
Ecotao Lodge
★★★★
★ 9.4/10 (902 reviews)
1.9 km away as the crow flies
Dive centre · Koh Tao · Thailand
4.91,273 Google reviewsExplore the granite pinnacles and WWII wrecks of Koh Tao from a PADI 5-Star IDC centre with dedicated private boat access.
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Located on the island of Koh Tao, Isla Tortuga Divers serves as a professional hub for divers looking to explore the Gulf of Thailand. The centre is positioned near the main pier, making it easily accessible via a one-hour boat trip from Koh Phangan. It operates as a boutique diving operation, focusing on personalised experiences and small group sizes for both training and exploration dives.
Whether you are starting your journey with an Open Water Diver course or progressing through professional levels, the centre provides the infrastructure required for serious diving. This includes air-conditioned classrooms for theory and three dedicated training pools for confined water sessions. The facility also includes an on-site boutique hostel, creating a social environment for divers to connect after a day on the water.
As a PADI 5-Star IDC centre, the team is geared towards high-level professional training, including Divemaster and Instructor Development Courses (IDC). The instructors are highly qualified and experienced, with a focus on mentorship and continuous professional development. They are able to conduct courses in English, Spanish, and German, ensuring clear communication for a wide range of divers.
The centre emphasises a personalised approach, maintaining reduced student-to-instructor ratios to ensure safety and individual attention. This focus extends to their commitment to marine conservation, working with PADI AWARE and local reef restoration projects. They also integrate environmental responsibility into their daily operations, such as minimising single-use plastics on their boats.
The course catalogue covers the entire PADI spectrum, starting from the Open Water Diver and Advanced Open Water Diver certifications. For those looking to specialise, the centre offers the PADI Deep Diver Specialty, Nitrox, Wreck Diver, and Night Diver courses, as well as courses in buoyancy control, underwater navigation, and sidemount diving.
Professional divers can progress through the Divemaster and Instructor Development Courses (IDC), including Staff Instructor training and Master Scuba Diver Trainer programmes. The centre also provides EFR (Emergency First Response) training and specialty courses such as PADI AWARE and Marine Naturalist to deepen your understanding of the local ecosystem.
The centre operates three modern boats, providing access to the best dive sites around Koh Tao, all within a 30-minute transit. These boats are equipped with emergency oxygen and managed by a qualified crew to ensure safety during every excursion.
For full-day trips, the boats provide fresh fruit and water on board. The vessels are configured to support various dive profiles, including night dives, and carry Nitrox for divers who require it.
The centre provides a full range of rental kit, including regulators and BCDs that are rigorously inspected daily. For those completing training, modern dive computers are provided to all clients.
On-site facilities include air-conditioned classrooms equipped with modern audiovisual systems for theory work. For skills practice, the centre utilises three dedicated training pools, allowing for controlled confined water sessions away from the swell.
Chumphon Pinnacle is a series of massive granite pinnacles ranging from 14 to 35 metres deep. It is a premier site for spotting large schools of fish and is the primary location for seeing whale sharks (Rhincodon typus) between March and May, and again from September to October.
HTMS Sattakut is an iconic WWII wreck resting on a sandy bottom at depths between 18 and 30 metres. This 50-metre vessel serves as an artificial reef, where you can explore anti-aircraft guns and see life such as giant groupers (Epinephelus itajara) and sweetlips (Plectorhinchus) inhabiting the hull.
Sail Rock is a significant granite pinnacle located between Koh Tao and Koh Phangan. It features a vertical swim-through known as 'The Chimney' at 18 metres, and the site is a known corridor for whale sharks (Rhincodon typus) and large schools of bigeye trevallies (Caranx).

down to 31 m

down to 28 m

down to 25 m

down to 42 m

down to 40 m
And some of the dive sites the centre runs.
The marine life at Koh Tao is defined by its vibrant coral gardens and diverse pelagics. You will frequently encounter green turtle (Chelonia mydas), hawksbill turtle (Eretmochelys imbricata), and various species of snapper and jack (Carangidae) patrolling the reefs. Large schools of chevron barracudas and yellowtail barracudas are common, alongside bigeye trevally (Caranx) and king mackerel.
On the rocky pinnacles and reef walls, look for giant grouper (Epinephelus itajara), batfish (Platax), and various species of triggerfish (Balistidae), including the titan triggerfish. You may also spot blue-spotted rays (Batoidea) and Jenkins' whiprays gliding over the sandy patches near the reef base.
For macro enthusiasts, the sites offer plenty of smaller treasures. Keep an eye out for nudibranchs (Chromodoris willani), various species of shrimp (Caridea), octopus (Octopus vulgaris), and pipefish. The reefs are also home to colourful anemones (Actiniaria) inhabited by clownfish (Amphiprion) and various species of scorpionfish (Scorpaenidae).
Diving is best experienced from March to October, when the sea is generally calm. During the monsoon season, typically from October to November, visibility can be reduced and conditions may be less favourable for diving.
Most dive sites around Koh Tao are characterised by minimal currents and calm seas, making them accessible for a wide range of experience levels. The granite pinnacles can sometimes host more movement, but the reef flats and sites like Twins offer very calm, sheltered conditions.
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Ratings and reviews collected by Viator and Tripadvisor.