The Bida Islands sit in the Andaman Sea south of the Phi Phi Islands and are reached by day boat from Koh Phi Phi, Koh Lanta, or Phuket. The five sites span reef walls, limestone cave and cavern formations, and open pinnacles, with depths ranging from very shallow to thirty metres. Conditions suit beginners and intermediate divers, with generally mild currents and visibility that can reach thirty metres on a good day. Recorded species include whale sharks, giant moray eels, pharaoh cuttlefish, sea kraits, peacock mantis shrimp, porcupinefish, and nudibranchs. The best conditions broadly align with the Andaman Sea dry season from November to May.





Monthly water temperature across Bida Islands's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperature remains warm year-round, peaking in late spring. Conditions are generally at their best from November to May in line with the Andaman Sea dry season, with visibility reaching its clearest during this period.
7 operators
Saladan, Thailand
Saladan, Thailand
Saladan, Thailand
Saladan, Thailand
Water temperature around Bida Islands ranges from about 29°C in January to 31°C in April, based on satellite sea-temperature data for its dive sites.
With water around 29–31°C, a rash guard or 3mm shorty works in Bida Islands year-round.
Fin maps 5 sites in Bida Islands (5 scuba diving sites and 3 snorkelling spots, with some suited to both).
3 more sites to explore