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Big Blue Diving Khao Lak

Similan Liveaboard Experts

Similan Liveaboard
Similan Diving Day Trips

Our diving day trips will start again in November 2025. Hope to see you then.

2025 - 2026 Season - Early BIRD DISCOUNT

10% OFF ALL CABIN PRICES

Reserve you spot for the 2025 – 2026 Similan diving season now and get 10% off your cabin price.

Big Blue Diving Khao Lak

Big Blue Diving has been offering diving in Thailand for over 20 years and in Khao Lak since 2003.
 Khao Lak is the perfect departure point for the Similan and Surin Islands. 
The clear waters of the Andaman Sea typically provide great visibility and a huge diversity of marine life.

Our Similan liveaboard and Similan day trips offer diving at both the Simian and Surin Islands including the amazing Koh Bon, Koh Tachai and Richelieu Rock commonly regarded as Thailand’s best dive site.

Our Similan Liveaboard the Blue Dolphin

Our Similan Liveaboard

MV Blue Dolphin

A Similan Liveaboard allows you to do the most amount of diving in the shortest possible time, without ever feeling rushed. The MV Blue Dolphin offers 14 dives on our Similan 4 day cruise. Staff are professional and experienced. We are also a CCR and side-mount friendly boat with set up space and guides available for either style of diving.

Enjoy the spacious relaxation areas around the boat plus delicious Thai and international cuisine at an unbeatable price.

Our Similan Liveaboard

Dive with Us on The Blue Dolphin

Our Similan liveaboard trips are 4 days and 4 nights. The perfect length of time to see all the best dive sites that the Similan Islands and world famous Richelieu Rock have to offer.

4 days / 4 nights from 26,800 THB

With Big Blue’s legendary service there’s no better way to see the Similan Islands and Richelieu Rock

Up-Coming Similan Liveaboard Departures

Trip: BB2501
16 – 20 October 2025

4D/4N Similans/Richelieu

14 dives

Trip: BB2502

4D/4N Similans/Richelieu

14 dives

Trip: BB2503

4D/4N Similans/Richelieu

14 dives

Trip: BB2504

4D/4N Similans/Richelieu

14 dives

Trip: BB2505

4D/4N Similans/Richelieu

14 dives

Similan Liveaboard Features

The saloon on our Similan liveaboard
Air-conditioned Recreational Areas
Similan liveaboard sun deck
Part Shaded Sun Deck For Relaxing
camera table and storage
Professional Camera Set-up Area
Dining area on our Similan liveaboard
Spacious Outdoor Dining Area

Our Day Trip Speedboat

Dive with Us on the Wave Rider

Our daily schedule allows you to dive the best the West Coast has to offer, plus we dive at the world famous Richelieu Rock four days a week. This is the fastest way to see the best of the Similan and Surin National Parks

Day Trip Diving

To The Similans and Richelieu Rock

Big Blue Diving Khao Lak now has more day trip diving options than ever!!

All our diving day trips are two dives. Depending on dive site it is a journey of only 50 to 80 minutes. Enjoy a delicious home-cooked Thai style buffet lunch after the first dive and be back on land in time for sunset on the beach.
Tomorrow's Dive Sites

19 May 2025

Koh Bon & Tachai

Tuesday Dive Sites

20 May 2025

Surin Islands and Richelieu Rock

Need anything for your dive trip?

Big Blue Shop

Why not order now and we will have it waiting for you on your arrival on-board the MV Blue Dolphin.

The Big Blue Dive Equipment Shop

Coming to dive with us? 
Need anything for your trip?

Why not order now and we will have it waiting for you when you arrive in Khao Lak

Our store has some of the worlds best brands available at great prices.

When booking a trip with us, you will qualify for some even better deals too.

Live and Let Dive
Big Blue Diving Khao Lak

Our Similan Liveaboard Trip Reports

27 Apr – 01 May 2025

Trip 33 has just returned. We started off with a wicked display of Mother Nature’s power in Thap Lamu, fork lightning and heavy rain slightly delaying departure, but stunning to watch and listen to. As most people went off to bed we made our departure out to the Similans.

21 – 25 April 2025

Right from the word go, we could see this was going to be a great trip. The atmosphere between all you guys kind of clicked straight away and from there on we knew this trip was going to be a good one. As you all now know, we had the lovely Eve on board, as part of our “test” to see how we could incorporate the Andaman Turtle Watch Project.

15 – 19 April

Trip 31 has successfully returned back to land and what a fantastic trip it was with some old friends returning for more Andaman fun and some new friends made too 🙂 Kicking off proceedings we had a relatively smooth departure night with some delicious food and flat seas taking us out to the Similan Islands.

2025 - 2026 Similan Diving Season - Early BIRD DISCOUNT

10% OFF ALL CABIN PRICES

Reserve you spot for 2025 – 2026 now and get 10% off your cabin price.