Southwest is a pinnacle dive site located 7000 metres from Koh Nang Yuan. The site features craggy overhangs and reaches depths between 5 and 30 metres, with an average depth of 22 metres. Divers should be prepared for moderate currents and potential strong current conditions. Visibility at the site is highly variable, ranging from 2 to 40 metres. Due to the depth and current, this site is best suited for intermediate divers. Access is by boat only, with typical dives lasting around 30 minutes. Hazards include strong currents and triggerfish. Water temperatures remain warm throughout the year, ranging from 28 to 31 degrees Celsius.

Southwest Pinnacle is a series of submerged rock formations located near Koh Nang Yuan. The site features a complex topography of pinnacles, reefs, and walls that descend from 5 metres to a maximum depth of 30 metres, with an average depth of 20 metres. Access is by boat only, as the site is situated over 7 kilometres from the shore. Divers should be prepared for moderate currents and potential surge, which can impact visibility. Due to the depth and current conditions, this site is recommended for advanced divers. Typical dive times are approximately 50 minutes. Facilities available include boat charter services and parking at the departure point.

Southwest Pinnacles is a series of underwater rock formations located 7000 metres from Koh Nang Yuan. The site features a combination of pinnacles, walls, and reef structures reaching depths between 5 and 30 metres, with an average depth of 20 metres. Due to the location, this site is suited for advanced divers. Conditions are variable, with visibility ranging from 2 to 20 metres and strong currents often present. Divers should be aware of potential hazards including surge, low visibility, and the presence of stonefish and sharks. Boat access is required for all dives at this location.

Tao Tong is a mixed-environment site located at Koh Nang Yuan, Thailand, featuring a combination of muck substrate, artificial reef structures, and natural reef. With depths ranging from 5 to 9 metres, it is well-suited for beginner divers. The site experiences mild currents and visibility typically between 10 and 20 metres. Divers should be aware of entanglement risks posed by artificial reef structures and exercise caution around blue ringed octopus. Night diving is available at this location. Access is by boat only, and the use of a torch is recommended to observe small creatures within the muck substrate.

June Juea Bay is a quiet, secluded reef site located on Koh Nang Yuan. The site features a shallow reef structure with depths ranging from 2 to 12 metres, averaging 7 metres. It is accessible via shore entry and is suitable for beginners. Divers and snorkellers can expect mild currents and visibility typically between 10 and 25 metres. Water temperatures remain warm throughout the year, generally between 28 and 31 degrees Celsius. The site is suitable for night diving, with a typical dive duration of 45 minutes. Facilities at the location include a cafe. Be aware of sharp coral when entering or navigating the reef.

Buddha Rock, located off Koh Nang Yuan, is a reef site suitable for both snorkellers and beginner divers. The site features depths ranging from 1 to 14 metres with an average of 10 metres and visibility between 10 and 30 metres. Divers and snorkellers frequently encounter wrasses, longfin bannerfish, golden butterflyfish, and blue-barred parrotfish. Less common sightings include bluespotted fantail rays, titan triggerfish, pink skunk anemonefish, and various groupers. The site is accessible by boat or from the shore. Visitors should remain aware of boat traffic and the presence of sharks. Night diving is available through local dive shops, offering a different perspective of the reef.

Sai Nuan Beach is a reef site located on Koh Tao, offering a peaceful environment for both divers and snorkellers. The site features a shallow reef with depths ranging from 1 to 5 metres, averaging 3 metres. Entry is directly from the shore. Conditions are generally mild with visibility between 5 and 25 metres. Water temperatures remain warm throughout the year, fluctuating between 28C and 31C. The site is suitable for beginners, though visitors should remain aware of boat traffic, sea urchins, and sharp coral. Facilities available at the beach include a cafe, toilets, showers, and equipment rental.

Chalok Bay is a shore-entry reef dive located at Koh Nang Yuan, suitable for beginner divers. The site features depths ranging from 5 to 14 metres, with an average of 10 metres. Divers experience mild currents and visibility typically between 10 and 20 metres. Water temperatures remain warm throughout the year, ranging from 28 to 31 degrees Celsius. Hazards include jellyfish, sea urchins, sharp coral, and potentially aggressive triggerfish. Divers should shuffle through the shallows to avoid urchins and maintain awareness of their surroundings. Facilities at the site include parking, toilets, showers, rinse stations, equipment rental, and air fills.