Koh Mat Wai Noi is a shallow reef site located in the Koh Ngam Islands, Thailand. Suitable for both divers and snorkellers, the site features depths ranging from 2 to 11 metres with an average of 8 metres. Visibility typically spans 10 to 25 metres, and currents remain mild, making it accessible for beginners. Access is by boat only. Hazards include the presence of jellyfish and sharp coral structures, so protective clothing such as a rash vest or thin wetsuit is recommended. Divers and snorkellers should exercise caution when re-entering the boat. Guided tours are available to assist with navigating the reef environment.

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.

Koh Mat Wai Yai is a shallow reef site located 1000 metres from shore within the Koh Ngam Islands. The site features a gentle reef structure with depths typically ranging between 5 and 8 metres, though the area can reach 15 metres. Access is by boat only. Conditions include mild currents, though these can pick up unexpectedly, and visibility is generally around 5 metres. Divers should maintain neutral buoyancy to avoid contact with sharp coral and rocks. The site is suitable for beginners and supports night diving. Due to variable visibility, early morning dives are recommended to avoid sediment stirred up by boat traffic.

Aow Thong Tom is a shallow reef site located at the Koh Ngam Islands, offering a straightforward shore entry for both divers and snorkellers. The site reaches a maximum depth of 7 metres, making it well-suited for beginners. Conditions are generally manageable with mild currents, though visibility can fluctuate without warning. Divers and snorkellers should remain aware of boat traffic in the area and maintain surface visibility at all times. Due to the variable visibility, guided tours are recommended to help navigate the reef and locate specific marine life. Water temperatures remain warm throughout the year, ranging between 28C and 31C.

Thong Tom Beach is an artificial reef located 400 metres offshore in the Koh Ngam Islands. Designed to enhance the seabed, the site features structures resting in shallow water between 5 and 10 metres, with an average depth of 8 metres. It is well-suited for beginner divers. Conditions are generally manageable with mild currents and visibility ranging from 5 to 12 metres. Divers should exercise caution regarding lionfish, which are known to rest motionless against the artificial structures. The site rewards slow, patient exploration, particularly when observing the small crustaceans and juvenile fish that inhabit the reef crevices.

Koh Kula is a shallow reef site located 500 metres from the shore of the Koh Ngam Islands. The site features depths ranging from 2 to 8 metres, with an average depth of 5 metres, making it suitable for beginners. Visibility typically varies between 5 and 15 metres. Access is by boat only, and divers should be aware of boat traffic and the potential for currents to strengthen unexpectedly. Always check conditions with a guide before entering the water and remain close to the vessel. Facilities available at the site include parking, toilets, showers, guided tours, and boat charters.

Koh Khang Suea is a reef site located in the Koh Ngam Islands, Thailand, suitable for both divers and snorkellers. The reef structure extends from shallow depths down to 25 metres, allowing for varied exploration. Access is exclusively by boat, and the site is well-suited for beginners due to generally mild currents. Visibility at the site is variable, ranging between 5 and 25 metres. Because visibility can drop significantly, it is recommended to check conditions before entering the water and to remain close to your guide or boat line. The site is also available for night diving.

Koh Rang Ban That is a reef dive located 500 metres off the coast of Chumphon. The site is well-suited to beginners, featuring a reef structure that ranges from 5 to 11 metres in depth with an average of 8 metres. Divers experience mild currents and visibility between 5 and 15 metres. Access is by boat, and divers should be prepared for potential surf or chop during entry and exit. Maintain good buoyancy to avoid contact with sharp coral and rocks. Visibility can fluctuate, so stay close to your buddy or guide throughout the 45-minute dive.