reef
Breakfast Bend
A clear-water site full of soft corals and reef fish.
Beginner
5–20 m depth
Season: Jan, Feb, Mar, Apr, Nov, DecCurrent: Low
- reef
- clear water
Destination guide · Similan Islands
Similan Islands – Thailand’s blue-water safari
The Similans deliver 30+ meter visibility, granite boulders, and encounters with manta rays or whale sharks between November–April. Trips depart Khao Lak for 3–5 day itineraries covering Similan + Surin national parks.Between dives you’ll anchor near white-sand beaches and hike view points. Boats range from budget cabins to luxury yachts with camera rooms, nitrox, and tech support.
Season
Open Nov–Apr only. Parks close during monsoon (May–Oct).
Difficulty
Best for Advanced divers comfortable with current, negative entries, and 30m depth profiles.
Boats
Fleet choices include steel-hull liveaboards, boutique yachts, and speedboat-supported day trips.
Planning tips
Planning tips
- Book early (3–6 months) for peak Jan–Mar departures; cabins sell fast.
- Pack reef-safe sunscreen and dry bags – tender rides ferry you ashore for island visits.
- Cell service is limited offshore; confirm satellite messaging or Wi-Fi options if needed.
Dive sites around Similan Islands
Dive planners highlighted these nearby sites so you know what to expect before booking.
reef
Christmas Point
A scenic site with arches and large boulder structures.
Intermediate
12–35 m depth
Season: Jan, Feb, Mar, Apr, Nov, DecCurrent: Medium
- arches
- reef fish
- swim-throughs
rock
Deep Six
A deep granite ridge for experienced divers.
Advanced
20–40 m depth
Season: Jan, Feb, Mar, Apr, Nov, DecCurrent: Strong
- deep diving
- pelagic
- currents
rock
Elephant Head Rock
Granite boulder formations with strong currents and deep channels.
Advanced
15–40 m depth
Season: Jan, Feb, Mar, Apr, Nov, DecCurrent: Strong
- swim-throughs
- currents
- pelagic
reef
Hideaway Bay
A gentle site ideal for beginners.
Beginner
5–20 m depth
Season: Jan, Feb, Mar, Apr, Nov, DecCurrent: Low
- reef
- easy conditions
Show 7 more dive sites
wall
Koh Bon Ridge
Famous for manta ray cleaning stations.
Intermediate
12–40 m depth
Season: Jan, Feb, Mar, Apr, Nov, DecCurrent: Medium
- manta rays
- pelagic
pinnacle
Koh Tachai Pinnacle
A deep pinnacle with strong currents and big fish action.
Advanced
18–40 m depth
Season: Jan, Feb, Mar, Apr, Nov, DecCurrent: Strong
- currents
- barracuda
- manta
reef
North Point
A gentle sloping reef with boulders and sandy flats.
Intermediate
10–35 m depth
Season: Jan, Feb, Mar, Apr, Nov, DecCurrent: Medium
- reef
- blue-spotted rays
pinnacle
Richelieu Rock
Thailand’s best dive site, known for whale sharks and rich biodiversity.
Advanced
10–35 m depth
Season: Jan, Feb, Mar, Apr, Nov, DecCurrent: Medium
- whale sharks
- macro
- purple soft corals
reef
Three Trees (Similan)
A Similan east side site with sloping reef, sand patches and scattered coral heads.
Intermediate
8–28 m depth
Season: Jan, Feb, Mar, Apr, Nov, DecCurrent: Medium
- sloping reef
- sand patches
- sea fans
reef
Torinla (Surin Islands)
A healthy reef site in the Surin Islands with abundant coral and reef fish.
Beginner
6–24 m depth
Season: Jan, Feb, Mar, Apr, Nov, DecCurrent: Low
- healthy reef
- Surin Islands
- reef fish
reef
Turtle Rock (Similan)
A Similan site with boulders, reef and frequent turtle sightings.
Beginner
6–24 m depth
Season: Jan, Feb, Mar, Apr, Nov, DecCurrent: Low
- turtles
- granite boulders
- reef
Quick questions about diving in Similan Islands
Can beginners join?
Open Water divers can join some itineraries but will be limited to 18 m and may skip advanced sites. We recommend finishing Advanced before boarding.
How cold is the water?
Expect 27–29°C with occasional thermoclines; a 3mm suit keeps you comfortable on repetitive dives.
Granite giants
Scenes from the Similans
Soft coral walls, swim-through boulders, and manta cleaning stations – these images show why divers return.
Gallery coming soon – check back for new photos.
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