Shark Island Dive Site

current-swept reef, soft coral, schooling fish and more adventurous local diving

Overview

Best for: Advanced, confident OW, photographers and divers wanting colour/fish/current
Not ideal for: nervous beginners, DSD or calm sandy training
Vibe: exposed, colourful, fishy and current-prone
Must-do or easy local site: must-do local fun site for confident divers

Depth and Certification Level

Depth: about 5-25+ m
Beginners: only confident beginners in excellent conditions
Open Water: usually not standard OW training
Advanced Open Water: yes
Recommended certification: Advanced ideal; confident OW with guide in good conditions
Guide recommended: yes

Marine Life and Underwater Scenery

Landscape: surface island/pinnacle, rocky slopes, soft coral, hard coral and reef edges
Common marine life: reef fish, butterflyfish, angelfish, parrotfish, wrasse, rabbitfish, damselfish, fusiliers, snappers, groupers, moray eels, blue-spotted rays and anemonefish, trevally, barracuda and triggerfish
Special sightings: whale sharks, turtles, Jenkins rays, cobia, sea snakes and cuttlefish
Macro life: moderate
Bigger fish: yes by Koh Tao standards
Coral and reef scenery: yes, one of the better colourful reef sites
Photography: yes when visibility/current cooperate

Conditions and Hazards

Visibility: variable, often 5-20 m but can be better/worse
Current: often, plan for it
Weather sensitivity: southeast/east/south swell affects it
Shelter/exposure: exposed, with sheltered sides depending current
Wind and sea conditions: south/east/southeast swell
Hazards: current, depth, surge, boat traffic, triggerfish and separation
Swim-throughs/caves: not a main swim-through site
Wreck penetration: No, unless this is a wreck-specific page. For HTMS Sattakut only, penetration requires proper wreck training, equipment and supervision.

Typical Dive Profile

start sheltered side, deeper slope first, follow island contour, finish shallow

Morning/afternoon/full-day: morning usually
Boat time: 20-35 minutes; closer from south/Chalok
Night diving: not standard
Dive schools: yes for fun/AOW
Busy with boats: can be busy on good days

Courses and Skills

Try dives: no
Refreshers: only confident refreshers
Deep dives: yes, reasonably
Navigation: yes but challenging
Buoyancy: yes for controlled divers
Specialties: deep, photo, fish ID, naturalist and current-awareness

Local Advice

Shark Island can be colourful and full of fish in the right conditions, but current and exposure are part of the site. It is not a calm sandy training dive.

Nearby Paired Sites

Ao Leuk, Hin Ngam, Sai Daeng, Tanote, Laem Thian

Ao Leuk Dive Site | Sail Rock | Diving in Koh Tao

Local Tips

What makes it different: more exposed and colourful than easy reefs
Manage expectations: not actual guaranteed sharks; current possible
Best thing: colour, fish and energy
Main downside: current/exposure
Tip: don't fight current; let the guide choose the sheltered side