Coral Island, located near Koh Racha Yai, offers a reef dive suitable for beginners. The site features depths ranging from 2 to 20 metres, with an average depth of 10 metres. Divers access the reef by boat, encountering mild currents and water temperatures between 29 and 31 degrees Celsius. Visibility typically spans 5 to 15 metres, though it can fluctuate with little warning. On-site facilities include a dive shop, cafe, and showers. Due to variable visibility, divers should consult local staff regarding current conditions before entry. Morning departures are recommended to experience calmer surface conditions before increased boat traffic.

East Cape at Koh Racha Yai offers a straightforward reef dive suitable for beginners. The site features depths ranging from 5 to 15 metres with mild currents. Visibility varies significantly, ranging from 5 to 25 metres depending on conditions. Access is by boat only, and divers should be aware of boat traffic in the area. It is recommended to arrive early in the morning to avoid congestion from day-trip vessels. When surfacing, always listen for boat traffic and remain close to your guide. Use a surface marker buoy to ensure visibility to boat operators when ascending.

Koh Hey, also known as Coral Bay, is a shallow reef site located off Koh Racha Yai. The reef features depths ranging from 2 to 13 metres, with an average depth of 8 metres, making it suitable for beginners. Access is by boat, and the site experiences mild currents. Visibility typically fluctuates between 5 and 15 metres. Water temperatures remain warm throughout the year, between 29 and 31 degrees Celsius. Divers and snorkellers should be cautious of sharp coral and rocks; avoid touching the bottom or using the reef for support. Wearing fin booties or water shoes is recommended for protection.

Koh Dok Mai is a limestone island featuring a vertical wall, reef, and cavern topography. Reaching depths of 32 metres with an average of 18 metres, this site requires boat access and is suited for intermediate divers due to strong currents. Visibility varies between 5 and 20 metres. The site offers opportunities for night diving, with guided tours available. Species recorded around this area include various moray eels, wrasses, lionfish, and ghost pipefish. Divers should be aware of potential hazards including deep water, overhead environments, and thermoclines.

Bungalow Bay at Koh Racha Yai offers a diverse underwater environment featuring a natural reef, artificial reef structures, and a wreck. Suitable for beginners, the site ranges from 5 to 25 metres in depth with an average of 15 metres. Divers and snorkellers can access the site by boat or from the shore. Conditions are generally mild with visibility varying between 8 and 25 metres. Water temperatures remain warm throughout the year, typically between 28 and 31 degrees Celsius. Species recorded around this area include various moray eels, wrasses, and butterflyfish. Be aware of boat traffic in the area and sharp coral when navigating the reef.

Barracuda Rock is a submerged pinnacle located off Koh Racha Yai, Thailand. This advanced drift dive ranges from 5 to 30 metres in depth, with an average of 15 metres. The site features a structure covered in hard and soft corals and sea fans. Due to the location, strong currents are common and can accelerate quickly around the pinnacle. Visibility is variable, ranging from 5 to 25 metres. Divers must use boat access to reach this site. Night diving is permitted. Given the potential for strong currents, low visibility, and sharp coral, this site is suited for experienced divers who can manage their position and maintain group contact.

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.