Diving atKoh Chan (Thailand)
Resting beneath the waters of the Mu Koh Chang Marine National Park, the HTMS Chang offers a compelling dive narrative. This site features Thailand's largest shipwreck, a formidable structure that has become an artificial reef. It attracts divers keen to explore its history and the diverse ecosystem now calling it home, providing a rich experience for those venturing into its depths.
As evening covers Koh Chan, the local air temperature is measured at 29.5°C. The current wave height at the surface is recorded at 0.3 m. These late-day readings characterize the surface conditions for the night.
Dive Site Location & Key Facts
Everything you need to know about this dive site.
Dive Site Overview
Diving around Koh Chang, an established scene within the Mu Koh Chang Marine National Park, has evolved significantly since dive operations began here over two decades ago. This area provides a range of underwater experiences, from vibrant coral reefs to the prominent HTMS Chang shipwreck.
It caters to divers of all certification levels, drawing visitors with its accessible sites and rich marine life. Depths typically span 8 to 30 meters (26 to 100 ft), allowing for extensive exploration of various rocky formations like Hin Luk Bat and Hin Rap. Dive times usually last around an hour, allowing ample opportunity to observe the diverse ecosystems that thrive in these waters.
The island's underwater world truly offers something for everyone, whether exploring colorful reef structures or navigating the deeper sections of the wreck.
Koh Chan
Conditions are Moderate
Best Dive Window
Optimal conditions expected
Current conditions near Koh Chan show 30° air, 31° sea temperature, 0.7 m waves, and 33 km/h wind. Forecast data is refreshed regularly to ensure accuracy.
Best Time to Dive
For optimal diving conditions, the period from November through May presents Koh Chang at its finest. During these months, the seas are notably calmest, and underwater visibility is typically very good, often exceeding 10 meters (33 ft). Air temperatures remain comfortably warm, averaging around 26.5°C (80°F) in January and rising to about 29.5°C (85°F) by April. Rainfall is minimal during this peak season; for instance, November records only about 2 mm (0.08 inches) and January even less at 0.25 mm (0.01 inches), ensuring consistent clear skies and pleasant topside weather. These consistent, favorable conditions contribute to excellent dive scores, particularly from January to February. Conversely, the transition months leading into the wetter season, such as June and July, see higher wave activity and increased precipitation, which can affect overall dive scores and underwater clarity. Planning a visit within the November-May window maximizes the chances for superb underwater experiences.
PEAK SEASON SCORE
Scores combine air & water temps, waves, wind & rainfall for overall conditions.
BEST MONTHS TO DIVE
Monthly records compiled from satellite and marine observation nodes over the last 3 years. Data provided by Open-Meteo and MET Norway.
Dive Experience & Conditions
Entering the water at Koh Chang often reveals a welcoming environment for divers. The absence of strong currents and extreme depths makes it an ideal location for individuals looking to learn scuba diving or refresh their skills. Visibility typically ranges from good to excellent, frequently surpassing 10 meters (33 ft), providing clear views of the vibrant reef ecosystems and the HTMS Chang wreck. Dive sites are easily accessible by boat, with popular locations like Hin Luk Bat and Koh Rang Marine Park providing varied underwater topography. Shallow sections of the reef begin at around 8 meters, while deeper areas extend to the recreational limit. Water temperatures are not consistently reported but generally remain warm, suiting a standard 3mm wetsuit or shorty.
Dive Difficulty & Safety Guidelines
Approaching diving in Koh Chang demands adherence to established safety protocols and reliance on local expertise. Dive centers prioritize professionalism, often operating with experienced SDI, TDI, and PADI instructors who have extensive knowledge of the local waters. Dives are typically conducted in small groups, ensuring personalized guidance and attentive supervision for all participants. With over 18 years of diving experience in Koh Chang and thousands of logged dives among leading local professionals, safety standards are high. Divers are encouraged to choose reputable operators, ensure their equipment is well-maintained, and follow all pre-dive briefings diligently. The calm conditions frequently encountered here also contribute to a safer learning and recreational environment.
Recommended Equipment
- Dive Computer
This gear list is based on verified equipment signals for Koh Chan, Thailand. Always confirm final gear choices with your dive operator, guide, or liveaboard.
Recommended Dive Suit
Forecast conditions over the next few days suggest temperatures will remain relatively stable.
Divers who prefer a balanced level of warmth often select dive skin or rash guard in water temperatures like this. A hood or vest is suggested for sensitive divers due to surface winds.
Recent environmental data from Koh Chan indicates water temperatures near 31°C (87°F). Surface air temperatures are resting at 30°C (85°F).
Due to technical issues with our weather providers, live updates are temporarily delayed. The data above reflects the conditions at the time of the last successful fetch.
Emergency & Medical Support
Essential information to help you plan your dive trip to Koh Chan.
Hyperbaric chambers are a critical part of dive safety infrastructure. Availability varies significantly by region, and not all dive areas have immediate access.
Before diving, it's recommended to:
- confirm nearest medical facilities
- check emergency procedures with local dive operators
- ensure dive insurance covers evacuation if required
Divers Alert Network
Diving emergency assistance available through DAN World.
+1-919-684-9111- 24/7 emergency hotline
- Diving medical assistance
- Evacuation coordination
Emergency contacts are provided for reference. Always verify local emergency services before diving.
Marine Life at Koh Chan
Beneath the surface, Koh Chang's underwater landscape thrives with a diversity of marine species and vibrant coral formations. Exploring the various reef structures, divers encounter dense patches of Staghorn, Christmas Tree, Table, and Soft corals, alongside delicate Gorgonian Fans. These habitats support abundant fish life, frequently seen in large schools, including Moray Eels, Groupers, Triggerfish, and Barracuda. Shallower areas often reveal playful Clownfish and Porcupinefish. Additionally, keen eyes might spot Nudibranches, Sponges, and even Sea Turtles gracefully gliding by. While rare, the occasional Whale Shark sighting offers a truly unforgettable encounter.
Dive Sites Near Koh Chan
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Dive Centers Near Koh Chan
Working Hours
Today: 09:00 - 21:00
Dive Station Pattaya
Nearest Airports
Nearest airports to help plan travel to this dive area.
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Search Flights on ExpediaFrequently Asked Questions
What is the main dive attraction in Koh Chang?
The principal draw is often the HTMS Chang, Thailand's largest shipwreck. It provides an impressive artificial reef for wreck, deep, and advanced training dives, hosting a wide array of marine life.
Is Koh Chang suitable for beginner divers?
Yes, Koh Chang is an excellent place to learn or refresh diving skills. It benefits from calm seas, a lack of strong currents, and accessible depths, making for a comfortable and safe learning environment.
What are the typical diving depths around Koh Chang?
Dive sites in Koh Chang generally range from 8 to 30 meters (26 to 100 ft). This range accommodates both recreational divers exploring shallower coral gardens and those undertaking deeper wreck explorations.
When is the best time of year to dive in Koh Chang?
The prime diving season runs from November through May. During these months, the seas are calmest, visibility is typically at its best, and the weather is generally dry with comfortable air temperatures.
Can I get scuba certified in Koh Chang?
Absolutely. Multiple PADI, SDI, and TDI dive centers offer a full range of courses, from beginner Open Water Diver certifications to professional-level training. Instruction is often available in various languages.
Are there options for non-divers or snorkelers?
Yes, many dive operators also offer snorkeling trips, particularly to sites within the Koh Rang Marine Park. These excursions allow non-divers to enjoy the vibrant shallow reefs and marine life from the surface.
Is Nitrox (enriched air) diving available?
Some dive centers in Koh Chang do offer Nitrox dives, catering to certified enriched air divers. Inquiring with individual dive operators beforehand is recommended to confirm availability and pricing.
Are there any marine park fees?
Yes, there is a marine park tax, especially for visits to the Koh Rang Marine Park. Currently, this fee is 400 Thai Baht for adult divers and 200 Thai Baht for adult snorkelers.
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Koh Chan
Conditions are Moderate
Best Dive Window
Optimal conditions expected
Current conditions near Koh Chan show 30° air, 31° sea temperature, 0.7 m waves, and 33 km/h wind. Forecast data is refreshed regularly to ensure accuracy.