The diving Koh Samui day trip to Sail Rock is easier than most people think. Most assume it’s impossible — too far, too complicated, too many ferries. In reality, with The Divers Boat it is one of the most extraordinary dive days in the Gulf of Thailand. Take the morning Lomprayah ferry to Koh Phangan, dive a double Sail Rock with us, and be back in Koh Samui the same evening. Indeed, we are the only operator in the Gulf of Thailand to make this diving Koh Samui day trip possible.
1 day
From Koh Samui
2
Dives at Sail Rock
10:00
Boat departure
16:00
Back at pier
Diving Koh Samui day trip to Sail Rock: is it really possible?
Yes — and the key is a 10:00am departure from Koh Phangan. Most dive operators in the area depart at 8:00am. Consequently, guests from Koh Samui simply cannot make it in time: the first Lomprayah ferry arrives in Koh Phangan too late for an 8am boat. As a result, Koh Samui divers are effectively locked out.
At The Divers Boat, we made a deliberate choice. Our Koh Phangan boat departs at 10:00am and returns at 4:00pm. This schedule is designed precisely to allow guests from Koh Samui to take the first Lomprayah, join our boat in Koh Phangan, dive a full double Sail Rock, and catch the last Lomprayah back the same evening. No other dive operator in the Gulf of Thailand makes this diving Koh Samui day trip possible.
Your diving Koh Samui day trip, step by step
The logistics are simpler than they sound. Here is exactly how your day unfolds:
~7:30
Board the first Lomprayah from Koh Samui
Head to the Lomprayah pier in Koh Samui and board the first ferry of the day to Koh Phangan. The crossing takes approximately 30 minutes.
~8:30
Arrive in Koh Phangan
You arrive at Thong Sala pier, Koh Phangan — relaxed and with plenty of time. Walk to The Divers Boat pier, grab a coffee, and get your briefing.
10:00
Departure to Sail Rock
Our boat departs Koh Phangan for Sail Rock. The crossing takes approximately 1h15. Snacks, tea, coffee and water are on board throughout.
11:15
First dive at Sail Rock
Your first descent at one of the best dive sites in the world. The famous chimney, barracuda schools, giant trevally — and possibly a whale shark.
12:30
Surface interval — hot lunch on board
A freshly cooked hot meal (chicken and rice), fresh fruit and snacks. You debrief the first dive, rest, and prepare for the second descent.
13:30
Second dive at Sail Rock
Often the best one. You know the site now, you know where to look, and you feel at home in the water.
16:00
Back at Koh Phangan pier
We return to Thong Sala pier. From there, catch the last Lomprayah ferry back to Koh Samui. Two Sail Rock dives in the bag.
~17:00
Back in Koh Samui
Last Lomprayah arrives in Koh Samui. You are back at your hotel before dinner — rested, exhilarated, and already thinking about the next dive.
Check the Lomprayah schedule before you book
Ferry times vary slightly by season. We recommend checking the latest schedule at
lomprayah.com to confirm the first departure from Koh Samui and the last return from Koh Phangan. Our team can also advise you when you contact us.
Why Sail Rock is worth the trip from Koh Samui
Sail Rock — known locally as Hin Bai — is widely regarded as the best dive site in the Gulf of Thailand. It is an isolated granite pinnacle rising from 42 metres to just below the surface, in open sea between Koh Phangan and Koh Tao. Its isolation means industrial fishing is impossible and, as a result, marine life here has developed freely for decades. According to Wikipedia, it is consistently ranked among the top dive sites in Southeast Asia.
- Whale sharks (year-round)
- Chevron barracuda schools
- Giant trevally and kingfish
- Malabar and marbled groupers
- Batfish and glassfish (chimney)
- Sailfish
Furthermore, the site features a unique natural chimney — a vertical swim-through entered at 18 metres and exiting at 5 metres, surrounded by glassfish and batfish. Our team has encountered two whale sharks simultaneously on a single dive here. You can read the full site description on our Sail Rock dive site page →
Why choose The Divers Boat for your diving Koh Samui day trip
✅
The only 10:00am departure in the Gulf
Every other operator departs at 8:00am — making this diving Koh Samui day trip impossible. Our 10:00am departure is the only one compatible with the Lomprayah schedule.
✅
Maximum 4 divers per guide
We keep groups small underwater regardless of how many divers are on board. You get a genuinely personal experience, not a crowded convoy.
✅
Hot lunch, snacks and drinks included
A freshly cooked hot meal, fresh fruit, snacks, tea, coffee and water are included — at no extra charge.
✅
All equipment included — no gear bag needed
BCD, regulator, wetsuit, mask, fins and tank are all stored on board. You arrive with nothing but yourself.
✅
Sail Rock every single day
Seven days a week, year-round. You never have to plan your stay around a fixed weekly schedule.
Practical information — diving Koh Samui day trip
Number of dives
2 dives at Sail Rock
Departure point
Koh Phangan (Thong Sala pier)
Boat departure / return
10:00am → 4:00pm daily
What’s included
Equipment, guide, lunch, snacks, drinks
Book in advance — especially in high season
We recommend booking at least the day before, and further in advance during peak season (December–April and July–August). Contact us directly by WhatsApp at +66 828 149 282 or via our
contact form.
Frequently asked questions — diving Koh Samui day trip
Can I do this day trip if I’m not staying on Koh Phangan?
Absolutely. This diving Koh Samui day trip is designed precisely for divers based in Koh Samui. You take the first Lomprayah to Koh Phangan, dive with us, and return the same evening. No accommodation on Koh Phangan needed.
Do I need to bring my own equipment?
No. All dive equipment is stored on board — BCD, regulator, wetsuit, mask, fins and tank are all included. You simply need your dive certification card.
What level do I need?
A valid Open Water certification (SSI, PADI or equivalent) is the minimum. Advanced Open Water is recommended to explore the deeper sections of Sail Rock.
Can I see whale sharks on this diving Koh Samui day trip?
Whale sharks have been spotted at Sail Rock in every month of the year. Sightings are most frequent from March to May and October to November. Encounters cannot be guaranteed, but Sail Rock gives you some of the best odds in the Gulf.
Is this trip available every day?
Yes. The Divers Boat operates daily departures to Sail Rock from Koh Phangan — seven days a week, year-round, weather permitting.
Ready to book your diving Koh Samui day trip?
Contact us by WhatsApp or via our form — we confirm your spot on the next 10:00am departure from Koh Phangan.
Staying longer? Explore our other diving options
The Divers Boat operates from Koh Phangan and Koh Tao. Moreover, if your stay allows a few extra days, you can also dive directly from Koh Tao — 28 dive sites, 2 dedicated boats, and the exclusive Open Water in 2 days.
Dive Center
SSI since 2016
2 dedicated boats
EN · FR · TH
See page →
Diving Koh Phangan
Sail Rock 1h15 away
10am departure daily
See page →
Diving Koh Tao
28 sites · 2 boats · 7/7
Open Water in 2 days
See page →
The Divers Boat —
SSI Dive Centre · Koh Tao & Koh Phangan, Thailand · WhatsApp: +66 828 149 282 · thediversboat.com
