Nusa Penida offers some of best diving to be found anywhere. Most of the dive sites around Nusa Penida and its two small sister islands – Nusa Lembongan and Nusa Ceningan will be a drift dive. Upwelling from the deep water south of Bali, keep the visibility in these areas clear, but can also form thermo clines with temperatures dropping down to 22.
Pelagic are the main attraction here and you have a good chance to see jacks, mackerel, tuna, turtle, and mantas. Sharks are common and big mantas are frequently sighted. Perhaps the most unusual pelagic visitor to Nusa Penida ( August – September ) is the unique mola-mola or oceanic sunfish, a mysterious large flattened fish with elongated dorsal and vertal fins and a lumpy growth instead of a tail fin.
The most common dive sites are : SD, Ped, Buyuk, Toya pakeh, Crystal bay, Manta point, Mangrove point at Lembongan. Hard to say which dive site is the best. They all offer their unique and their own characteristic as a dive site.