Similan Islands Dive Sites 2025

The Similan Islands has some world-class scuba diving, and an array of awesome dive sites to explore by liveaboard boat. See our detailed explorations of each dive site.

Richelieu Rock

Thailand’s best dive site, bar none. A stunning array of soft corals and spectacular stampeding marine life Read More

Koh Bon

Thailand’s manta ray hotspot, with plenty of other things to see if the mantas don’t show up Read More

Koh Tachai

Koh Tachai is one of the Similan Islands’ best dive sites but also one of the most volatile. Massive fans, huge schools of fish, maybe manta rays – it’s all to play for. Read More

Boulder City

A dramatic deep water Similan dive site, Boulder City needs the right conditions to explore as it’s exposed to wind and wave from all sides Read More

Shark’s Fin Reef

A dramatic block of rock rising out of the sand, Shark’s Fin Reef is one of the Similan Islands’ most exciting sites Read More

Hideaway Bay / Tuna Wreck

Two Similan Islands dive sites in one location, Hideaway Bay and Tuna Wreck can be experienced in a single dive Read More

🛳 Similan Islands Liveaboard
Trip Planning Checklist

A Similan Islands Liveaboard is typically 4 days and 4 nights long - decide your dates and search for availability on liveaboard.com
Also check our Last Minute Liveaboard Deals page for Similan Islands liveaboard discounts.
FWIW, I've dived with and like Blue Dolphin, Smiling Seahorse, The Phinisi, Dolphin Queen and Thailand Aggressor.
Check times and pricing of flights to Phuket or the bus to Khao Lak with 12go
Check my liveaboard packing list to make sure you bring all you need
It's compulsory to have diving insurance. World Nomads offers diving insurance as part of their Thailand travel insurance
Book a hotel in Khao Lak or Phuket for when you get back from the liveaboard.
Decide if you want to stay on in Khao Lak after your trip and go see Khao Sok national park, or head south to explore Phuket

North Point

North Point is another of the Similans’ signature big boulder sites, with huge great rocks rising out of the white sand. Read More

Koh Bon Pinnacle

Koh Bon Pinnacle is a deep dive site that feels utterly remote – and where anything could show up out of the blue. Read More

West Of Eden

A big boulder site with spectacular outsize fan corals, beautiful soft corals and the promise of full fish activity, West Of Eden is an archetypal Similan Islands dive site. Read More

Ao Suthep, Surin Islands

Ao Suthep is beautiful hard coral gardenx in the Surin Islands, often visited by Similan island diving liveaboards and accessible by snorkellers visiting the Surin Islands too. Read More

Three Trees

Three Trees, named after the three trees directly above the dive site on Similan Island 9, is a big wide white sand channel with some awesome corals and fish encounters Read More

Christmas Point

One of the signature Similan Islands big boulder dive sites, Christmas Point’s huge rocks have been shaped by the tides over hundreds of years. Read More

When Can I Dive The Similan Islands?

The Similan Islands National Marine Park is open from mid-October to mid-May each year. It’s closed during monsoon season from mid-May to mid-October – no liveaboards or speedboats are allowed into the park during this time. For more details on how to plan a Similan liveaboard diving holiday and what to expect along with how to get there and where to stay, see our overview Diving The Similan Islands: A Quick Guide

Recommended Similan Liveaboards October 2025 to May 2026

2025 Thailand Last Minute Liveaboard Deals

Summer Scuba Deals! – The Junk - 14 Oct 2025 - from $1,272.00 - Experience the lush underwater life of the Andaman Sea - 20% OFF - Valid for limited time only
Summer Scuba Deals! – Seatopia - 16 Oct 2025 - from $560.00 - Experience the lush underwater life of the Andaman Sea - 30% OFF - Valid for limited time only
Summer Scuba Deals! – Manta Queen 7 - 18 Oct 2025 - from $615.00 - Experience the lush underwater life of the Andaman Sea - 20% OFF - NEWLY ADDED! Valid for limited time only