

Best for intermediate divers, 5-30m, boat entry, mild current.
Three Sisters consists of three distinct underwater pinnacles and reef structures located in the Surin Islands. The site offers depths ranging from 5 to 30 metres, with an average depth of 18 metres. Divers encounter visibility between 10 and 30 metres. Access is by boat only, and the site is suited for intermediate divers due to the presence of swim-throughs, potential surge, and currents that can strengthen around the pinnacles. Divers should monitor air consumption closely in the deeper sections and remain near their guide. Water temperatures typically range from 26 to 30 degrees Celsius, though occasional thermoclines may occur.
10.12105, 97.95387
Current patterns can shift around the pinnacles without much warning, so position yourself on the sheltered side when you need a rest. Confirm current conditions with your dive operator before descending, as the deeper sections demand careful air management.
Accessible via liveaboard dive tours departing from Ranong, Thailand.
Recorded at this site
Depth
5-30m
Visibility
10-30m
Skill Level
Intermediate
Entry
Boat
Boat required
Water Temp
26-30°C
Current
Mild
Typical Dive
50 min
The site ranges from 5 to 30 metres deep, with an average depth of 18 metres.
No, this site is intended for intermediate divers due to the depth, potential surge, and swim-through sections.
Three Sisters is a boat-only dive site.
Visibility ranges from 10 to 30 metres, and currents are generally mild but can strengthen around the pinnacles.
Hazards include deep sections, swim-throughs, surge, and currents that can shift quickly. Maintain calm movements if sharks are present.
Diving at Three Sisters in Ranong requires the following certifications: Open Water, Advanced. Always dive within your training limits.
A rashguard or 2mm shorty is recommended for diving at Three Sisters in Ranong. Water temperatures range from 26°C to 30°C.