Similan Islands Day Dive Trips and Dive Courses in Khao Lak

Diving Khao Lak Similan Day Trips

IDC Thailand offers Diving Khao Lak Similan Day Trips with dive trips and PADI courses in Khao Lak in conjunction with PADI 5* IDC Center 'Sea Dragon'

Diving Khao Lak Similan Day Trips

We now offer our own tailor made Similan Islands and Koh Bon day trips onboard the M/V Nam Sai, giving you the opportunity to dive these famous islands and return home to your hotel/resort at the end of the day. Departing daily, we offer two contrasting dives on two different dive sites at the Similan Islands, or two dives at Koh Bon with a chance to dive/snorkel with the visiting manta rays that often come to visit this island – please see the schedule below. Trips depart from Thap Lamu harbour at approximately 08.00hrs and the crossing takes about 3 hours.

Onboard you will find a spacious dive deck, an open air lounge with self service area, an air-conditioned interior lounge with TV and bar, fresh water showers and a sun deck. We welcome both divers and snorkellers onboard and have dedicated dive guides and experienced snorkel guides plus a non-diving boat supervisor to co-ordinate the trip and ensure you are looked after at all times.

On a typical day, we will collect you from your resort/hotel in Khao Lak and transfer you to the harbour. Once everyone is onboard, we depart for the Similan Islands or Koh Bon.

Diving Khao Lak Similan Day Trips


The crossing to the Similan Islands or Koh Bon takes about 3 hours and is followed by two dives. Between the dives a freshly cooked, buffet style lunch is served during a two hour surface interval.

On the Koh Bon days (and Similan Island days if we are lucky!) we ask you to take part in our manta ray identification project by taking underwater photographs of any mantas you may have encountered. All mantas have individual markings and this enables us to see how long each particular ray stays in the same area. This information is then sent to an international organisation as part of a worldwide project.




Included in the trip are;

Diving Khao Lak Similan Day Trips

  • Large, spacious boat with three decks
  • Comfortable crossing to and from the Islands in all weather
  • Relax immediately – the M/V Nam Sai will be your home for the whole day!
  • Open air lounge with cushioned seating and self service dining area
  • A/c lounge with sofas, TV / video and fully stocked saloon bar
  • Sun deck with sun mattresses
  • Additional sunbathing / relaxing area at the front of the lower deck
  • Shaded seating area overlooking the bow on the middle deck
  • Spacious dive deck with large dive platform
  • Fresh water showers
  • Beach transfers – enjoy the white sand beaches of the Similan Islands
  • Freshly cooked meals served from our onboard kitchen
  • Western style buffet breakfast featuring full English-style cooked breakfast
  • Thai & Western buffet lunch offering a selection of freshly prepared hot dishes
  • Afternoon snack served on return crossing
  • All day free fruit & snacks, coffee tea & water
  • Vegetarian, special food requirements & children's meals on request
  • Non-diving boat manager supervising your trip throughout the day
  • Professional dive leaders guiding small groups of maximum four divers
  • Dedicated snorkel guides and snorkelling sites - with dinghy support
  • Comprehensive medical kit & 100% oxygen onboard at all times
  • Onboard videographer - buy a personalised memento of your trip

Diving Khao Lak Similan Day Trips


Diving Khao Lak Similan Day Trips

  M/V Nam Sai prices 

1 day, 2 dives 

Diver - 4,500.-THB + Park fee 600.-THB 

Child diver (up to 14 years) - 4,500.-THB + Park fee 400.-THB 

Snorkeller/non diver, 1 day - 2,700.-THB + Park fee 400.-THB 

Child Snorkeller (aged 13-14 years), 1 day - 2,700.-THB + Park fee 200.-THB 

 Child Snorkeller (aged 3-12 years), 1 day - 1,500.-THB + Park fee 200.-THB 

Transfer, one way - 900,-THB

Courses on M/V Nam Sai

Discover Scuba Diver with 1 Nam Say trip, 1 day, 2 dives - 5,500.-THB + Park fees 600.-THB

Open Water Diver with 1 Nam Say trip, 4 days, 4 dives - 12,600.-THB + Park fees 600.-THB 

 Open Water Diver Referral with 1 Nam Say trip, 2.5 days, 4 dives - 9,300.-THB + Park fees 600.-THB 

Scuba Diver Upgrade with 1 Nam Say trip, 2 days, 2 dives - 9,800.-THB + Park fees 600.-THB 

Advanced Open Water Diver with 1 Nam Say trip, 2 days, 5 dives - 10,600.-THB + Park fees 600.-THB

Equipment Rental

Mask, snorkel & fins are included in price for all non - divers

Full set - 600.-THB (dive computers are free of charge for wreck dives and M/V Nam Sai)

BCD - 200.-THB

Regulator - 200.-THB

Wetsuit - 150.-THB

Mask/snorkel/fins - 100.-THB  


Services not included; 

- Diving equipment, as priced above 

- Similan Islands National park entrance fee & diving fees, as priced above 

- Private Dive Guide, cost extra 1,000.-THB per day (for between 1-3 divers)



- All National Park fees to need be paid in cash at the Dive Center on arrival 

- The maximum number of guests onboard is 50 

- Dives are planned to a maximum depth of 30 meters (40 meters experienced divers only) and for a maximum dive time of 1 hour


Check here for prices on all day trips and packages