Ao Sane beach on Koh Racha Yai offers an accessible shore dive suitable for beginners. The reef topography sits at depths between 6 and 14 metres, with an average depth of 12 metres. Divers typically experience mild currents and visibility ranging from 5 to 10 metres. The site is well-equipped with parking, toilets, showers, and a rinse station, alongside a local dive shop providing air fills and guided tours. Night diving is permitted here, offering a different perspective of the reef environment. Species recorded around this area include various moray eels, wrasses, butterflyfish, and lionfish. Be aware of sharp coral when entering and exiting the water.

Yanui beach on Koh Racha Yai offers a shallow reef environment suitable for beginners and open water training. The site features a hard coral reef set against a sandy bottom, providing clear topography for navigation practice. Divers and snorkellers can expect depths ranging from 8 to 14 metres, with an average depth of 10 metres. Entry is made directly from the shore. Conditions are generally mild, though visitors should be aware of potential surf, strong currents, and the presence of sea urchins and sharp coral. Typical dives last around 45 minutes, and the site is accessible for night diving.

Koh Racha Yai is a boat-access site located 25 kilometres from shore, offering a varied underwater landscape that includes natural reefs, artificial reefs, walls, and wrecks. The site spans depths from 3 to 60 metres, with an average depth of 20 metres. Divers encounter mild currents that can strengthen unexpectedly, and visibility typically ranges between 15 and 40 metres. Due to the potential for fluctuating visibility and shifting currents, particularly on wall sections where depth can increase rapidly, this site is suited for intermediate divers. Water temperatures remain between 26 and 30 degrees Celsius. Guided tours, equipment rental, and air fills are available for standard 60-minute dives.

Koh Racha Yai offers a diverse underwater environment featuring a combination of natural reefs, wrecks, and artificial reef structures. Located in the Andaman Sea, this site is accessible only by boat and is suited for intermediate divers. Depths range from 3 to 30 metres with an average of 15 metres. Divers should be prepared for moderate currents that can shift in direction and strength. Visibility fluctuates between 5 and 25 metres, while water temperatures remain warm, typically between 28 and 30 degrees Celsius. Due to active boat traffic, divers must deploy a marker buoy before ascending. Always maintain buoyancy to avoid contact with sharp coral and rocky structures.

Koh Pu is a reef site located off Koh Racha Yai, Thailand, offering a straightforward experience for divers. The site features depths ranging from 2 to 15 metres with an average of 10 metres, making it suitable for beginners. Access is by boat, and the site is characterised by mild currents and visibility ranging from 5 to 30 metres. Divers should be aware of potential hazards including jellyfish, sharp coral, and stonefish. Exposure protection is recommended to avoid cuts from the reef. Guided tours are available through local dive shops, which are recommended for navigating the area effectively.

Kata Reef at Koh Racha Yai is a shore-accessible site featuring a combination of natural reef, artificial reef structures, and wall topography. Located 50 metres from the shore, the site offers shallow diving with depths ranging from 2 to 15 metres and an average depth of 9 metres. Conditions are generally mild, though divers should be aware of potential surf, surge, and variable visibility between 3 and 20 metres. The site is suitable for beginners and supports night diving, with typical dive times around 60 minutes. Facilities available nearby include equipment rental, air fills, and guided tours.

South Point at Koh Racha Yai offers reef diving for intermediate divers, with depths ranging from 8 to 25 metres. The site is accessed by boat and features moderate currents that can strengthen quickly, requiring good buoyancy control. Divers can explore the reef structure, which provides shelter from water movement. Marine life recorded at this site includes the laced moray, wrasses, vagabond butterflyfish, porcupinefish, crabs, azure sea stars, sergeants, rabbitfish, and various snails. Visibility typically spans 15 to 30 metres. Due to the current patterns, booking a guided tour is recommended to ensure safe entry and drift planning.

Buddha Island, also known as Koh Kaeo, is a reef site located 8 kilometres from Koh Racha Yai. The topography consists of rock formations covered in both soft and hard corals. This site is suited for advanced divers due to the presence of strong currents. Divers access the site by boat, with depths ranging from 8 to 15 metres and an average depth of 12 metres. Visibility at the site varies significantly, fluctuating between 2 and 15 metres. Water temperatures remain consistent throughout the year, typically between 29 and 31 degrees Celsius.