Una Una is a volcanic island within the Togian Islands whose dive sites reward patience and close observation. Reef and wall topography, including a deep pinnacle that drops well beyond recreational limits, frames an exceptional critter list: the Mimic Octopus is the signature find, while Flamboyant Cuttlefish, Frogfish, Wunderpus, Ambon Scorpionfish, and Harlequin Shrimp reward divers who slow down and look carefully. Green Sea Turtle and Hawksbill Sea Turtle are sighted regularly, and Eagle Ray appears at the deeper sites.
Monthly water temperature across Una Una's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperature stays warm throughout the year with very little variation, making thermal comfort a constant rather than a seasonal consideration. April peaks slightly in diver preference, with March, November, and December also rated highly, suggesting these months offer the most settled conditions. The deep pinnacle and wall sites are best suited to advanced divers comfortable managing depth and any current.
Water temperature around Una Una ranges from about 28°C in April to 30°C in January, based on satellite sea-temperature data for its dive sites.
10 more sites to explore
With water around 28–30°C, a rash guard or 3mm shorty works in Una Una year-round.
Fin maps 11 sites in Una Una (11 scuba diving sites and 1 snorkelling spots, with some suited to both).
Una Una has a strong reputation for macro and cryptic species. The Mimic Octopus is the site's signature animal, observed across many of the local dives. Other confirmed sightings include Flamboyant Cuttlefish, Wunderpus, Frogfish, Ambon Scorpionfish, Harlequin Shrimp, Seahorse, Spotted Wobbegong, and Stonefish, making thorough, unhurried diving the most rewarding approach.
The available site data points predominantly toward advanced-level diving. The Pinnacle, the most detailed site in the area, involves deep wall and reef topography that demands solid buoyancy control and depth awareness. Divers new to the sport would benefit from building experience before attempting the deeper sites here.
All listed sites are accessed by boat. Two operators serve the area: Candidasa Bali Dive and Sanctum Una Una. Booking through one of these operators is the practical way to reach the dive sites, as shore entry options are not featured in the current site listings.
The sites combine reef, wall, and pinnacle formations. The Pinnacle is the standout structural feature, a submerged formation with upper reef giving way to a deep wall. This mix of topography supports both the larger pelagic visitors such as Eagle Ray and Barracuda and the cryptic species that hide within the reef structure.
