+66 986 628 623

You can call and message us via WhatsApp. Bookings for tomorrow close at 20:00 tonight.

68/26 Moo 5, Khuk Khak, Takua Pa, Phang Nga, 82220

We’re centraly located opposite 7/11 Bang Niang Market. Just cross the street and look left.

contact@medivingkhaolak.com
5000฿ / per person

Koh Tachai & Koh Bon

Thursday

Two advanced giants in one day — pinnacles, walls, and big ocean vibes

Every Thursday

This is the “serious diving” day — the one that feels far out, powerful, and totally different from the easy island reef trips. Koh Tachai is known for its offshore ridge and twin-peak style structure, where fish action can be intense and the whole dive feels alive. When current is present, it’s not just a detail — it becomes part of what makes this site so exciting, with marine life using the flow and divers getting that real open-sea energy.

Koh Bon brings a completely different kind of wow: dramatic wall and slope diving along a ridge that drops into deeper water, often lined with sea fans and schooling fish feeding in the current. This is also one of the classic manta “hope spots” of the region — the type of dive where you find yourself scanning the blue because the next silhouette could be the one. Put together, Koh Tachai and Koh Bon make a high-impact day for divers who want the best version of offshore Andaman diving in a single trip.

Price List

Category Option What’s included Price
Diving Day Trip Adult 2 dives 5000฿
Boat Day Trip Passenger Boat passenger (non-snorkeler) 2400฿
Discover Deal (5% off) 6 dives 3 trips (3× Similan) 13,999฿
Explorer Deal (10% off) 10 dives 5 trips (3× Similan + Richelieu + local) 20,999฿
Adventurer Deal (15% off) 15 dives 7 trips (5× Similan + Richelieu + local) 28,999฿

+ Rental gear discount for all package deals

1 day
Min. 10+ Age
Andaman Sea
Diving

  • Destination

    Andaman Sea

  • Departure

    Hotel Pick-up & Drop-off

  • Departure Time

    Pick-up between 7:10 and 8:20 depending on your area

  • Return Time

    Approximately 16:30

  • Dress Code

    Swimwear, quick-dry shirt, a hat and sunglasses. Bring a towel and a long-sleeve for wind and sun.

  • Included

    2-way Hotel Transfer
    Liability Insurance
    Life Jackets
    Lunch & Fruits
    Mask, Snorkel & Fins
    Professional Guide
    Travel Insurance
    Water & Soft Drinks

  • Not Included

    Crew Tips
    Diving Insurance
    Guide Tips
    National Park Fees
    Other Rental Equipment
1

7:30 Hotel pick-up

Pick-up is done by shared taxi and depends on your hotel location. We’ll confirm your exact pick-up time after booking. Please be ready in the lobby 5–10 minutes early.

Pick-up times by area

Nam Khem: 07:30
Bang Sak: 07:40
Pak Weep: 07:45
Pakarang: 07:50
Khuk Khak: 08:05
Bang Niang: 08:10
Nang Thong: 08:15
Lam Kaen: 08:20

2

9:00 Speedboat departure

We meet at Tap Lamu Pier (south of Khao Lak) to wait for all guests to arrive and depart by speedboat at 09:00. After a short briefing, we get comfortable on board and start the ride out to the Similan Islands.
3

10:30 Arrival at the first Island

We reach the first island around 10:30 (timing depends on sea conditions). Your guide will run a full dive briefing: site plan, depth/time, buddy teams, entries/exits, and safety procedures.
4

11:00 Dive 1

Your first guided fun dive of the day.
5

12:00 Surface interval + lunch

After Dive 1, we take a longer break on the boat to rest, rehydrate, and enjoy lunch while we cruise or reposition to the next dive site.
6

13:00 Dive 2

Second guided fun dive, usually around 13:00. This can be a bit later depending on the site choice and boat logistics on the day.
7

14:30 Cruise back to Tap Lamu Pier

After the second dive, we relax on board for the ride back, with drinks and fruits.
8

16:00 Return to pier + hotel drop-off

We’re typically back at Tap Lamu Pier around 16:00 (can vary by route and conditions). From there, shared taxis take you back to your hotel, usually arriving between 16:30 and 17:30 depending on your area and traffic.

Tour Location

Koh Tachai & Koh Bon – Current-powered action, big structure, and true Andaman adrenaline

This is one of the most exciting day-trip combinations in the region. Koh Tachai and Koh Bon are both shaped by open-ocean conditions, which means more current, more fish, and more of that “anything can happen” feeling. These dives are all about dramatic underwater terrain, huge schools in motion, and the kind of energy that makes you surface with a massive grin.
Koh Tachai is famous for its offshore pinnacle and ridge-style structure where current brings life right to you. When the water moves, the reef wakes up: baitfish gather, bigger fish hunt, and the whole dive feels alive and dynamic. The topography is bold and rugged, with boulders and coral growth creating a proper “ocean mountain” vibe, and it’s one of those sites where you spend half the dive scanning the blue because surprises are part of the game.
Koh Bon complements that perfectly with a different kind of drama: deeper drop-offs, ridge lines, and wall-like sections that fall into the open sea. You’ll often see schools stacked along the reef edge, with sea fans and corals leaning into the flow. It’s a site that feels big and spacious, and it rewards calm diving and good control, especially when the current is running. Put together, Koh Tachai and Koh Bon create a day that feels like the “high voltage” side of the Andaman: bold terrain, powerful marine life, and dives that stick in your memory.

Price List for Rental & Fees

Below you’ll find our standard rental rates and the most common National Park fees. Availability can be limited on busy days.

Rental equipment prices (per day)

Item Price
BCD 200 ฿
Regulator 200 ฿
Shorty wetsuit (3 mm) 100 ฿
Dive computer 250 ฿
Dive torch 200 ฿
Compass 150 ฿

Tip: Rental availability is limited on busy days — reserve early if you need specific items.

National Park Fees

Fee Adults Children
National Park entry fee 500 ฿ 250 ฿
National Park diving fee 200 ฿ 200 ฿
National Park fees are set by authorities and can change. We’ll confirm the applicable fees in your booking message.

Optional Add-ons

  • Nitrox (12L): 200 ฿
  • Private guide: 2000 ฿
  • Underwater photos/video: We don't have a dedicated photographer on board, but your guide usually has a camera and can take pictures and videos of you for ~ 1000 – 1500 ฿ per diver
 

Tipping

Tipping is not required, but it’s always appreciated if you enjoyed your day. If you’d like a simple guideline:
  • Boat crew (day trips): ~100–300 ฿ per guest
  • Dive guide: ~500–1000 ฿ per diver

If service was exceptional: tip more — but always optional.

Booking Requirements

  • For booking a trip, we require: first name, family name, nationality, date of birth, passport number & hotel name.
  • For divers we also need: certification level, number of logged dives, date of last dive, and proof of certification.
  • All visitors must carry a copy or photo of their passport during the trip.

Similan National Park Rules

  • Season: The Similan Islands are closed every year from 16 May to 14 October and open from 15 October to 15 May.
  • No drones: Drone flights are strictly prohibited.
  • No single-use plastics: Many Thai National Parks prohibit single-use plastic items (and foam containers). Please avoid bringing disposable plastic/foam packaging into the park.
  • Reef-safe sunscreen only: Thai National Parks have announced bans on certain chemical sunscreens that are harmful to coral. Please use reef-safe sunscreen or protective clothing instead.
  • Respect wildlife: Do not touch, chase, or disturb marine life. Never stand on coral or the seabed, and never take shells or coral as souvenirs.
  • Follow park staff & boat crew instructions: Rules can change depending on conservation measures and conditions. Always follow the guide briefing and any ranger instructions.

New Thailand Diving & Snorkeling Rules

Thailand introduced stricter nationwide standards for diving and snorkeling activities (effective 22 April 2025) to protect coral reefs and improve safety.
  • Supervision required: Every trip must be accompanied by a certified dive supervisor or assistant.
  • Life jackets for snorkeling near coral: Life vests must be provided and worn when snorkeling near coral reefs (unless the tourist holds a recognized freediving certificate).
  • Mandatory briefing: Guests must receive a briefing on laws, safety, and responsible marine practices before activities.
  • Group ratios: Limits apply to how many guests one supervisor can oversee (different limits for deep diving vs snorkeling/freediving, and for training sessions).
  • Camera rules: Underwater photography is restricted unless the diver is qualified (e.g., Advanced certification or 40 logged dives) and can show proof if requested.
  • Reef distance: Divers must stay at least 2 metres above coral heads, and fin control must be demonstrated before approaching coral areas.
To comply with these rules, reminder: we may limit snorkeling approach to reefs, and we may ask guests to leave cameras on board if requirements are not met. Divers are expected to control their buoyancy for their own safety and the safety of the guide, group and environment.

Booking Deadlines

  • Bookings: latest 18:00 the day before the trip.
  • Cancellations: latest 12:00 the day before the trip.
Please book early: Similan National Park and our boat have limited tickets per day. We strongly recommend booking well in advance — especially for diving packages.

Boat Specifications

  • Space for 28 divers including guides
  • 1 toilet & 2 fresh water showers
  • Engines: 3 x 250hp Suzuki, Speed: 30 kts (55km/h)
  • Petrol tank: 800 liters, Water tank: 300 liters
  • Length: 15,6m, Width: 3,8m
  • Full Emergency Equipment on board, (2 VHF & 1 CB Radio, AIS, Emergency O2, Medical First Aid Kit & Life Jackets)
Liability Notice Participation Requirements