

Best for beginner divers, 5-11m, boat entry, mild current.
Koh Thonglang is a boat-access reef dive located in the Koh Ngam Islands. The site features depths ranging from 5 to 11 metres, with an average depth of 8 metres, making it suitable for beginner divers. Underwater conditions are generally mild with visibility varying between 5 and 20 metres. The reef structure supports a variety of hard and soft corals, alongside reef fish and invertebrates typical of the region. Divers should maintain good buoyancy control to avoid contact with sharp coral and rocks. Due to boat traffic in the area, always deploy a surface marker buoy before ascending and wait for the boat's signal before surfacing.
10.19590, 99.22080
Visibility at this site can vary considerably, so ask your dive operator about recent conditions before heading out. Because boat traffic operates in the area, always surface with your safety sausage deployed and stay close to your guide when ascending.
Access info coming soon
Recorded at this site
Depth
5-11m
Visibility
5-20m
Skill Level
Beginner
Entry
Boat
Boat required
Water Temp
28-31°C
Current
Mild
Best Time
Mar, Apr, May, Jun, Jul, Aug, Sep
The reef supports a variety of reef fish and invertebrates, including parrotfish, damselfish, anemonefish, and crustaceans found within the reef structure.
Yes, the site is suitable for beginner divers due to the shallow depths and generally mild currents.
The site ranges from 5 to 11 metres in depth, with an average depth of 8 metres.
Koh Thonglang is a boat-access site; a boat is required to reach the reef.
While the site is primarily a dive location, the shallow reef structure may be accessible for snorkelling depending on boat operator policies.
Diving at Koh Thonglang in Chumphon requires the following certifications: Open Water. Always dive within your training limits.
A rashguard or 2mm shorty is recommended for diving at Koh Thonglang in Chumphon. Water temperatures range from 28°C to 31°C.
The best months to visit Koh Thonglang in Chumphon are March, April, May, June, July, August, and September. Conditions outside these months can still be good but are less predictable.
Koh Thonglang in Chumphon typically has mild currents that most divers can handle comfortably.
Visibility at Koh Thonglang in Chumphon typically ranges from 5 metres to 20 metres. Conditions vary with weather, tides, and seasons.