Diving in Phuket — Day Trips, Wrecks & Gateway to the Similans

Phuket's local dive sites are spread across three main areas, all reached by day trip boats departing from Chalong Bay.

King Cruiser Wreck: An 85-meter car ferry that struck a submerged reef and sank in 1997 between Phuket and Koh Phi Phi. The wreck sits upright at 12–32 meters on a sandy bottom. The superstructure has collapsed significantly but the hull is intact and heavily colonised by lionfish, scorpionfish, and nudibranchs. Penetration into the engine room is possible for experienced divers but the structure continues to deteriorate. Currents are usually mild. This is Thailand's most popular wreck dive and a regular stop on Phuket day trips.

Shark Point (Hin Musang): Three submerged limestone pinnacles rising from 18–22 meters to within 5 meters of the surface. The rocks are covered in stunning pink and purple soft corals, sea fans, and barrel sponges. Leopard sharks rest on the sandy bottom between the pinnacles — sightings are common year-round. Excellent macro: nudibranchs, seahorses, harlequin shrimp, and porcelain crabs. Moderate currents bring in nutrients that make this the most colourful dive site in the Phuket area.

Anemone Reef (Hin Jom): A single submerged rock covered entirely in anemones and their resident clownfish, located between Shark Point and King Cruiser. Usually combined as the third dive on a triple-site day trip. Maximum depth 25 meters, best at 12–18 meters. A relaxed, colourful dive.

Racha Yai and Racha Noi: Two islands 25km south of Phuket. Racha Yai has gentle sloping reefs ideal for training and easy fun dives (5–25m), with a few small wreck features placed as artificial reefs. Racha Noi is deeper and wilder — southern reefs drop to 30m+ with occasional manta ray sightings from January to April. Both islands have better visibility than mainland sites.

Phi Phi Islands: A longer day trip (2–2.5 hours each way) accessing walls and reefs around the iconic limestone karsts. Sites include Bida Nok (south wall with leopard sharks), Bida Nai (swim-throughs and soft coral), and Palong Wall (vertical wall diving). The journey is long but the scenery above and below water is spectacular.

Koh Dok Mai: A vertical limestone wall dropping from the surface to 25 meters, covered in soft corals and sea fans. An excellent night dive location with moray eels, lobsters, and sleeping parrotfish. Often combined with Shark Point trips.

Day trip logistics: All Phuket day trips depart from Chalong Bay pier between 7:30–8:30am, returning by 3:30–4:30pm. The standard boat ride to Shark Point/King Cruiser takes 60–90 minutes; Racha Yai is 40 minutes. Phi Phi requires 2–2.5 hours each way, making it a long day. Most operators provide breakfast snacks, lunch, and drinking water. Equipment is included in most packages or available for rent (600–1,000 THB/day for full set).

Pricing guide: 2-dive local trip (Racha): 2,500–4,000 THB ($70–115). 3-site trip (Shark Point + King Cruiser + Anemone Reef): 3,500–5,500 THB ($100–155). Phi Phi day trip: 4,000–6,000 THB ($115–170). Nitrox supplement: 200–350 THB per tank.

Month-by-month conditions: October — season opens, visibility building (10–15m), fewer boats. November–December — good conditions (15–20m), shoulder pricing. January–March — peak season, best visibility (20–30m), calmest seas, manta activity at Racha and Koh Dok Mai. April — still excellent, slightly warming. May — last month before monsoon, conditions variable.

Typical Phuket dive itineraries: 3 days (casual) — Day 1: Racha Yai (2 dives, easy reef), Day 2: Shark Point + King Cruiser + Anemone Reef (3 dives, the classic triple), Day 3: rest or Phi Phi trip. 5 days (dedicated) — Add Racha Noi for deeper dives and possible manta sightings, plus a second King Cruiser visit for wreck exploration. 7+ days — Combine 3–4 Phuket day trips with a 4-night liveaboard departure for the Similans.

Phuket is excellent for divers who want easy logistics, variety within a few days, and the option to add a liveaboard. Beginners enjoy Racha Yai training dives. Intermediate divers love Shark Point and King Cruiser. Photographers rate Shark Point among the best macro dives in the Andaman. Tech divers use Phuket as a base for deeper explorations and nitrox/trimix training.

October–May, matching the Andaman season. Peak: January–April for clearest water and calmest seas. Day trips run throughout the season. Racha islands can be dived year-round in calm weather but conditions are unpredictable June–September. Liveaboards depart from Phuket October–May.