Coral Triangle, Southeast Asia

Diving in Indonesia

Indonesia sits at the heart of the Coral Triangle, the global epicentre of marine biodiversity, and its diving ranges from muck-diving critter sites to big-animal drift dives. Nusa Penida and Komodo National Park are two of the best-documented reef manta habitats anywhere, each protected as a marine area with its own access rules and seasonal pattern. Nusa Penida doubles as the world's most accessible place to meet a sunfish.

What you can see

Know before you go

Best season

November to June for mantas in both regions. July to October for sunfish at Nusa Penida — the same cold upwelling that brings them up makes the diving colder and more demanding.

Conditions

Nusa Penida runs 26–29°C in the warm season (Nov–May) but drops to 18–25°C in the cold season (Jun–Oct), with sharp thermoclines that can swing 10°C inside a single dive — a 5mm suit or hooded vest is wise outside the warm months. Komodo's central zone is a steadier 27–29°C.

Getting there

Bali's Ngurah Rai International Airport (Denpasar) serves Nusa Penida via a 30–45 minute fast boat from Sanur. Komodo National Park is reached through Labuan Bajo on Flores, from where day boats run to Karang Makassar and liveaboards head south to Manta Alley.