Dive Site: Racha Noi

About Racha Noi

Racha Noi, meaning 'small island', is the uninhabited southern counterpart to Racha Yai, located approximately 45 minutes further south of Racha Yai and accessible from Phuket. This rugged island is distinct from other Thai formations due to its hard granite geology, which significantly reduces sediment erosion and contributes to exceptional water clarity, often exceeding 20-30 meters. The underwater landscape is characterized by massive granite boulders and deep pinnacles that extend to sandy bottoms. These features, combined with variable currents, attract a diverse range of marine life, particularly large pelagics. While Racha Yai caters to beginners, Racha Noi is renowned for its more challenging conditions and deeper dive profiles. Divers frequently encounter manta rays and whale sharks, especially around its South Tip. Other inhabitants include various reef fish, eagle rays, and a variety of macro life in sheltered spots. The island's exposure to the open sea means conditions can be more dynamic, appealing to experienced divers seeking exciting encounters. Trips to Racha Noi are typically day trips from Phuket, often combined with dives at Racha Yai. The best diving conditions occur during the dry season from November to April, though the island's unique geography allows for diving year-round by utilizing protected leeward sides during windier periods.

Dive site facts: Racha Noi

Depth

Varies by site, deep pinnacles

Current

Moderate to strong

Visibility

20–30 m

Water temperature

27–30°C

Entry

Live boat / drift

Level

Advanced recommended

Dive type

Pelagic, drift, deep

Region / port

Andaman Sea, Phuket

Coordinates

8.1636° N, 98.7025° E

Conditions & Currents

Racha Noi is known for its exposure to open sea conditions, meaning currents here can be considerable. Due to its depth and proximity to open waters, divers should be prepared for moderate to strong currents, which are a key factor in attracting large pelagic species. While the main direction may vary, the island's unique geology means protected leeward sides can be utilized during windier periods, yet challenging conditions can still be present. Visibility at Racha Noi is consistently excellent, often ranging between 20 and 30 meters. However, divers should be aware of sudden thermoclines, where water temperature can drop several degrees as nutrient-rich deep water rises, especially at more advanced sites. These thermoclines can sometimes affect visibility locally. Entry and exit strategies often involve drift diving, requiring good buoyancy control and careful planning to manage deepe

Marine life & sighting chances

Manta Ray

Mid October through mid-May (peak March-June) · common

Whale Shark

March to June · occasional

Spotted Eagle Ray

occasional

Moray Eel

common

Barracuda

common

Parrotfish

common

Nudibranch

occasional

Pipefish

occasional

Dive profile & how the dive runs

Diving at Racha Noi typically involves a live boat entry, often descending directly onto or near the exposed granite pinnacles and boulders. Due to the potential for strong currents, drift diving is common here, allowing divers to be carried along the contours of the island's rock formations. The dive usually progresses deeper, exploring the massive boulders and the white sandy bottom beyond, which can extend to significant depths. Focus areas include the South Tip for pelagic encounters. Divers should constantly monitor their depth and no-decompression limits, especially given the deeper profiles and potential for longer bottom times when observing large marine life. The safety stop is typically conducted as a controlled ascent from the reef structure into the blue, before being picked up by the boat following the drift.

Underwater photography

Racha Noi offers superb opportunities for both wide-angle and macro photography, thanks to its exceptional visibility and diverse marine life. For capturing the dramatic granite topography and large pelagics like manta rays or whale sharks, a wide-angle lens is essential. Be prepared to shoot quickly, as these transient subjects may only offer brief encounters. For macro enthusiasts, the granite crevices and rocky outcrops harbor nudibranchs and pipefish; a macro lens and a steady hand are recommended for these smaller subjects. Due to potential thermoclines, color correction may be necessary for deeper shots. Good buoyancy control is crucial to avoid stirring up sand and to maintain position in currents, allowing for stable shots without impacting the environment.

Combine with nearby dive sites

• Racha Yai — Bay 3

  A calmer, larger island often visited on the same day trip from Phuket, known for beginner-friendly sites.

Getting there & logistics

Racha Noi is primarily accessed via day boats departing from Phuket, typically within a two-hour journey. It is usually part of a full-day trip that might include dives at Racha Yai due to its closer proximity. Phuket International Airport (BKK) serves as the main gateway, with daily domestic flights connecting to major international hubs. Trip lengths to Racha Noi are generally single-day excursions, as it offers world-class diving without the need for liveaboards, allowing divers to return to land-based accommodation. There are no specific park fees mentioned, but dive operators will include all necessary costs in their trip packages.

Safety & environment

For Racha Noi, divers should possess advanced certification and experience with currents due to the exposed nature of the site and potential for deeper profiles. The nearest recompression chamber is located in Phuket, highlighting the importance of diligent dive planning, adherence to depth and time limits, and sufficient safety stops. Evacuation from the site would involve boat transfer back to Phuket. Comprehensive dive insurance, covering emergency medical care and recompression, is highly recommended. Specific hazards include strong, unpredictable currents and potential thermoclines; divers should maintain good buddy contact and excellent buoyancy control. Always follow your dive guide's instructions, especially regarding entry and exit procedures for drift dives, to ensure a safe and enjoyable experience.

Who it suits — and who it doesn't

FAQ

Racha Noi FAQ

Liveaboards diving Racha Noi

These liveaboards may visit Racha Noi on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Mandarin Queen 9

Thailand

26 guests37.5 m

Manta Queen 8

Thailand

24 guests

$127/day

The Junk

Thailand

18 guests33 m

$163/day

Deep Andaman Queen

Thailand

23 guests30.5 m

$194/day

Explorer

Thailand

16 guests25 m

$150/day

Andaman

Thailand

20 guests26 m

$108/day

Stingray

Thailand

8 guests24 m

$245/day

Seatopia

Thailand

24 guests24 m