Island in Surat Thani, Thailand
Koh Tao weather by month and the best time to visit
When to go to Koh Tao
Feb–Sep has the best conditions, with calm seas in Mar–Apr and Jun–Aug. Oct–Dec brings heavy rain and ferry cancellations.
Koh Tao weather by month
Average daily high, rainfall and conditions.
- Jan27°116 mm
- Feb27°36 mm
- Mar28°104 mm
- Apr29°106 mm
- May29°220 mm
- Jun29°227 mm
- Jul28°242 mm
- Aug28°225 mm
- Sep28°250 mm
- Oct28°255 mm
- Nov28°286 mm
- Dec27°193 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 27°C80°F | 26°C79°F | 116 mm | 78% | Pleasant |
| February | 27°C81°F | 26°C79°F | 36 mm | 79% | Pleasant |
| March | 28°C82°F | 27°C81°F | 104 mm | 79% | Pleasant |
| April | 29°C84°F | 28°C83°F | 106 mm | 77% | Pleasant |
| May | 29°C85°F | 28°C83°F | 220 mm | 79% | Rainy |
| June | 29°C84°F | 28°C82°F | 227 mm | 80% | Rainy |
| July | 28°C83°F | 27°C81°F | 242 mm | 81% | Rainy |
| August | 28°C83°F | 27°C81°F | 225 mm | 81% | Rainy |
| September | 28°C82°F | 27°C80°F | 250 mm | 82% | Rainy |
| October | 28°C82°F | 27°C80°F | 255 mm | 81% | Rainy |
| November | 28°C82°F | 27°C81°F | 286 mm | 80% | Rainy |
| December | 27°C81°F | 26°C80°F | 193 mm | 78% | Rainy |
Best months across Thailand
| Place | Best months | Warmest month |
|---|---|---|
| Bangkok | Nov–Feb | Mar (36°C) |
| Phuket | Nov–Mar | Mar (30°C) |
| Chiang Mai | Nov–Jan | Apr (37°C) |
| Koh Samui | Jan–Apr, Jul–Aug | May (30°C) |
| Krabi | Nov–Mar | Mar (31°C) |
| Koh Phi Phi | Nov–Mar | Apr (30°C) |
| Koh Phangan | Jan–Apr, Jul–Aug | May (27°C) |
| Pai | Nov–Feb | Apr (35°C) |
| Pattaya | Nov–Feb | Apr (31°C) |
| Koh Tao | Feb–Aug | May (29°C) |
| Patong | Nov–Apr | Mar (30°C) |
| Hua Hin | Nov–Mar | Apr (33°C) |
| Chiang Rai | Nov–Feb | Apr (35°C) |
| Ayutthaya | Nov–Feb | Mar (37°C) |
| Koh Lanta | Nov–Apr | Apr (29°C) |
| Railay | Nov–Mar | Mar (31°C) |
| Kanchanaburi | Nov–Feb | Apr (37°C) |
| Koh Chang | Nov–Feb | Apr (30°C) |
| Khao Lak | Nov–Mar | Mar (31°C) |
| Koh Samet | Nov–Mar | Apr (30°C) |
| Koh Lipe | Nov–Mar | Apr (30°C) |
| Khao Yai | Nov–Feb | Apr (34°C) |
| Khao Sok | Dec–Apr | Apr (32°C) |
| Sukhothai | Nov–Feb | Apr (38°C) |
| Hat Yai | Jan–Apr | Apr (31°C) |
| Kata Beach | Nov–Mar | Mar (30°C) |
| Jomtien | Nov–Feb | Apr (31°C) |
| Rawai | Nov–Mar | Mar (30°C) |
| Udon Thani | Nov–Feb | Apr (37°C) |
| Koh Kood | Nov–Mar | May (30°C) |
Quick answers
What is the best month to visit Koh Tao?
Feb–Aug. Feb–Sep has the best conditions, with calm seas in Mar–Apr and Jun–Aug. Oct–Dec brings heavy rain and ferry cancellations.
When is the rainy season in Koh Tao?
Rain peaks in November with about 286 mm. Months with 150 mm or more: May–Dec.
What is the hottest month in Koh Tao?
May, with average highs of 29°C (85°F).
How cold does Koh Tao get?
The coolest nights are in January, averaging 26°C (79°F).
More about Koh Tao
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Sources
- NASA POWER climatology (2001–2020)
- Tourism Authority of Thailand
- Lomprayah ferries
- Bangkok Hospital Samui
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Temperatures are adjusted by 0.6°C for the city's elevation. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.