Dive Spot Guide•
Koh thian - Koh rang national park
Sheltered Koh Rang reef with a rockier, fish-rich side.
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.
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Research Estimate At Koh thian - Koh rang national park
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 12m
AccessModerate entry effort
CoralMixed health
Aquatic LifeGreat variety
FacilitiesBasic facilities
Crowd / PopularityQuite busy
CurrentLight current
SurgeFlat calm
Where Is Koh thian - Koh rang national park?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Koh thian - Koh rang national park Planning Details
Depth range, seasonality, and planning context.
Reported Depth
10m - 16m
Depth Note
Banana-shaped boat dive with a shallow coral side and a rockier side inside easy recreational depth.
Best Season
November to April.
Typical Conditions
Shallow coral on one side and a rockier, fishier side on the other, usually calm enough for beginner or snorkel-friendly outings.
Safety & Access At Koh thian - Koh rang national park
Hazards, restrictions, and access requirements.
Key Hazards
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.
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.
Recent Logged Visits At Koh thian - Koh rang national park
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Koh thian - Koh rang national park
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility12m
Activity
No dive activity logged yet.
