperatures fluctuate significantly throughout the year, ranging from 18 to 28 degrees Celsius, necessitating appropriate thermal protection.

La Roca Grande is a reef site located at Isla San Pedro Nalasco, Mexico, accessible only by boat. The site features depths ranging from 8 to 19 metres with an average of 18 metres. Divers and snorkellers encounter mild currents, though visibility varies significantly depending on local conditions. The reef structure supports a variety of marine life, including guitar fish, rays, blennies, damsel fish, butterfly fish, angel fish, parrot fish, and puffer fish. Sea lions are also known to interact with divers in the water. The site is suitable for beginners and supports night diving, offering a different perspective on the reef environment throughout the year.