Living in Phuket for six years, I've had the luxury of diving on calm December mornings when visibility stretches 30 metres and you can count the spots on a whale shark. I've also bodysurfed my way off a boat during a May squall at Racha Yai. The Andaman Sea can be spectacular or savage — this guide tells you when to go, where to go, and what to pay.
Phuket sits at the gateway to the Andaman Sea, one of the world's richest marine ecosystems. Within a 40-minute boat ride of Chalong Pier you have multiple world-class dive sites. Add a two-hour liveaboard trip and the Similan Islands put you in the top-ten dive destinations on the planet.
Bangkok Hospital Phuket (Phuket Town) has the island's hyperbaric recompression chamber. Phone: 076-254425. If you or a buddy show any symptoms of decompression sickness — joint pain, skin mottling, numbness, breathlessness — go immediately. Don't wait for symptoms to pass. Serious cases may require evacuation to a larger facility in Bangkok.
Top Dive Sites Around Phuket
The best sites cluster around Phuket's southern tip and the islands to the south and east. Here are the sites worth your air.
Racha Yai (Raya Island)
40 minutes south of Chalong Pier, Racha Yai is Phuket's most popular day-dive destination — and for good reason. Multiple bays offer shallow, calm water with good visibility year-round. Look for reef fish, leopard sharks, and the resident bumphead parrotfish school.
Shark Point (Hin Musang)
Three pinnacles rising from 25m, famous for leopard shark sightings (they sleep on the sand during the day). Also expect seahorses, ghost pipefish, and magnificent anemone fields. Diveable year-round — the east-facing location offers protection from monsoon swells.
King Cruiser Wreck
This 85-metre passenger ferry sank in 1997 (accidentally hit Anemone Reef) and now sits at 32m, completely encrusted with hard and soft corals. Great penetration opportunities for advanced divers. Lions, scorpion and frogfish haunt the wreck year-round.
Anemone Reef
A submerged pinnacle absolutely carpeted in anemones and anemonefish — including the rare pink skunk clownfish. Usually dived as part of a day trip that includes King Cruiser Wreck and Shark Point. Current can be strong; experienced divers only in peak season.
The Similan Islands — Phuket's Crown Jewel
Two hours north of Phuket by liveaboard, the Similan Islands (Mu Ko Similan National Park) offer some of Asia's finest diving: granite boulders, drop-offs, cleaning stations, and good pelagic encounters including whale sharks and manta rays. Important: The park closes 15 May to 15 October every year by royal decree — no exceptions. Day trips are possible from a speed boat but most divers do 3–5 night liveaboard trips from October to April. Prices range from ฿8,000 for budget liveaboards to ฿30,000+ for luxury vessels.
Monthly Visibility Guide
The Andaman Sea has two distinct seasons. The northeast monsoon (November–April) delivers Phuket's best diving. The southwest monsoon (May–October) brings rougher seas, but east-coast sites remain accessible and the water temperature stays a warm 28–30°C year-round.
| Month | Visibility | Conditions | Similan Islands | Racha Yai | Shark Point |
|---|---|---|---|---|---|
| November | 15–25m | Calming | Open (Oct 15) | Excellent | Excellent |
| December | 20–30m | Calm, clear | Open | Excellent | Excellent |
| January | 25–30m | Peak season | Open | Excellent | Excellent |
| February | 25–30m | Peak season | Open | Excellent | Excellent |
| March | 20–28m | Excellent | Open | Excellent | Excellent |
| April | 15–25m | Good | Open | Good | Good |
| May | 8–15m | Turning rough | Closed May 15 | Variable | Good |
| June | 5–12m | Monsoon | Closed | Limited trips | Fair |
| July | 5–10m | Monsoon | Closed | Limited | Fair |
| August | 5–12m | Monsoon | Closed | Limited | Fair |
| September | 8–15m | Late monsoon | Closed | Variable | Fair |
| October | 10–18m | Improving | Open Oct 15 | Good | Good |
Best Dive Shops in Phuket
Stick to PADI-certified dive centres with proven safety records. Chalong (Ao Chalong) is the main hub — most boats depart from Chalong Pier. Karon and Kata also have good operators. Avoid the cheapest Patong touts; cut-rate diving means cut-rate safety.
One of Phuket's oldest and most respected dive shops, operating since 1993. PADI 5-Star IDC centre. Specialises in Similan liveaboards and local day trips. Small class sizes and attentive instructors. Equipment well-maintained. Courses from ฿2,500 (Try Dive) to ฿55,000 (Divemaster).
PADI 5-Star IDC centre with friendly staff and well-organised trips. Popular with expats and repeat divers. Run their own liveaboard to the Similans and Richelieu Rock (another top-tier site). Responsive and reliable — good communication in English, German, Swedish.
PADI 5-Star Gold Palm IDC — the highest PADI certification. German-founded, extremely professional. Excellent for technical diving (nitrox, trimix) and dive courses. Their Chalong base is conveniently located near the pier. Also good for disabled divers — they have adaptive diving programmes.
Smaller boutique operator in south Phuket. Great for expats in Rawai and Nai Harn who don't want to drive up to Chalong. Personal service, maximum 6 divers per instructor. Local knowledge is excellent. Good for underwater photography groups.
PADI Dive Courses & Prices 2026
| Course | Duration | Prerequisites | Price (฿) |
|---|---|---|---|
| Discover Scuba (Try Dive) | Half day | None, pool/shallow water | ฿2,500–3,500 |
| PADI Open Water Diver | 3–4 days | None, min age 10 | ฿12,000–16,000 |
| PADI Advanced Open Water | 2 days | Open Water cert | ฿9,000–12,000 |
| Emergency First Response | 1 day | None | ฿3,500–5,000 |
| PADI Rescue Diver | 2–3 days | Advanced + EFR | ฿11,000–14,000 |
| PADI Divemaster | 4–8 weeks | Rescue Diver, 40 dives | ฿35,000–55,000 |
| Fun Dive (1 dive) | Half day | Any OW cert | ฿1,500–2,200 |
| 4-dive day trip (Racha/Shark Pt) | Full day | OW cert | ฿3,500–5,000 |
Prices include equipment rental, boat, divemaster, and lunch on day trips. Your PADI certification is internationally recognised and never expires — get your Open Water done here and dive anywhere on earth.
Best Snorkeling Spots in Phuket
You don't need any certification to snorkel. Most beaches rent gear for ฿100–200/day. Here are the spots worth your time:
Beach Snorkeling (No Boat Needed)
- Kata Noi Beach — The rocky headland at the south end has decent reef. Best at low tide in calm season. About 10 minutes from Kata town.
- Nai Harn Beach — The bay's southern rocks shelter good coral. Popular with Rawai/Nai Harn expats — easy access, good parking.
- Freedom Beach — Near Patong but far quieter. Short boat taxi from Patong beach (฿100). Clear turquoise water with fish from the first metre.
- Laem Promthep — The cape area has rocky entries but excellent fish variety. Bring your own gear — no rentals nearby.
Snorkeling Day Trips (Boat Required)
- Racha Yai (Raya Island) — The best snorkeling in Phuket's immediate area. Day-trip boats depart Chalong Pier from 08:00. ฿1,200–2,000 pp including equipment and lunch.
- Phi Phi Islands — 1.5 hours south. More touristy now, but the water around Phi Phi Leh (Maya Bay) is still beautiful when the tide is right. Speed boats: ฿1,800–2,800 pp.
- Koh Bon & Koh Hae (Coral Island) — Short speed boat from Rawai. Good for families with children. ฿600–800 pp from Rawai beach.
Phuket's west coast beaches get rip currents during monsoon season (May–October). Even on calm days at Kata or Nai Harn, check with lifeguards before snorkeling. Yellow flag = caution; red flag = no swimming. Rips pull you sideways — swim parallel to the beach, not against the current, to escape.
Don't Dive Without Dive Insurance
Standard expat health plans often exclude decompression illness treatment and evacuation. Make sure your policy covers hyperbaric treatment. Get covered before you get in the water.
