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Gulf of Thailand

Dive Site Explorer

The most comprehensive interactive map of every dive site in the Gulf of Thailand. From world-famous pinnacles to hidden reefs and historic wrecks.

115 dive sites 13 regions 12 wrecks Updated April 2026

Interactive Map

Click any pin for details. Scroll to zoom.

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Showing 115 of 115 sites
Sail Rock Advanced Signature Peak

The Crown Jewel of the Gulf

5–40m pinnacle Koh Tao & Offshore
Whale Sharks Barracuda Batfish Giant Groupers +1

A massive granite pinnacle rising from 40m to break the surface, famous for whale shark encounters and its iconic vertical chimney swim-through.

Full Details → Book with Diego
Chumphon Pinnacle Advanced Signature Peak

Deep Pinnacles, Big Fish

12–40m pinnacle Koh Tao & Offshore
Whale Sharks Bull Sharks Giant Groupers Barracuda +1

A cluster of deep granite pinnacles draped in pink anemones, known for whale shark and bull shark sightings.

Full Details → Book with Diego
Southwest Pinnacle Advanced Peak

Anemone City

5–30m pinnacle Koh Tao & Offshore
Bull Sharks Barracuda Groupers Anemonefish +1

A stunning chain of submerged pinnacles carpeted in colorful anemones, with regular sightings of bull sharks and large pelagics.

Full Details → Book with Diego
Samran Pinnacle Advanced Peak

The Secret Pinnacle

9–28m pinnacle Koh Tao & Offshore
Barracuda Groupers Batfish Trevally

A lesser-known deep pinnacle near Chumphon Pinnacle that rewards adventurous divers with pristine marine life and zero crowds.

Full Details → Book with Diego
White Rock Beginner Peak

The Classic Night Dive

2–22m reef Koh Tao & Offshore
Sea Turtles Nudibranchs Triggerfish Moray Eels +1

Koh Tao's most popular all-rounder — a large rocky reef with incredible macro life and frequent turtle encounters.

Green Rock Advanced Peak

Cave Explorer's Playground

2–28m reef Koh Tao & Offshore
Groupers Snappers Blue-spotted Stingrays Barracuda +1

A labyrinth of swim-throughs, caves, and overhangs formed by massive granite boulders — the most adventurous reef dive on Koh Tao.

Red Rock Intermediate Peak

Compact Pinnacle, Big Surprises

2–20m pinnacle Koh Tao & Offshore
Barracuda Trevally Seahorses Nudibranchs

A small but lively pinnacle with surprising macro life and schooling fish, often overlooked in favor of flashier neighbors.

Japanese Gardens Beginner Peak

The Perfect First Dive

2–12m reef Koh Tao & Offshore
Sea Turtles Anemonefish Seahorses Nudibranchs +1

A sheltered coral garden with resident turtles, seahorses, and schools of colorful reef fish — the ideal site for beginners and underwater photography.

Full Details → Book with Diego
Twins Beginner Peak

Twin Pinnacles of Nang Yuan

5–18m pinnacle Koh Tao & Offshore
Barracuda Fusiliers Angelfish Triggerfish

Two rounded pinnacles near Koh Nang Yuan offering easy diving with colorful hard corals and swirling schools of fusiliers.

Shark Island Intermediate Peak

Current-Swept Action

0–25m island reef Koh Tao & Offshore
Blacktip Reef Sharks Barracuda Triggerfish Sea Turtles +1

A dramatic rocky island with strong currents that attract blacktip reef sharks, large barracuda, and pelagic visitors.

HTMS Sattakut Advanced Peak

Koh Tao's Flagship Wreck

18–30m wreck Koh Tao & Offshore
Groupers Barracuda Batfish Lionfish +1

A 48-meter decommissioned Thai Navy LCI warship sunk in 2011, now a thriving artificial reef and one of the Gulf's best wreck dives.

HTMS Suphairin 313 Advanced Peak

The Newest Wreck in Town

16–28m wreck Koh Tao & Offshore
Batfish Groupers Snappers Lionfish

A 44.9m Thai Navy fast attack craft sunk in 2023, still in pristine condition and rapidly colonizing with marine life.

HTMS Hanhak Sattru 312 Advanced Peak

Twin Sister of the Suphairin

13–24m wreck Koh Tao & Offshore
Batfish Lionfish Snappers Fusiliers

The second of two Thai Navy vessels sunk off Koh Tao in 2023, sitting shallower than its sister ship and accessible to a wider range of divers.

MV Trident Advanced Peak

Deep Wreck for Tech Divers

34–36m wreck Koh Tao & Offshore
Groupers Lionfish Moray Eels

A small cargo vessel resting at 36m near Shark Island — a deep dive reward for experienced divers and tech diving students.

Catamaran Wreck Beginner Peak

Easy Wreck for Beginners

14–18m wreck Koh Tao & Offshore
Snappers Fusiliers Porcupinefish Anemonefish

A small catamaran hull at 18m — a non-intimidating wreck perfect for beginners getting their first taste of wreck diving.

Hin Wong Pinnacle Advanced Peak

Deep Pinnacle off Hin Wong

10–32m pinnacle Koh Tao & Offshore
Barracuda Groupers Sea Turtles Batfish

A deep offshore pinnacle with big fish action, accessible from the eastern coast of Koh Tao.

Full Details → Book with Diego
Hin Wong Bay Beginner Peak

Freediving Paradise

2–12m bay Koh Tao & Offshore
Sea Turtles Seahorses Anemonefish Moray Eels +1

A stunning shore-accessible bay on Koh Tao's quiet east coast, famous for resident turtles and calm freediving conditions.

Full Details → Book with Diego
Mango Bay Beginner Peak

Shallow Coral Haven

2–15m bay Koh Tao & Offshore
Juvenile Reef Fish Anemonefish Pipefish Sea Cucumbers

A quiet north-coast bay with healthy coral gardens and abundant juvenile fish, ideal for discovery dives and snorkeling.

Aow Leuk Beginner Peak

Hidden Bay Gem

2–12m bay Koh Tao & Offshore
Triggerfish Anemonefish Parrotfish Sea Cucumbers

A picture-perfect bay with a sandy beach, rocky outcrops, and a coral reef teeming with colorful tropical fish.

Tanote Bay Beginner Peak

Cliff Jumping Meets Freediving

2–18m bay Koh Tao & Offshore
Blacktip Reef Sharks Sea Turtles Barracuda Triggerfish

A dramatic east-coast bay with rocky cliffs, a resident blacktip shark population, and a famous cliff-jumping rock.

Lighthouse Bay Beginner Peak

Navigate by the Light

4–14m bay Koh Tao & Offshore
Anemonefish Pipefish Parrotfish Moray Eels

A quiet northeast bay beneath the old lighthouse, offering relaxed diving with macro critters and healthy coral.

Laem Thian Advanced Peak

Caves of the East Coast

6–20m reef Koh Tao & Offshore
Groupers Blue-spotted Stingrays Nudibranchs Moray Eels

A rocky headland with underwater caves and caverns, popular with adventurous divers seeking overhead environments.

Sairee Reef Beginner Peak

Walk-In Sunset Reef

2–10m reef Koh Tao & Offshore
Seahorses Nudibranchs Porcupinefish Anemonefish

Koh Tao's most accessible dive — wade in from Sairee Beach for a shallow reef rich in macro life.

Ancient Pottery Underwater

3–12m pinnacle Koh Tao & Offshore
Porcupinefish Anemonefish Parrotfish Wrasse

Shallow pinnacles with scattered ancient pottery shards, named for the historic ceramics found among the coral.

Shark Bay Beginner

Baby Sharks at Sunset

2–8m bay Koh Tao & Offshore
Blacktip Reef Sharks Sea Turtles Stingrays

A shallow sandy bay where juvenile blacktip reef sharks and turtles can be spotted from the surface — perfect for snorkeling.

Sai Daeng Intermediate Peak

Red Sand Reef

5–18m bay Koh Tao & Offshore
Sea Turtles Barracuda Anemonefish Angelfish

A beautiful south-coast bay named for its red-tinged sand, with healthy coral and reliable turtle sightings.

Buoyancy World Beginner Peak

Underwater Obstacle Course

8–15m artificial Koh Tao & Offshore
Anemonefish Porcupinefish Moray Eels

A purpose-built underwater obstacle course with hoops, frames, and platforms for buoyancy training.

Junkyard Reef Beginner Peak

Trash to Treasure

5–12m artificial Koh Tao & Offshore
Porcupinefish Moray Eels Scorpionfish Anemonefish

An artificial reef created from cleaned metal structures, now a thriving ecosystem with excellent macro life.

Hin Pee Wee Advanced Peak

Deep Rock Adventure

8–30m pinnacle Koh Tao & Offshore
Barracuda Groupers Trevally Batfish

A deep rocky pinnacle south of Koh Tao with serious big fish action and minimal diver traffic.

No Name Pinnacle Advanced Peak

The Unnamed One

8–26m pinnacle Koh Tao & Offshore
Barracuda Trevally Snappers

A rarely visited deep pinnacle that never got a proper name — but delivers serious fish action for those who find it.

Nang Yuan Pinnacle Intermediate Peak

Nang Yuan's Deep Side

2–18m pinnacle Koh Tao & Offshore
Barracuda Fusiliers Triggerfish Groupers

A submerged pinnacle west of the iconic triple island, offering more depth and bigger fish than the nearby Japanese Gardens.

King Kong Intermediate Peak

The Secret West Coast Bay

5–15m bay Koh Tao & Offshore
Groupers Snappers Moray Eels Nudibranchs

A lesser-known rocky bay on Koh Tao's west coast with interesting boulder formations and relaxed marine life.

Hin Ngam Intermediate Peak

Beautiful Rock Reef

8–20m reef Koh Tao & Offshore
Blue-spotted Stingrays Groupers Nudibranchs Angelfish

A beautiful rocky reef on Koh Tao's east coast with large granite formations and good macro diving.

Aow Mao Beginner Peak

Quiet Southern Bay

5–12m bay Koh Tao & Offshore
Reef Fish Anemonefish Sea Cucumbers

A quiet bay on the south coast used for training dives, with sandy patches and coral bommies.

Lang Khai Bay Beginner Peak

Snorkeling Serenity

3–10m snorkeling Koh Tao & Offshore
Reef Fish Anemonefish Parrotfish

A quiet east-coast bay with a shallow reef perfect for snorkeling and skin diving practice.

Koh Ma Intermediate Peak

Phangan's Island Reef

3–24m island reef Koh Phangan
Sea Turtles Barracuda Reef Sharks Angelfish +1

A small island connected to Koh Phangan by a sandbar at low tide, with excellent snorkeling and diverse reef life dropping to 24m.

Mae Haad Reef Beginner Peak

Shore Diving Koh Phangan

1–14m reef Koh Phangan
Anemonefish Parrotfish Sea Cucumbers Porcupinefish

An easily accessible reef at Mae Haad beach with coral gardens right from the shore.

Haad Yao Reef Beginner Peak

Long Beach Coral Garden

1–12m reef Koh Phangan
Anemonefish Parrotfish Triggerfish Wrasse

A reef running along Haad Yao's beautiful long beach, perfect for casual snorkeling sessions.

Haad Salad Reef Beginner Peak

Salad Beach Snorkeling

1–14m reef Koh Phangan
Anemonefish Pufferfish Parrotfish Sea Cucumbers

A pleasant reef off the quiet Haad Salad beach with coral patches and abundant reef fish.

Chaloklum Bay Beginner Peak

Fishing Village Bay

1–10m bay Koh Phangan
Squid Pipefish Juvenile Reef Fish Sea Cucumbers

A wide bay fronting a fishing village, good for mellow snorkeling and night diving for squid.

Rock Point / Kong Yai Intermediate Peak

Phangan's Deep Rock

5–20m pinnacle Koh Phangan
Barracuda Groupers Snappers Triggerfish

A rocky pinnacle off Koh Phangan's west coast offering the island's best deeper diving with schooling fish.

Laem Chua Intermediate Peak

Rocky Cape Reef

3–18m reef Koh Phangan
Groupers Blue-spotted Stingrays Moray Eels Nudibranchs

A rocky cape on Koh Phangan's southwest coast with boulder formations and good reef fish diversity.

Laem Tian Intermediate Peak

East Coast Explorer

3–18m reef Koh Phangan
Groupers Snappers Cuttlefish Nudibranchs

A rocky point on Koh Phangan's east coast with good reef structure and less-visited underwater terrain.

Haad Khom (Coral Bay) Beginner Peak

Phangan's Coral Bay

1–8m snorkeling Koh Phangan
Anemonefish Parrotfish Butterfly Fish

A small north-coast bay with shallow coral gardens ideal for snorkeling and skin diving.

Than Sadet Reef Beginner Peak

Royal Waterfall Beach Reef

1–6m snorkeling Koh Phangan
Reef Fish Anemonefish

A small reef near the famous royal waterfall beach, combining above-water hiking with below-water exploration.

Bottle Beach Reef Beginner Peak

Secluded Beach Snorkeling

1–6m snorkeling Koh Phangan
Reef Fish Anemonefish Starfish

A famously secluded beach accessible only by boat or jungle hike, with a small reef for casual snorkeling.

Koh Tan Beginner Peak

Samui's Snorkeling Island

1–8m island reef Koh Samui & Nearby
Sea Turtles Anemonefish Parrotfish Porcupinefish +1

A charming uninhabited island just 15 minutes south of Koh Samui with coral reefs, turtles, and zero crowds.

Full Details → Book with Diego
Koh Madsum (Pig Island) Beginner Peak

Pigs & Snorkeling

1–5m snorkeling Koh Samui & Nearby
Reef Fish Anemonefish Starfish

A tiny island famous for its friendly beach pigs, with shallow snorkeling in the channel toward Koh Tan.

Full Details → Book with Diego
Hin Ngam (Samui) Intermediate Peak

Samui's Reef Secret

5–18m reef Koh Samui & Nearby
Groupers Barracuda Nudibranchs Moray Eels

A rocky reef off Koh Samui's coast offering the closest proper diving without taking a boat to the islands.

Koh Yippon Lek / Hin Yippon Beginner Signature Peak

Ang Thong's Best Reef

3–18m island reef Ang Thong Marine Park
Sea Turtles Barracuda Groupers Reef Fish +1

The signature dive site of Ang Thong Marine Park, with excellent coral coverage and the park's most diverse marine life.

Full Details → Book with Diego
Koh Yippon Yai Beginner Peak

Big Japanese Island

3–18m island reef Ang Thong Marine Park
Groupers Snappers Nudibranchs Anemonefish

The larger sister island to Koh Yippon Lek, with a similar reef system and dramatic limestone scenery above water.

Full Details → Book with Diego
Koh Wao Beginner Peak

Clear Water Paradise

1–15m reef Ang Thong Marine Park
Reef Fish Sea Turtles Anemonefish Parrotfish

An island in the Ang Thong group with excellent visibility and a shallow reef popular with snorkeling tours.

Full Details → Book with Diego
Koh Sam Sao Beginner Peak

Three Pillars Island

1–10m snorkeling Ang Thong Marine Park
Reef Fish Starfish Sea Cucumbers

An island known for its natural stone arch and shallow snorkeling waters in the Ang Thong archipelago.

Koh Hin Dap Beginner Peak

Rocky Island Snorkeling

1–10m snorkeling Ang Thong Marine Park
Reef Fish Anemonefish Sea Cucumbers

A small rocky island in the Ang Thong group with shallow reef patches and calm snorkeling.

Koh Tai Plao Beginner Peak

Ang Thong Outpost

1–10m reef Ang Thong Marine Park
Reef Fish Anemonefish Parrotfish

A quiet island in the southern part of Ang Thong with a simple reef and peaceful snorkeling.

Koh Wua Ta Lap Beginner Peak

Park Headquarters Island

1–8m snorkeling Ang Thong Marine Park
Reef Fish Starfish Sea Cucumbers

The main island of Ang Thong Marine Park with the park headquarters, a famous viewpoint, and basic snorkeling off the beach.

Koh Phaluai Beginner Peak

Ang Thong's Largest Island

1–10m reef Ang Thong Marine Park
Reef Fish Sea Cucumbers Parrotfish

The largest island in the Ang Thong group with a small fishing community and fringing reef for snorkeling.

Koh Ngam Yai Beginner Peak

Chumphon's Crown Jewel

5–16m island reef Chumphon
Sea Turtles Barracuda Groupers Reef Fish +1

The premier snorkeling and diving destination off Chumphon, with stunning visibility and healthy reefs largely untouched by mass tourism.

Koh Ngam Noi Beginner Peak

Little Sister Island

5–16m island reef Chumphon
Barracuda Groupers Anemonefish Nudibranchs

The smaller companion island to Koh Ngam Yai, with equally impressive reefs and even fewer visitors.

HTMS Prab 741 Advanced Peak

WWII Warship in the Gulf

18–24m wreck Chumphon
Batfish Groupers Barracuda Lionfish

A WWII-era Thai Navy vessel sunk as an artificial reef near Koh Ngam Yai — one of the most historically significant wrecks in the Gulf.

Hin Pae / Hin Lak Ngam Advanced Peak

Chumphon's Deep Pinnacle

5–25m pinnacle Chumphon
Barracuda Groupers Trevally Batfish

A submerged pinnacle near the Koh Ngam islands with deep walls and impressive pelagic fish encounters.

Koh Lak Ngam Beginner Peak

Hidden Island Reef

5–20m reef Chumphon
Reef Fish Groupers Nudibranchs

A small island in the Chumphon group with a healthy fringing reef and very few divers.

Sam Laem Advanced Peak

Three Points Deep

10–30m pinnacle Chumphon
Barracuda Trevally Groupers

A deep offshore pinnacle system named for the three rocky points, offering challenging diving with big fish rewards.

Koh Talu (Chumphon] Beginner Peak

Tunnel Island

5–15m island reef Chumphon
Reef Fish Anemonefish Parrotfish

An island with a natural tunnel through the rock and surrounding reefs for easy diving and snorkeling.

Koh Mattra Beginner Peak

Chumphon's Beach Island

3–10m snorkeling Chumphon
Reef Fish Starfish Sea Cucumbers

A small island near the Chumphon coast with a sandy beach and simple snorkeling.

Koh Langka Jew Beginner Peak

Lanka's Little Isle

3–12m island reef Chumphon
Reef Fish Anemonefish Sea Cucumbers

A small island near the Chumphon coast with a fringing reef and calm snorkeling waters.

Koh Kalok (Skull Island] Beginner Peak

Skull Island

5–15m island reef Chumphon
Groupers Reef Fish Anemonefish

Named for its skull-like rock formation, this island offers decent reef diving and a dramatic topside appearance.

Koh Samet (Chumphon] Beginner Peak

Chumphon Coast Retreat

3–12m island reef Chumphon
Reef Fish Parrotfish Anemonefish

A coastal island near Chumphon with basic snorkeling and a pleasant beach.

Koh Rang (Chumphon) Beginner Peak

Chumphon's Outer Island

5–15m island reef Chumphon
Reef Fish Groupers Anemonefish

An outer island in the Chumphon archipelago with untouched reefs and almost no diver traffic.

Koh Lak Raet Beginner Peak

Off the Radar

5–15m island reef Chumphon
Reef Fish Nudibranchs Groupers

A small island in the Chumphon group with healthy reef and minimal tourist impact.

Koh Khai (Chumphon) Beginner Peak

Egg Island Snorkeling

3–10m snorkeling Chumphon
Reef Fish Anemonefish

A small, egg-shaped island near Chumphon with calm waters and basic snorkeling.

Koh Ran Ped & Koh Ran Kai Intermediate Peak

Duck & Chicken Islands

5–15m island reef Chumphon
Barracuda Groupers Reef Fish

A pair of small islands named "Duck" and "Chicken" with reef systems that attract schooling fish.

Koh Larn Intermediate

Pattaya's Island Escape

3–22m island reef Pattaya & Sattahip
Barracuda Groupers Nudibranchs Seahorses

The largest island off Pattaya with multiple dive sites around its coastline, from shallow coral to deeper walls.

Koh Sak Beginner

Horseshoe Island

3–30m reef Pattaya & Sattahip
Reef Fish Nudibranchs Moray Eels Seahorses

A horseshoe-shaped island with a sheltered bay and reef slopes dropping to 30m on the outer walls.

Koh Krok Beginner

Tiny Island Charm

3–12m reef Pattaya & Sattahip
Anemonefish Parrotfish Reef Fish

A tiny island near Koh Larn with a simple reef and calm snorkeling conditions.

HTMS Khram Advanced Signature

The Big Navy Wreck

15–30m wreck Pattaya & Sattahip
Batfish Barracuda Groupers Lionfish +1

A 56-meter decommissioned US Navy LSM sunk in 2003, one of the Pattaya area's signature wreck dives with excellent marine colonization.

HTMS Kut Advanced

Sister Ship Down

14–30m wreck Pattaya & Sattahip
Batfish Groupers Lionfish Barracuda

A 56m former US Navy LSM sunk in 2006, the sister wreck to HTMS Khram with equally impressive marine life.

HTMS Mataphon Intermediate

Shallow Wreck Explorer

12–23m wreck Pattaya & Sattahip
Groupers Lionfish Porcupinefish Nudibranchs

A shallower wreck dive near Pattaya, accessible to intermediate divers and offering good macro life on the hull.

Koh Rin Beginner

Pattaya's Best Reef

5–22m reef Pattaya & Sattahip
Sea Turtles Barracuda Groupers Triggerfish

Often rated as Pattaya's best natural reef site, with healthy corals and regular turtle sightings.

Bamboo Island Reef

3–26m reef Pattaya & Sattahip
Barracuda Groupers Reef Fish Nudibranchs

A beautiful island in the Pattaya outer islands with good reef diving and the nearby HTMS Khram wreck.

Koh Man Wichai Advanced

The Vertical Wall

8–25m wall Pattaya & Sattahip
Barracuda Trevally Groupers Soft Corals

A dramatic vertical wall dive off the outer islands, offering Pattaya's most exciting underwater terrain.

SS Suddhadib / Hardeep Advanced Signature

WWII Combat Wreck

26–28m wreck Pattaya & Sattahip
Groupers Barracuda Lionfish Soft Corals

A genuine WWII combat wreck — a cargo ship bombed and sunk by Japanese aircraft in 1942, now one of the Gulf's most historically significant dives.

Koh Khram Yai & Noi Intermediate

Military Island Reefs

4–30m reef Pattaya & Sattahip
Sea Turtles Barracuda Reef Fish Nudibranchs

Military-controlled islands with restricted access that has preserved excellent reef systems.

Hin Yai Advanced

Pattaya's Deep Pinnacle

15–30m pinnacle Pattaya & Sattahip
Barracuda Trevally Groupers

A deep submerged pinnacle in outer Pattaya waters, visited by experienced divers seeking pelagic encounters.

Koh Samae San Cluster Intermediate

Military Island Diving

5–28m reef Samae San
Seahorses Nudibranchs Groupers Barracuda +1

A military-controlled island cluster with some of the best visibility in the upper Gulf and pristine reef systems.

Shark Fin Pinnacle

5–20m pinnacle Samae San
Barracuda Groupers Nudibranchs Sea Fans

A fin-shaped rock breaking the surface with a reef dropping to 20m, named for its resemblance to a shark fin.

Samaesan Hole Technical

The Abyss

85–100m pinnacle Samae San
Deep-water species

A legendary 85–100m deep sinkhole in the Gulf of Thailand — one of Southeast Asia's most extreme technical diving sites.

The New Twins

12–30m wreck Samae San
Batfish Groupers Lionfish Fusiliers

Two torpedo boats sunk in September 2024, the newest wreck dive sites in the Gulf of Thailand.

HTMS Chang Advanced Signature Peak

Thailand's Biggest Wreck

3–32m wreck Koh Chang & Koh Rang
Batfish Barracuda Groupers Lionfish +1

A massive 100-meter Thai Navy landing ship sunk in 2012 — the biggest diveable wreck in the Gulf of Thailand.

Hin Luk Bat Beginner Peak

Koh Chang's Pinnacle

3–22m pinnacle Koh Chang & Koh Rang
Barracuda Snappers Nudibranchs Anemonefish

A rocky pinnacle near the HTMS Chang wreck with good coral coverage and schooling fish.

Hin Rap Beginner Peak

Flat Rock Reef

3–18m reef Koh Chang & Koh Rang
Reef Fish Nudibranchs Moray Eels

A flat rocky reef with easy diving conditions and a variety of reef fish and macro critters.

Blueberry Hill

5–18m reef Koh Chang & Koh Rang
Blue-spotted Stingrays Groupers Nudibranchs Reef Fish

Named for the blue-spotted stingrays that frequent this reef, a reliable site for ray encounters and macro diving.

Banana Shaped Rock

5–18m reef Koh Chang & Koh Rang
Reef Fish Nudibranchs Porcupinefish

A banana-shaped rocky reef with easy diving conditions and healthy coral gardens.

Saam Sao Hin Beginner Peak

Three Stone Pillars

5–18m reef Koh Chang & Koh Rang
Groupers Snappers Nudibranchs

Three rocky pillars rising from the seabed creating swim-throughs and interesting terrain.

Koh Chang's Best Dive

15–30m pinnacle Koh Chang & Koh Rang
Barracuda Trevally Groupers Soft Corals +1

The premier dive site in the Koh Chang archipelago — a deep pinnacle in Koh Rang Marine Park with big fish and spectacular soft corals.

Koh Yak & Koh Laun Beginner Peak

Easy Island Reefs

5–12m reef Koh Chang & Koh Rang
Anemonefish Parrotfish Reef Fish

Two small islands with shallow reefs suitable for snorkeling and beginner dives.

Koh Thain West Beginner Peak

West Side Reef

8–18m reef Koh Chang & Koh Rang
Groupers Snappers Nudibranchs Moray Eels

The western reef of Koh Thain island with rocky formations and reliable marine life.

Three Finger Formation

10–16m reef Koh Chang & Koh Rang
Snappers Fusiliers Nudibranchs

A reef formation with three finger-like ridges extending from a central point, creating an unusual diving terrain.

Koh Tun Beginner Peak

Quiet Island Reef

8–18m reef Koh Chang & Koh Rang
Reef Fish Groupers Nudibranchs

A small island with a basic reef offering quiet diving away from the more popular sites.

Koh Wai Beginner Peak

Paradise Island Snorkeling

3–10m snorkeling Koh Chang & Koh Rang
Reef Fish Anemonefish Starfish

A tiny paradise island with crystal-clear water and a shallow reef perfect for snorkeling and beach time.

Koh Rang Beginner

Marine Park Jewel

5–20m island reef Koh Chang & Koh Rang
Sea Turtles Reef Fish Barracuda Nudibranchs

The main island of Koh Rang Marine Park with protected reefs, turtles, and the best visibility in the Koh Chang area.

Koh Klum Beginner

Outer Reef Explorer

5–18m island reef Koh Chang & Koh Rang
Reef Fish Groupers Anemonefish

An outer island near Koh Rang with decent reef diving and peaceful conditions.

Koh Raet Beginner

Underwater Sculpture Park

4–14m island reef Koh Kood
Reef Fish Coral Nudibranchs

Koh Kood's most popular dive/snorkel site featuring an underwater sculpture park and healthy reef.

Ao Tum Beginner

Coral Garden & Boulders

5–14m reef Koh Kood
Hard Corals Reef Fish Groupers

A beautiful coral garden with large boulders and abundant fish life off Koh Kood.

Hin Loy Intermediate

Caves, Swim-throughs & Nudibranchs

4–16m pinnacle Koh Kood
Nudibranchs Reef Fish Shrimp Crabs

A rock pinnacle with caves, swim-throughs, and one of the best nudibranch diversities near Koh Kood.

Hin Yedhi Beginner

Koh Kood Rock Reef

4–14m reef Koh Kood
Reef Fish Coral

A rock reef near Koh Kood with decent coral coverage and typical Gulf fish life.

Resort Island Reef

6–16m island reef Hua Hin & Prachuap
Staghorn Coral Anemones Turtle Nesting Rabbit Sea Slugs

A charming resort island with an SSI dive center, healthy house reef, and seasonal turtle nesting. Visibility can be poor but reef health is impressive.

Koh Sing Intermediate

Small Island West of Koh Talu

5–20m reef Hua Hin & Prachuap
Staghorn Coral Reef Fish

A small island west of Koh Talu with staghorn coral fields.

Koh Sang (Koh Sarang) Intermediate

Wall Drift Dive

5–20m wall Hua Hin & Prachuap
Soft Corals Staghorn Coral Reef Fish

An island featuring an awesome wall drift dive with beds of leafy soft corals in pink and purple.

Koh Kra Archipelago Advanced Peak

Highest Coral Diversity in the Gulf

5–30m island reef Remote South (Koh Kra & Koh Losin)
Hawksbill Turtles Green Turtles Blacktip Sharks Manta Rays +1

An extremely remote archipelago 54km offshore with 67 species of hard coral — the highest diversity in the entire Gulf of Thailand. Liveaboard access only.

Koh Losin Advanced Signature

Thailand's Most Remote Dive Site

5–36m pinnacle Remote South (Koh Kra & Koh Losin)
Whale Sharks Manta Rays Blacktip Sharks Hard Corals

A tiny mid-ocean pinnacle 80 nautical miles offshore — Thailand's smallest island and furthest from coast. Frequent whale sharks and mantas. One of the healthiest reef ecosystems in the Gulf.

Khanom Coast Beginner Peak

Pink Dolphin Watching

1–6m snorkeling Remote South (Koh Kra & Koh Losin)
Pink Dolphins Indo-Pacific Humpback Dolphins Reef Fish

Home to approximately 50 Indo-Pacific humpback dolphins (pink dolphins). Best seen before 8am at Laem Prathab and Ao Kwang Phao.

Hin Sampayu Beginner

Closest Diving to Bangkok

3–16m reef Koh Sichang
Anemonefish Pipefish Nudibranchs Stingrays

The closest diveable location to Bangkok, featuring purple anemone fields at 5m and decent macro life.

Coral Restoration Project

3–10m artificial Koh Sichang
Staghorn Coral Disk Corals Reef Fish

A DMCR coral gardening project with cinderblock nurseries supporting approximately 48,000 restored coral colonies.

Central Gulf Deep Pinnacles

3–30m pinnacle Open Water / Offshore
Barracuda Turtles Nudibranchs Whale Sharks (rare) +1

Twin underwater pinnacles in the central Gulf with big wall reef, anemone gardens, and occasional whale shark sightings.

Explore These Sites With Us

We run freediving trips to the best sites near Koh Samui — Sail Rock, Chumphon Pinnacle, Ang Thong, and more. Maximum 3 students per trip.

This is the most comprehensive dive site directory for the Gulf of Thailand, covering 115 sites across 13 regions. Data compiled from 50+ sources including PADI, SSI, local dive operators, Thai Wreck Diver GPS database, and DMCR.

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