Koh Tao, ThailandQuick decision
When to visit Koh Tao?
🌞 Best time overall
March
🌡️ Optimal temperature
79°F–82°F 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 °F | Max °F | Rainy days (%) | Precip. in/d | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌤️ January | 77°F | 81°F | 28% | 0.1in | 11.0h | 8.3/10 |
| 🌤️ February | 79°F | 81°F | 30% | 0.1in | 11.0h | 8.3/10 |
| ☀️ March | 79°F | 82°F | 17% | 0.0in | 11.1h | 8.9/10 |
| 🌤️ April | 81°F | 84°F | 36% | 0.1in | 11.7h | 8.1/10 |
| ⛅ May | 81°F | 84°F | 69% | 0.2in | 11.4h | 7.3/10 |
| ⛅ June | 81°F | 84°F | 70% | 0.2in | 11.0h | 7.2/10 |
| ⛅ July | 79°F | 82°F | 71% | 0.2in | 10.1h | 7.3/10 |
| ⛅ August | 79°F | 82°F | 67% | 0.2in | 10.6h | 7.4/10 |
| ⛅ September | 79°F | 82°F | 75% | 0.2in | 9.7h | 7.2/10 |
| ⛅ October | 79°F | 82°F | 84% | 0.3in | 10.4h | 7.1/10 |
| ⛅ November | 79°F | 82°F | 73% | 0.4in | 10.5h | 7.2/10 |
| 🌤️ December | 79°F | 81°F | 44% | 0.2in | 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°F, 41% rainy days, 11.4h sunshine/day. Score: 8.1/10.
☀️ Summer (Jun–Aug) — Good time
Average 28°F, 69% rainy days, 10.6h sunshine/day. Score: 7.3/10.
🍂 Autumn (Sep–Nov) — Good time
Average 28°F, 77% rainy days, 10.2h sunshine/day. Score: 7.2/10.
❄️ Winter (Dec–Feb) — Good time
Average 27°F, 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.
Browse activities on GetYourGuide
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°F.
October is the wettest month with 84% rainy days.
Yes, March is the best month with an average of 28°F.
In winter, the average score is 8.1/10. Acceptable conditions for cultural visits.
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