Snorkeling and Scuba Adventures in Sian Ka’an and the Riviera Maya

Slip beneath the turquoise surface of Mexico’s Caribbean and you enter a kaleidoscope of life. Just offshore from Casa Nalum, guided reef dives explore the Mesoamerican Barrier Reef—the world’s second-largest—where corals shelter angelfish, eagle rays and hundreds of more species.

Prefer to stay closer to the sun? Our in house equipment is available to you. Drift above waving sea fans while resident green and loggerhead turtles glide by during the months of May to August; a quick hop north delivers bucket-list Tulum snorkeling with turtles at Akumal Bay.

Certified divers can venture deeper on dramatic wall sites such as Mama Viña or the famed Cenote Dos Ojos, while beginners ease in with shallow Tulum scuba diving lessons in crystalline water. 

Because Sian Ka’an remains a protected biosphere, boat quotas are low and marine encounters feel intimate. Casa Nalum’s concierge secures vetted operators, ensuring small groups, and bilingual guides who share Maya reef lore alongside safety briefings. Whether you’re logging a first bubble or your fiftieth, these waters deliver postcard-perfect clarity and wildlife moments.