Trip base · Thailand
Koh Tao
Koh Tao is one of the busiest places in the world to learn to dive, with calm, shallow sites. Chumphon Pinnacle and Sail Rock are deeper pinnacles with schools of fish and occasional whale sharks.
Strong fit for March
28°C+
- Strength: Water 28–29°C in March
- Strength: 3 of 3 sites are in season in March
- Strength: Calm seas on almost every day
Pack a 3 mm wetsuit for March.
Why this match: 40 + 26 + 20 + 11 = 97
- Season40 / 40
- 3 of 3 sites are in season in March; calm on almost every day.
- Water26 / 27
- Average 29°C; your minimum is 28°C. Pack a 3 mm wetsuit.
- Your level20 / 20
- No level picked, so all 3 sites count.
- Weather11 / 13
- Rain on about 1 day in 3; no real storm risk.
Month by month
Season: best March to September.
| Month | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Season | January: Off season | February: Off season | March: Best | April: Best | May: Best | June: Best | July: Best | August: Best | September: Best | October: Off season | November: Off season | December: Off season |
| Mantas | January: We don't know yet | February: We don't know yet | March: We don't know yet | April: We don't know yet | May: We don't know yet | June: We don't know yet | July: We don't know yet | August: We don't know yet | September: We don't know yet | October: We don't know yet | November: We don't know yet | December: We don't know yet |
| Whale sharks | January: Possible | February: Possible | March: Possible | April: Possible | May: Possible | June: Possible | July: Possible | August: Possible | September: Possible | October: Possible | November: Possible | December: Possible |
| Hammerheads | January: Not seen | February: Not seen | March: Not seen | April: Not seen | May: Not seen | June: Not seen | July: Not seen | August: Not seen | September: Not seen | October: Not seen | November: Not seen | December: Not seen |
| Reef sharks | January: Likely | February: Likely | March: Likely | April: Likely | May: Likely | June: Likely | July: Likely | August: Likely | September: Likely | October: Likely | November: Likely | December: Likely |
| Turtles | January: Likely | February: Likely | March: Likely | April: Likely | May: Likely | June: Likely | July: Likely | August: Likely | September: Likely | October: Likely | November: Likely | December: Likely |
| Dolphins | January: We don't know yet | February: We don't know yet | March: We don't know yet | April: We don't know yet | May: We don't know yet | June: Possible | July: We don't know yet | August: We don't know yet | September: We don't know yet | October: We don't know yet | November: We don't know yet | December: We don't know yet |
| Water | 28° | 28° | 29° | 30° | 30° | 30° | 29° | 29° | 29° | 29° | 29° | 28° |
| Rain days | 9 | 6 | 10 | 14 | 25 | 24 | 25 | 24 | 26 | 27 | 20 | 11 |
| Calm days | 28 | 27 | 30 | 29 | 26 | 20 | 19 | 17 | 18 | 27 | 24 | 22 |
| Storm risk | – | – | – | – | – | – | – | – | – | – | 7% | – |
Storm risk: – means under 5%.
Dive sites here
3 sites on Divetip.
Getting there
Fly to Koh Samui (USM). Minivan and catamaran via Koh Phangan: about 3 h 15 min.
Day boat only.
What diving costs
A day of diving from about €53
A day of diving
Crystal Dive: THB 2,200 for 2 dives (about €59)
'From 2,200 THB - 9,000 THB (2-10 Dives)'; trips include two dives. Includes full standard scuba equipment, free dive computer rental, 30-day insurance. No exclusions listed.
Big Blue Diving: THB 2,000 for 2 dives (about €53)
'2 Dives: 2,000 baht'. Equipment provided; torch/computer/compass rental 200 THB each per trip. Insurance and fees not mentioned.
Prices checked 8 November 2026; park fees and equipment often extra.
Non-divers: snorkeling from the shore and by boat
Good snorkeling is reachable straight from the beach at bays such as Aow Leuk, Tanote Bay and Shark Bay, and half-day snorkel boat tours run to Koh Nang Yuan and the hidden bays.
Book your Koh Tao trip
- Book a Koh Tao dive trip on Klook (partner link, opens in a new tab)
- Search flights on Aviasales (partner link, opens in a new tab)
Partner links: we may earn a commission.