Kon-Tiki Krabi, Fast Manta Diving Krabi, Railay Dive Center and Krabi Scuba Club — the real PADI centers behind Ao Nang and Railay's diving scene, with pricing, Phi Phi trips and the best time of year to go.
Krabi's Andaman coast is one of Thailand's best diving bases precisely because it sits so close to the Phi Phi Islands — most operators profiled here run daily boats out to Phi Phi's dive sites without requiring divers to change accommodation. Three of the four dive centers below are based in Ao Nang, the main beach hub with the widest choice of rentals and services; the fourth, Railay Dive Center, is based directly on Railay, the boat-only peninsula famous for rock climbing. Trips also head to the closer Ao Nang Archipelago — a 13-island cluster with macro life — and, on some operators' schedules, the King Cruiser wreck, Shark Point and Anemone Reef off Phuket. For getting around and where to stay, see the Krabi island hopping guide and Krabi areas guide.
Ao Nang — 873 Ao Nang, Muang Krabi 81000 · Phi Phi 2-dive trip THB 4,000 · Ao Nang Archipelago 2-dive/3-dive THB 3,300/4,100 · King Cruiser/Shark Point/Anemone Reef special trips THB 4,000-4,800
A long-established PADI 5-Star Dive Center in Ao Nang running its own boat trips to the Phi Phi Islands, the 13-island Ao Nang Archipelago and, on scheduled special dates, the King Cruiser wreck, Shark Point and Anemone Reef sites off Phuket. Kon-Tiki covers the full PADI ladder from single-day Discover Scuba experiences through Divemaster and technical education, plus guided and independent snorkeling on the same boats for non-divers in a group.
Best for: Divers and mixed dive/snorkel groups who want an established Ao Nang operator with a genuinely diverse trip schedule.
Ao Nang Beach Front, Krabi · Ao Nang local islands (2 dives) THB 3,500 · Phi Phi Islands (2 dives) THB 4,500 · Open Water course THB 15,900 · Discover Scuba Diving (Ao Nang) THB 4,500
A PADI 5-Star Instructor Development Center and the first and only authorised PADI Freediver Center and PADI Eco Center in Ao Nang, running a custom-made catamaran speedboat and an upgraded traditional longtail to the Phi Phi Islands and Ao Nang's local reefs. Fast Manta's multilingual team (Finnish, Swedish, Norwegian, Italian, Thai, Afrikaans, French, Dutch and English) partners with Shark Guardian and Coralyfe on shark and coral conservation courses, and publishes a full, itemized THB price list covering diving, freediving, snorkeling and PADI Pro courses.
Best for: Freedivers, conservation-minded divers, and anyone who wants transparent published pricing before booking.
Railay Beach — 625/42 Moo 2, T. Ao Nang, M. Krabi 81180 · PADI courses, fun diving, liveaboards & snorkeling — contact for current rates; free Ao Nang hotel pickup included
An official PADI Tec/Rec dive center based directly on Railay Beach — the boat-only peninsula reachable only by longtail — running daily fun-dive, course and snorkeling trips year-round, including in low season, to sites around Krabi, Ao Nang, Phi Phi and, for liveaboard trips, the Similan Islands further north. Railay Dive Center offers free hotel pickup from the Ao Nang area for divers not staying on Railay itself, plus equipment hire and multilingual instruction (English, Thai and Finnish).
Best for: Divers actually based on Railay or Tonsai, or anyone wanting technical (Tec/Rec) diving options and Similan liveaboard trips from the Krabi mainland.
Ao Nang — Thai-owned dive resort · Recreational PADI courses through technical, cave and trimix diving (TDI/IANTD) — contact for current rates
A Thai-owned family dive resort and, by its own account, the first hotel built in Ao Nang, with in-house accommodation, a pool, compressors, classroom, dive shop, restaurant and dive bar alongside its PADI school. Krabi Scuba Club is the standout choice in the area for technical diving: alongside standard PADI Open Water through Divemaster courses, it runs TDI/IANTD sidemount, decompression, extended-range, trimix and full cave-diving courses — a genuinely rare offering on Thailand's Andaman coast.
Best for: Technical and cave divers, and anyone who wants dive-resort accommodation bundled with their diving.
Figures drawn from Fast Manta Diving Krabi's and Kon-Tiki Krabi's own published Ao Nang price lists as real, sourced examples — Railay Dive Center and Krabi Scuba Club do not publish full pricing online. Confirm current pricing directly with each dive shop before booking.
Most of Krabi's PADI dive centers cluster in Ao Nang — Kon-Tiki Krabi, Fast Manta Diving Krabi and Krabi Scuba Club are all based there or right on the beachfront. Railay Dive Center is the exception, based directly on Railay Beach, the limestone-cliff peninsula reachable only by longtail boat, though it also offers free pickup from Ao Nang hotels for divers staying on the mainland.
The two main day-trip destinations are the Ao Nang Archipelago — a cluster of roughly 13 limestone islands about 45 minutes offshore with macro life like seahorses and bamboo sharks — and the Phi Phi Islands, Krabi's best-known dive destination for scenery and marine life. Some operators, including Kon-Tiki, also run scheduled trips to the King Cruiser wreck, Shark Point and Anemone Reef off Phuket, and Railay Dive Center runs liveaboards further north to the Similan Islands. Marine park entry fees for Phi Phi and Ao Nang are charged separately on the boat.
Based on Fast Manta's published Ao Nang price list, a 2-tank boat dive at the Ao Nang local islands runs about THB 3,500, the same trip to Phi Phi is about THB 4,500, a Discover Scuba Diving taster is THB 4,500-5,900 depending on destination, and a full PADI Open Water certification runs about THB 15,900. Kon-Tiki's published schedule prices Phi Phi and Ao Nang Archipelago trips similarly, around THB 3,300-4,100. Railay Dive Center and Krabi Scuba Club do not publish full price lists online — confirm current rates directly. Exact pricing varies by operator, season and group size.
Yes — every operator profiled here runs day-trip boats from Ao Nang or Railay out to the Phi Phi Islands, which is how most Krabi-based divers experience Phi Phi's dive sites without changing accommodation. BAANLYY has not yet built a dedicated dive-shops guide for operators based directly on Koh Phi Phi itself; if you're staying on Phi Phi rather than the Krabi mainland, PADI's own directory (padi.com/dive-shops) lists island-based operators.
Koh Tao remains Thailand's highest-volume, lowest-cost dive-training hub in the Gulf of Thailand. On the Andaman side, Krabi (via Ao Nang and Railay) offers a smaller but well-established PADI scene with direct access to the same Phi Phi dive sites that operators based on Phi Phi itself use, plus the practical advantage of combining diving with Krabi's climbing, beaches and lower accommodation costs. Krabi Scuba Club is also one of the few places in the region offering technical and cave-diving courses.
November through April is the Andaman coast's dry season and the standard high season for diving, with calmer seas and the best visibility — Kon-Tiki's published high-season schedule runs through this window. The May-October southwest monsoon brings rougher seas and reduced visibility, and some operators (Kon-Tiki includes) scale back or pause their published schedule and ask divers to contact them directly for green-season trips. Confirm current schedules before planning a dive-focused trip in low season.
Verified against each dive center's own official site. Pricing, schedules and operating status change -- confirm directly with the operator before booking. BAANLYY is a data-and-tools platform, not a dive operator, and takes no paid placement in this content.
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Hero photo by Pia B on Pexels. General information, not a diving safety guide -- confirm certification requirements and current operating status directly with each dive shop. Operators, prices and site conditions change; verify before booking or diving.