Pattaya Dive Sites: Best Spots, Wrecks and Season Guide

Featured image: [https://www.flickr.com/people/91241612@N00 J�r�me Bon] from Paris, France, CC BY 2.0, via Wikimedia Commons.

Pattaya Dive Sites at a Glance

Boat times and depths below come from operator-published information and vary by boat and day. Ask your operator for exact figures before you pay a deposit.

Near Islands: Koh Larn and Koh Sak

Koh Larn and Koh Sak are the beginner-friendly pair. Gentle reef slopes and manageable conditions make them the usual choice for Discover Scuba, which needs no prior certification. Commonly reported sightings include blue-spotted stingrays on sandy patches, moray eels in rocky crevices, pufferfish and angelfish. Seahorses and nudibranchs turn up for divers who search reef edges slowly. Snorkelers often share these boats, and our Koh Larn snorkeling guide covers the surface option. Mixed groups can also compare snorkeling trips from Pattaya. Not every stop suits snorkelers, so ask which site the boat is visiting that day.

Far Islands: Koh Rin, Koh Phai and Koh Manwichai

Koh Rin and Koh Phai sit further offshore. Expect a longer boat ride, slightly deeper profiles and denser fish life than the near islands. Schools of barracuda, trevally, batfish and snapper are commonly reported, along with giant groupers under ledges. Koh Manwichai lies north of Koh Rin and takes about 55 minutes to reach, according to operator reports. Average depth is about 14 m and maximum depth about 22 m. Its three areas behave differently.

• Fingers: rocky ridges with soft coral and sea whips. A descent to about 18 m reaches the tips. Stingrays, groupers, puffers and bamboo sharks are commonly reported.
• Wall: a wall that bottoms out at about 14 m. Surge can build near the surface. Turtles and nudibranchs are commonly reported.
• Drop-off: a sloping bank of rock and coral down to about 22 m. Current can sweep divers around the island, which makes it a drift dive. Bamboo sharks and blacktips are commonly reported.

Samae San Islands: Koh Chuang, Koh Chan and Shark Fin Rock

Daily boats run to the Samae San group from Pattaya and from the Samae San area itself. Ask which pier your booking uses, because it changes your pickup time. Koh Chuang is popular for macro life such as shrimp gobies and nudibranchs. Koh Chan has artificial reef structures that attract schools of fish and larger groupers. Shark Fin Rock is a rocky pinnacle where barracuda, trevally and batfish are commonly seen circling. Turtles are reported across the group.

Pattaya Wreck Dives

Operators list four decommissioned naval vessels: HTMS Khram, HTMS Kut, HTMS Mataphon and HTMS T11. Some also mention the Hardeep wreck near Samae San. Wrecks sit deeper than the near-island reefs, so most operators expect Open Water certification at minimum and often prefer Advanced. Ask for the exact depth of each wreck before you commit. Penetration is a separate skill, and the PADI Wreck Diver specialty outlines the training behind it. Details on each hull are in our Pattaya wreck diving guide. In green season, wrecks are less affected by surface weather than shallow reefs.

Marine Life by Site

Sightings below are commonly reported, never guaranteed. Near islands lean toward macro life and reef residents such as stingrays, morays and seahorses. Far islands add larger schools and groupers. Koh Manwichai adds bamboo sharks and occasional blacktips. Koh Chuang suits macro photographers, while Shark Fin Rock suits those who prefer schooling fish. Wrecks concentrate barracuda, batfish and lionfish around hull openings. Large shark encounters are rare, and stories of whale sharks or dolphins at Koh Manwichai should not shape your plans.

Best Time to Dive and Real Visibility

Diving runs all year. November to April is generally the clearest period, with visibility often 8–15 m and calmer seas. May to October brings short tropical rains and visibility of about 5–10 m. Across the whole year, operators quote 5–15 m, so treat any single figure with caution. Water stays around 28–30°C, and our Pattaya water temperature guide breaks that down by month. Koh Manwichai is quoted at 10–30 m, but one operator lists its best conditions as July–August or November–January. Another general guide says November–April, so ask what the boat has seen that week. In rough or murky months, favor wrecks and sheltered near islands over exposed sites.

Costs, Boat Time and Getting There

Prices and hours checked November 2026, using operator-published rates. Discover Scuba runs about ฿2,500–3,500. Certified fun diving costs about ฿2,000–3,500 for a two-dive trip. Most trips last 4–6 hours with two dives, leaving in the morning and returning early afternoon. Gear is usually included for Discover Scuba and fun dives, but check what your package covers. Children can start entry-level programs from around 10 years old. Compare operators in our Pattaya dive center guide. Training options are in our PADI Pattaya overview.

• Half-day: near islands, shorter crossing, easier for beginners and families.
• Full-day: far islands or Samae San, more crossing time, better for certified divers.
• Weekend visitors from Bangkok can reach several sites in a day, according to operators. Confirm pickup points for Pattaya and Jomtien.

How to Choose a Site (and a Dive Center)

Start with your certification and comfort, then pick the site. Our Pattaya diving hub covers the wider picture. Divers with medical conditions should complete a questionnaire first, and Divers Alert Network is a standard reference for dive medicine. To vet operators, the SSI dive center locator is one place to start.

• First-timers: Koh Larn or Koh Sak with Discover Scuba.
• Open Water divers: Koh Larn, Koh Sak, or Koh Rin with a guide.
• Advanced divers: Koh Manwichai Drop-off, Shark Fin Rock, or the wrecks.
• Macro fans: Koh Chuang.
• Mistakes to avoid: trusting the first visibility figure you read.
• Mistakes to avoid: booking a deep wreck without the right certification.
• Mistakes to avoid: assuming snorkelers can join every site.
• Mistakes to avoid: ignoring current at Koh Manwichai.
• Skip Pattaya if you want clear-water tropical reef diving.