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Explore Koh Tao's reefs, wrecks, and pinnacles with guides who care.

With over 25 dive sites just minutes away by boat, Koh Tao is one of the best places in the world for fun diving.

And with our location in the south of Koh Tao, we have the unique advantage of diving both the east and west coast of the island every day — giving you more variety and the chance to explore the best sites no matter the conditions.

At Hydronauts, we keep our groups small with no more than 4 divers per guide so you get personal attention and relaxed, safe dives. Our guides are local experts who not only know the island's dive sites inside out but also help you improve your skills and share insights about Koh Tao's marine life.

Fun Diving
The Hydronauts Fun Diving Experience
  • 25+ dive sites, all close by — wrecks, pinnacles, coral gardens, and artificial reefs just a short boat ride away.
  • The chance to see whale sharks — Koh Tao's biggest visitors show up when you least expect them.
  • Small groups, big dives — no more than 4 divers per guide, so you never feel rushed and get the personal attention you deserve.
  • Guides who care — our team knows Koh Tao inside out and will help you spot marine life and sharpen your diving along the way.
  • South Koh Tao advantage — we dive both east and west coasts daily, giving you the best sites in any conditions.
  • Calm, clear water year-round — the Gulf of Thailand offers warm, relaxed conditions perfect for every level of diver.
  • A spacious dive boat — with a large upstairs deck that's perfect for hanging out and enjoying your surface intervals in comfort.
  • Top-quality gear — all our divers dive in backplate & wing setups, with a wide selection of fins to make sure you're diving in comfort and control.
What our Boat Schedule Looks Like
Morning Boat
  • Meet at 06:15
  • Depart at 06:45 straight from the beach
  • Visit Koh Tao's deeper and more advanced sites for 2 dives
  • Return around 11:00
Afternoon Boat
  • Meet at 11:45
  • Depart at 12:15 straight from the beach
  • Visit shallower sites closer to the island for 2 relaxed, scenic dives
  • Return around 17:00
Our Fun Diving Prices
1 Boat Trip (2 dives): 2,000 THB

Includes dive guide, full rental gear, and refreshments on the boat.

Dive computers are not included but available to rent for 250 THB per trip.

Fun Dive Packages
  • 3 Trips (6 dives): 5,400 THB
  • 4 Trips (8 dives): 6,800 THB
  • 5 Trips (10 dives): 8,000 THB
What you need to know
  • Each boat trip includes 2 dives
  • Duration: Half day (morning or afternoon trips)
  • Minimum certification: Open Water Diver (or equivalent)
  • Haven't dived in a while? A Scuba Refresher is required if it's been over 12 months since your last dive
  • Small groups — maximum 4 divers per guide
  • We always do our best to split groups by experience, so everyone dives at their own pace.
  • All divers must have valid dive insurance to dive with us. If you don't already have your own, we can provide coverage for 100 THB while you dive with us.
Days
½
Dives
2
Max Depth
depends on certification
Frequently Asked Questions
  • Do I need to be certified to go fun diving?
    Yes, you'll need to be at least an Open Water Diver (or equivalent) to join our fun dives. If it's been over 12 months since your last dive, we'll get you back in the water safely with a Scuba Refresher first.
  • How many dives are included in one trip?
    Each of our boat trips includes 2 dives. You can join a single trip or pick one of our fun diving packages for more dives at a better price.
  • Can I do a night dive in Koh Tao?
    Definitely. Night dives are one of Koh Tao's highlights and we schedule them regularly. Exploring the reefs after dark is a completely different experience. Night dives are not included in our fun dive packages — the price is 1,200 THB.
  • How many divers will be in my group?
    We always keep groups small with a maximum of 4 divers per guide and we do our best to split groups by experience so you can dive at your own pace.
  • Do I need dive insurance?
    Yes, all divers diving with us must have valid dive insurance to join trips. If you don't already have coverage, we can arrange it for 100 THB for you.
  • What kind of boat will we dive from?
    Our dive boat is spacious, comfortable, and has a big upstairs deck which is perfect for hanging out during your surface intervals.
  • Where will we dive?
    Because we're based in the south of Koh Tao, we can dive both the east and west coasts daily, which means you'll always get the best sites for the conditions.
  • Will I see a whale shark?
    There's always a chance as Koh Tao sits right on their migration routes. We often visit the sites where whale sharks are most commonly spotted, like the pinnacles, but you never know when one will appear. That's part of the magic.