Koh Tao, ThailandQuick decision
When to visit Koh Tao?
🌞 Best time overall
March
🌡️ Optimal temperature
26°C–28°C in March
🌧 Least rain
17% rainy days in March
🌧 Wettest month
October (84%)
📅 Best score
8.9/10
By trip type
Best time by type of trip
PADI DivingMarch–October — low-cost certifications, 25+ sites.
Turtle SnorkellingYear-round — Shark Bay, Japanese Garden and Aow Leuk.
BeachesMarch–September — Sairee, Freedom Beach and Tanote Bay.
Climbing & BoulderingMarch–October — seaside cliffs, spots for all levels.
Monthly climate data
Koh Tao weather month by month
| Month | Min °C | Max °C | Rainy days (%) | Precip. mm/d | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌤️ January | 25°C | 27°C | 28% | 3.2 | 11.0h | 8.3/10 |
| 🌤️ February | 26°C | 27°C | 30% | 1.9 | 11.0h | 8.3/10 |
| ☀️ March | 26°C | 28°C | 17% | 1.0 | 11.1h | 8.9/10 |
| 🌤️ April | 27°C | 29°C | 36% | 2.9 | 11.7h | 8.1/10 |
| ⛅ May | 27°C | 29°C | 69% | 5.0 | 11.4h | 7.3/10 |
| ⛅ June | 27°C | 29°C | 70% | 4.3 | 11.0h | 7.2/10 |
| ⛅ July | 26°C | 28°C | 71% | 4.7 | 10.1h | 7.3/10 |
| ⛅ August | 26°C | 28°C | 67% | 3.9 | 10.6h | 7.4/10 |
| ⛅ September | 26°C | 28°C | 75% | 6.0 | 9.7h | 7.2/10 |
| ⛅ October | 26°C | 28°C | 84% | 8.5 | 10.4h | 7.1/10 |
| ⛅ November | 26°C | 28°C | 73% | 9.1 | 10.5h | 7.2/10 |
| 🌤️ December | 26°C | 27°C | 44% | 5.2 | 11.0h | 7.8/10 |
Ideal
Fair
Challenging climate
Source: Open-Meteo · 10 years
🌴 Tropical destination — heavy rain months benefit from an algorithmic adjustment: tropical showers are intense but brief and usually don't ruin a trip.
Seasonal breakdown
What to expect each season
🌸 Spring (Mar–May) — Good time
Average 29°C, 41% rainy days, 11.4h sunshine/day. Score: 8.1/10.
☀️ Summer (Jun–Aug) — Good time
Average 28°C, 69% rainy days, 10.6h sunshine/day. Score: 7.3/10.
🍂 Autumn (Sep–Nov) — Good time
Average 28°C, 77% rainy days, 10.2h sunshine/day. Score: 7.2/10.
❄️ Winter (Dec–Feb) — Good time
Average 27°C, 34% rainy days, 11.0h sunshine/day. Score: 8.1/10.
Accommodation
Find a place to stay in Koh Tao
Check availability during the recommended period
Tip : May, June offer a good weather/price balance — decent score with fewer crowds.
Search on Hotels.comActivities & tours
Activities and tours in Koh Tao
Guided tours, skip-the-line tickets and local experiences.
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Flights
Find a flight to Koh Tao
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Monthly weather
Detailed weather by month
FAQ
Frequently asked questions
March is ideal with 17% rainy days and 28°C.
October is the wettest month with 84% rainy days.
Yes, March is the best month with an average of 28°C.
In winter, the average score is 8.1/10. Acceptable conditions for cultural visits.
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