8 Best Koh Chang Diving Sites by Level and Season

Featured image: Vyacheslav Argenberg, CC BY 4.0, via Wikimedia Commons.

Koh Chang Diving at a Glance

Expect small-group boat days rather than shore dives. Most trips combine two or more dives, with a surface interval on deck between them. Wrecks, coral walls and pinnacles are the three site types. Depths range from shallow reef gardens to roughly 40 m on the deepest wreck, which only suits advanced or technical divers. Gulf reefs offer lower visibility than the Andaman Sea, so manage expectations before you book.

• Best for: certified divers, first-time Try Dive guests, and wreck-curious Advanced divers.
• Skip if: you want big-animal trips, Andaman-style clarity, or you cannot swim comfortably.
• Trip format: guided boat day trips, small groups, snorkelers welcome on some departures.
• Depth range: shallow reefs to about 40 m on the deepest wreck.

8 Best Koh Chang Diving Sites

Depths below are operator-reported and were checked in November 2026. Ask your dive center for the day's site plan, since boats choose sites by conditions and group level.

1. HTMS Chang Wreck

HTMS Chang is the headline wreck of the park and the reason many divers book here. You can explore its cargo holds and watch reef life settle on the hull. Wreck diving courses run locally, so this is a natural target if you want a specialty. Full planning detail lives in our wreck diving guide.

Ask the operator about depth limits before you commit, because qualification rules vary by center. Skip it if you are fresh from an Open Water course and have no wreck or deep training.

2. Hin Luk Bat

Hin Luk Bat is a coral-wall reef with anemone fields and clownfish. It rewards slow, shallow-biased swimming. Beginners and intermediates both fit here, which makes it the easiest reef recommendation in the park. Our Hin Luk Bat dive guide covers the layout.

Go on a morning departure if you want calmer water for photography. Skip it if you are chasing wrecks or deep pinnacles.

3. Koh Rang Pinnacle

Koh Rang Pinnacle is a deep dive that reaches about 30 m. Operators report eagle rays, giant trevallies and coral gardens. It is a day for Advanced or deep-qualified divers who track air and no-stop time carefully.

Boats run out to the Koh Rang area, so the trip takes longer than inner-reef sites. See our Koh Rang guide for the wider island. Skip it if you dislike open-water ascents or current.

4. Hin Rua Tek

Hin Rua Tek is a coral wall cut with crevices. Operators list reef sharks, stingrays and barracuda here. Swim along the wall at a steady pace and look into the crevices without touching the coral.

Open Water divers can usually manage a wall dive when depth is kept moderate, but ask your guide for the day's plan. Skip it if you want a single compact reef with nothing to navigate.

5. Hin Raab North

Hin Raab North pairs coral canyons with reef-shark sightings, according to local operators. Canyons make it a good site for buoyancy-confident divers who like terrain more than open water.

Pair it with Hin Raab South on the same day if your boat schedule allows. Skip it if your buoyancy is still unsteady, since tight canyons punish heavy fins.

6. Hin Sam Sao

Hin Sam Sao is a shallow reef of coral gardens, stingrays and moray eels. Shallow water means long bottom times. It works well for Discover Scuba guests and new Open Water divers because depth stays modest.

Snorkelers on the same boat can often enjoy the upper reef too. Skip it if you want dramatic walls or deep pinnacles.

7. T11 Wreck

T11 is a small patrol boat resting around 18 m. Operators recommend it as a first wreck. You get a clear lesson in wreck etiquette and swim-through awareness without full-scale penetration risk.

Fish gather around the structure, so bring a patient eye rather than a camera rush. Skip it if you only want reef scenery.

8. Blueberry Hill

Blueberry Hill combines coral canyons, pinnacles and tropical reef fish in one dive. It suits divers who want variety in a single plan, from sheltered corners to open pinnacle edges.

Ask your guide about current at the pinnacle tops before you descend. Skip it if you prefer a simple, flat reef with minimal navigation.

Which Dive Sites Fit Your Certification Level

Match depth to training. Operators place T11 near 18 m and Koh Rang Pinnacle near 30 m. The Phutthayotfa Chulalok frigate wreck, about 134 m long, sits near 40 m and is billed for advanced and technical divers. Your dive center sets final limits, so share your logbook when you book.

Best Time to Dive Koh Chang

Season changes sea state and visibility, and monsoon months affect which sites boats can reach. Read our Koh Chang diving season guide for the month-level picture, and check the Thai Meteorological Department before you fly.

Costs and What Affects Them

Prices change by operator and season, so no single figure is reliable here. Check each dive center's current price list for fun dives, courses, gear rental and park fees.

How to Get There and Where to Stay

Trat is the usual mainland gateway, and boats run from the Koh Chang area into the marine park. Ask your operator which pier and base area suit their departure, and check the transport operator's current timetable.

Courses vs Fun Dives vs Try Dives

Pick by experience. A Try Dive is a supervised introduction with no certification. Fun dives are for certified divers who want sites. Courses take several days and build the Open Water or Advanced rating that unlocks deeper sites. The PADI course overview outlines the training ladder. Allow extra days if you plan to dive, because courses leave little room for sightseeing.

Safety, Insurance and Flying After Diving

Complete the medical self-declaration honestly. Carry dive insurance that covers hyperbaric treatment. Follow your dive computer and training agency on no-fly intervals before departure flights. Choose an operator with current instructor credentials, small groups and clear briefings, and skip a dive if you feel unwell.

Is Koh Chang Right for You? Nearby Alternatives

Koh Chang suits wreck and reef variety close to one base. If you want a quieter island trip, compare it with Koh Kood Diving: Sites, Season & Courses Guide. Non-divers can stay on the surface with Koh Chang Snorkeling: Best Spots, Tours and Season Guide. Other snorkel options include Koh Kood Snorkeling: Best Spots, Trips & Costs, Koh Mak Snorkeling: Best Spots, Boat Trips and Costs and Koh Wai Snorkeling Guide: Beaches, Tours & Day Trip vs Stay. Skip the Gulf entirely if big animals or Andaman-style visibility top your list.