Wreck Diving in Thailand: Best Wrecks by Level & Region

Featured image (a diver on a wreck in Guam, shown for illustration): COMSEVENTHFLT, CC BY-SA 2.0, via Wikimedia Commons.

Where to Go Wreck Diving in Thailand

Pattaya and Samae San have the widest range of wrecks, from a 20 m artificial reef to a 30 m navy ship. Koh Chang adds a shallow patrol boat and a deep frigate. Near Phi Phi and Koh Lanta, wrecks sit on day-trip routes and reach about 30 m at their deepest points. Depths below are operator-stated, so expect small differences between boats. Prices and hours checked November 2026.

Thailand's Wrecks by Diver Level

Depth matters more than any best-wreck ranking. Under standard PADI limits, Open Water divers go to 18 m and Advanced divers to 30 m. Anything deeper needs deep or technical training. We'd pick the wreck from your certification first, then choose the region. Our 8 Best Dive Sites in Thailand by Coast and Season page covers reef alternatives when a wreck is out of your range.

Pattaya and Samae San Wrecks

Pattaya is our pick for a first wreck trip. HTMS Mataphon is listed as a beginner dive at 20 m. T94 and T95 and the Bremen suit intermediate divers at 20 m and 22 m. Hardeep (26 m) and HTMS Kut (30 m) are for Advanced divers. Local operators list water at 28-30 °C and visibility of 5-15 m. Pattaya is also close enough to Bangkok for a weekend. Compare it with other bases in our Gulf of Thailand diving guide.

Koh Chang Wrecks

Koh Chang gives you two very different wrecks. T11 is a small patrol boat at about 18 m, which makes it a sensible first wreck. Phutthayotfa Chulalok is a 134 m frigate lying around 40 m deep. Only Advanced and technical divers should book it. A rarer deep wreck, Koho Maru 5, also lies near the island and is technical territory. We'd choose Koh Chang if you want wrecks mixed with marine park reefs and are happy with a longer trip from the mainland.

Phi Phi, Koh Lanta and Koh Waen Wrecks

King Cruiser and Kled Gaeow lie near the Phi Phi Islands. Operators put their deepest points within 30 m. Both are covered in marine life, according to Koh Lanta dive centers. South of Lanta, Koh Waen is known for its underwater train station. We like this side of Thailand for divers who want wrecks and reefs in one trip. Our Andaman Sea diving guide covers the reef options.

Technical Gulf Wrecks: What Recreational Divers Should Know

Further out in the Gulf, expedition teams have dived WWII Japanese freighters, the US submarine USS Lagarto and the drill ship Seacrest. Seacrest lies upside down in about 260 ft of water. These are offshore, deep and far beyond recreational limits. Treat them as history, not a trip option. If the idea appeals, start with our technical diving in Thailand page. Agencies such as TDI publish technical wreck courses for the training path.

Wreck Diver Course: What It Covers and When to Take It

A non-penetration wreck course teaches you to dive around and above wrecks. Expect risk awareness, safety considerations and conservation. One Koh Lanta operator runs it in 1 day with 2 open water dives. Entry needs Open Water level, with a minimum age of 10 (SSI) or 12 (IANTD). The PADI Wreck Diver specialty follows a similar path. The course adds skills but no extra depth allowance. You still dive to your current certification limit. It also does not allow penetration. Going inside needs separate technical training and gear. We'd take it before a Pattaya or Koh Chang trip, or on day one, so every later wreck dive benefits.

Best Season and Conditions

Pattaya operators list November to April as the best window, with generally calm seas and visibility of 5-15 m. Wreck visibility changes with plankton and surge, so expect softer light than on a clear reef. Andaman timing differs from the Gulf because the monsoon hits each coast in different months. We'd check dates with your operator before booking a wreck trip.

Costs, Park Fees and What to Budget

A Koh Lanta operator lists its Wreck Diver course at ฿6,000. Equipment, course material and certification are included. The national park fee is extra at ฿600 per day for foreigners and ฿240 for Thai nationals. The Department of National Parks sets park rules. Other cost drivers are boat distance, nitrox and a deep specialty for the deeper wrecks. See our Cost of Diving in Thailand: Dives, Courses and Trips breakdown for typical day rates.

Getting There and Where to Base

For Pattaya wrecks, base in Pattaya. Day boats leave from Bali Hai Pier, according to local operators. For Koh Chang, Phi Phi and Lanta, ask your operator for the current pier and transfer time. Our Thailand dive resorts page lists places to stay. We also cover multi-stop routes in our dive trip planning guide. For other gulf bases, see Hua Hin Diving: Day Trips, Seasons & Alternatives.

Wreck Diving Rules and Mistakes to Avoid

Treat every wreck as a heritage site and a possible war grave. Take nothing, and keep fins and hands off the structure to limit silt. Watch for nets and fishing line, especially on deeper Gulf wrecks. Ask for a wreck briefing and agree a gas plan. For medical and insurance questions, Divers Alert Network is the place to start. Four mistakes we see most often are listed below.

• Booking a 30 m wreck without Advanced certification.
• Assuming every wreck can be entered.
• Ignoring monsoon timing for the sea you chose.
• Forgetting pier distance and transfer time.