Koror Reefs and Caves centres on the Rock Islands, where cave systems, vertical walls, drift dives and wrecks sit within a short boat ride of each other. Chandelier Cave and Mysterious Cave draw divers into multi-chambered passages, while sites like Lighthouse Channel and Short Dropoff deliver deep wall dives with current. Shallower reefs suit beginners, and the species list is broad: Mandarinfish, Napoleon Wrasse, Harlequin Sweetlips and Giant Moray are among the consistently recorded highlights. Warm water holds steady across the year.
Monthly water temperature across Koror Reefs & Caves'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 the coolest readings arriving in February and the warmest sustained from late spring through to year end. Best-month data points to February through April as a peak window, with November to January also rated well. Divers visiting outside peak months will still find warm conditions, though planning around these periods may improve overall visibility and reef activity.
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11 more sites to explore
Water temperature around Koror Reefs & Caves ranges from about 28°C in February to 30°C in May, based on satellite sea-temperature data for its dive sites.
With water around 28–30°C, a rash guard or 3mm shorty works in Koror Reefs & Caves year-round.
Fin maps 23 sites in Koror Reefs & Caves (22 scuba diving sites and 4 snorkelling spots, with some suited to both).
Across Koror Reefs & Caves's dive sites, January, February, March, April, November and December are most often reported as the best months to visit.
The region has a rich and well-documented species list. Harlequin Sweetlips, Elongate Clam and Wrasses are among the most frequently recorded, while Mandarinfish, Napoleon Wrasse, Regal Angelfish and Giant Moray are signature sightings. Banded Pipefish and Day Octopus reward slower, more methodical dives on reef and muck sites.
A good proportion of sites are rated for beginners. Shallow reefs such as Ngargol Island, Soft Coral Arch and Malakal Harbor Reef offer gentle conditions, and cave sites like Chandelier Cave and Mysterious Cave are also listed at beginner level. Intermediate and advanced sites such as Lighthouse Channel and West Passage are better left until divers are comfortable with drift diving and deeper walls.
Nearly all sites in the region are reached by boat, which is typical given the Rock Islands setting. A small number of sites, including Arakababesang Island and Sam's Restaurant Wall, offer shore entry as an alternative. Boat access opens up the full spread of caves, wrecks and walls across the area.
The region spans a wide range of site types. Cave and cavern dives at Chandelier Cave and Mysterious Cave are a distinctive feature. Wrecks including Sata, Helmet and Hafa Dai add a different character, while wall and drift sites like Lighthouse Channel and Devil Fish City bring current-driven experiences. Shallow reefs complete the mix, giving the region real variety across skill levels.
