Liveaboard Diving in Thailand — Routes, Costs, Operators & How to Choose
A liveaboard trip in the Andaman Sea is the definitive Thailand diving experience. Living aboard a dive boat for 2–5 nights gives you access to the best sites in the Similans, Richelieu Rock, Koh Bon, and — on extended itineraries — Hin Daeng, the Surin Islands, and the Burma Banks. These sites are unreachable by day trip from the mainland, and the concentrated diving (3–4 dives per day) means you see far more than any land-based itinerary can deliver.
Thailand's liveaboard industry is mature and competitive, with boats ranging from budget shared-berth vessels at $120/night to premium operations with private cabins, photography facilities, and gourmet dining at $300+/night. The variety means there's a liveaboard for every budget and diving style. This guide covers routes, operators, costs, and practical advice for choosing the right trip.
Dive Profile
5–40m+ (site-dependent)
26–29°C
15–30m (Similans average)
Variable by site
Boat (giant stride from liveaboard)
Open Water to Advanced (route-dependent)
Overview
Standard liveaboard routes from Thailand:
Route 1 — Similan Classic (2 nights): Budget-friendly introduction. Covers Similan Islands 4–9 with 7–8 dives. Does not reach Koh Bon, Koh Tachai, or Richelieu Rock. Departs Khao Lak (Tab Lamu pier). Cost: $240–360.
Route 2 — Similan + Richelieu (4 nights): The most popular itinerary. Covers all Similan Islands, Koh Bon (manta station), Koh Tachai, and Richelieu Rock. 14–16 dives. Departs Khao Lak. This is the itinerary most divers should book. Cost: $600–1,000 (standard), $1,000–1,500 (premium).
Route 3 — Extended Andaman (5–7 nights): Premium itineraries adding the Surin Islands, Burma Banks, and sometimes Hin Daeng/Hin Muang on a southern extension. 18–25 dives. Some depart from Phuket. Cost: $1,200–2,500+.
Route 4 — Southern Andaman: Less common route covering Koh Haa, Hin Daeng, Hin Muang, and Phi Phi. Departs Phuket. Available from select operators. Cost varies.
Choosing a liveaboard — what matters:
Boat condition and maintenance: This is the #1 safety factor. Inspect photos of the engine room and compressor area, not just the sundeck. Ask about last refit date.
Crew-to-guest ratio: Better boats have more divemasters per guest, meaning smaller groups underwater. Premium boats: 1 DM per 4 guests. Budget boats: 1 per 8–10.
Cabin types: Budget boats offer shared berths (dormitory-style). Mid-range: twin/double cabins with shared bathroom. Premium: en-suite cabins with climate control. Solo supplements apply on most boats (50–100% of cabin price).
Food quality: You'll eat all meals aboard. Budget boats: adequate but basic. Premium boats: excellent, with fresh fish, multiple courses, and dietary accommodation.
Dive equipment: Most boats include standard gear in the price. Photography stations (charging, rinsing, workspace) are a premium feature. Nitrox availability varies — confirm before booking.
Safety equipment: O2 kit, first aid, DAN emergency action plan, VHF radio, life rafts. All licensed boats carry these — but verify. Ask about the crew's emergency training.
Top operators from Khao Lak: - Similan Diving Safaris: Long-established, own fleet, consistent quality - Wicked Diving: Eco-focused, smaller boats, photography-friendly - Various other operators with boats ranging from budget to premium
Packing list essentials: - Certification card and logbook - Dive computer (rental available but own is better) - Reef-safe sunscreen - Motion sickness medication (even experienced sailors can be affected) - Torch/flashlight for night dives - Dry bag for electronics - Cash for crew tips (standard: 1,500–3,000 THB per trip)
Who Is This For
Any diver who wants to experience the best of Thailand's Andaman Sea. Open Water divers can join standard Similan routes (many east-side sites are suitable). Advanced divers get the most from Richelieu Rock and Koh Bon. Photography enthusiasts benefit from multiple dives at the same site. Budget divers find the 2-night classic good value. Luxury seekers have premium options with private cabins and concierge service.
Best Season
November–May. Liveaboards do not operate during the monsoon (June–October). Peak season: January–April (best visibility, calmest seas, manta season at Koh Bon). Book 2–3 months ahead for peak season dates on popular boats. Early season (November–December) offers good diving with easier availability and sometimes lower prices.
Safety Notes
Choose reputable operators with documented safety records. Verify: O2 kits, first aid, DAN emergency plan, communication equipment, life rafts, fire extinguishers. Ask about crew certifications and emergency drill frequency. The nearest hyperbaric chamber is on Phuket — ensure the operator has a clear evacuation procedure. Purchase dive insurance (DAN or equivalent) before any liveaboard trip. Motion sickness can affect anyone — bring medication and take it before departure.
Frequently Asked Questions
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