Koh thian - Koh rang national park
Sheltered Koh Rang reef with a rockier, fish-rich side.
Scuba DivingSnorkelingBoatBeginner10m - 16m
Reef
Local operator required
Local dive boats handle the permits, timing, and the short run from Koh Chang.
Day-boat access, park permits, and mostly mild water make this a straightforward Koh Chang outing for beginners and snorkel add-ons.
About Koh thian - Koh rang national park
Koh Thian is a small Koh Rang-area island dive with two distinct faces. The sheltered side is a shallow coral run with easy fish spotting, while the rockier side carries harder coral, boulders, and more of the groupers and school fish that make the park feel alive. Some reef damage is still visible, but it remains a comfortable day-boat dive for newer divers and snorkelers when the water stays calm.
Safety & Access
Site Conditions
Boat trafficRestricted access
Safety Notes
Stay with the easier side if the surface gets busier and keep an eye on boat traffic during day-trip hours.
Access Restrictions
Boat access only. Park permits may be required.
Legal Notes
Mu Ko Chang National Park controls access, and some areas may require permits or seasonal management.
Where Is Koh thian - Koh rang national park?
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Local Intel For Koh thian - Koh rang national park
Community notes to help plan your visit.
Scuba Diving
Shallow coral slope on one side and a rockier banana-shaped route on the other, so you can keep it easy or spend more time hunting for fish in the structure.
Snorkeling
The sheltered side is shallow and calm enough to work well as a snorkel stop, with the coral and fish easiest to read when the water is flat.
Wildlife at Koh thian - Koh rang national park
Species commonly reported at this site, with direct links into their wildlife guides.
Research Estimate At Koh thian - Koh rang national park
Conservative baseline from public research. No community dives logged yet.
Avg. Visibility12m
Access3/5 · Moderate entry effort
Coral3/5 · Mixed health
Aquatic Life4/5 · Great variety
Facilities3/5 · Basic facilities
Crowd / PopularityQuite busy
CurrentLight current
SurgeFlat calm
