Weather in Koh Tao for September 2026
Until now, September 2026 in Koh Tao has been nearly identical to the historical average, with a temperature of 29.1 °C (showing only a slight deviation of 0.2 °C).
The forecast for the next days in Koh Tao predicts temperatures to be around 28 °C, close to the historical average.
In general, the average temperature in Koh Tao at the beginning of September is 29 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 28.4 °C by the end of September.
Koh Tao experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 192.3 mm.
Is September a good time to visit Koh Tao? check out the best time to travel to Koh Tao page.
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Koh Tao Weather September
Temperatures trend during September in Koh Tao
September weather in Koh Tao day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Moderate or heavy rain shower | 29° /26° | 7.9 mm | 5 | |
| 2 Sept. |  Light rain shower | 29° /26° | 9.8 mm | 6 | |
| 3 Sept. | Light rain shower | 29° /26° | 6.6 mm | 5 | |
| 4 Sept. | Light rain shower | 29° /27° | 6.2 mm | 5 | |
| 5 Sept. | Moderate or heavy rain shower | 29° /26° | 10.3 mm | 6 | |
| 6 Sept. | Light rain shower | 29° /27° | 10.9 mm | 6 | |
| 7 Sept. |  Cloudy | 29° /27° | 3.5 mm | 6 | |
| 8 Sept. | Light rain shower | 29° /27° | 2.7 mm | 6 | |
| 9 Sept. | Patchy rain possible | 29° /27° | 6.2 mm | 6 | |
| 10 Sept. | Patchy rain possible | 29° /26° | 8.7 mm | 5 | |
| 11 Sept. |  Overcast | 29° /27° | 7.3 mm | 5 | |
| 12 Sept. |  Moderate rain | 29° /27° | 8.9 mm | 5 | |
| 13 Sept. | Moderate or heavy rain shower | 29° /26° | 17.8 mm | 5 | |
| 14 Sept. | Light rain shower | 28° /26° | 11.8 mm | 5 | |
| 15 Sept. | Light rain shower | 28° /26° | 6.1 mm | 6 | |
| 16 Sept. | Light rain shower | 29° /27° | 14.5 mm | 11.3 | |
| 17 Sept. | Light rain shower | 28° /27° | 6.7 mm | 5.6 | |
| 18 Sept. | Overcast | 28° /27° | 1.9 mm | 11.7 | |
| 19 Sept. | Patchy rain possible | 29° /27° | 9.1 mm | 9.4 | |
| 20 Sept. | Light rain shower | 28° /27° | 30.4 mm | 10 | |
| 21 Sept. | Light rain shower | 27° /25° | 24.2 mm | 6 | |
| 22 Sept. | Light rain shower | 27° /26° | 8 mm | 6 | |
| 23 Sept. | Patchy rain possible | 27° /26° | 6 mm | 6 | |
| 24 Sept. | Light rain shower | 28° /27° | 18.6 mm | 6 | |
| 25 Sept. | Light rain shower | 27° /25° | 7.7 mm | 6 | |
| 26 Sept. | Overcast | 28° /26° | 2.1 mm | 6 | |
| 27 Sept. | Overcast | 29° /28° | 4 mm | 7 | |
| 28 Sept. | Overcast | 29° /28° | 0.4 mm | 6 | |
| 29 Sept. | Overcast | 29° /28° | 1.9 mm | 7 | |
| 30 Sept. |  Partly cloudy | 29° /27° | 4.1 mm | 6 | |
| Next | |||||
Koh Tao weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 29°/27° | 28°/27° | 28°/27° |
| Rainfall | 152 mm | 192 mm | 323 mm |
| Wind | 27.4 km/h | 30.6 km/h | 22.2 km/h |
| Humidity | 74% | 75% | 75% |
| Rainy days | 31 days | 28 days | 31 days |
| Dry days | 0 days | 2 days | 0 days |
Planning a trip to Koh Tao? Discover the best time to visit
Koh Tao in September - FAQ
What are the expected maximum and minimum temperatures in Koh Tao during September?
How much rainfall should be expected in Koh Tao during September?
What are the typical wind conditions in Koh Tao during September?
Koh Tao water temperatures in September
The average water temperature of the Gulf of Thailand near Koh Tao in September is 28.2 °C. Temperatures remain fairly consistent throughout the month.
- What is the water temperature in Koh Tao in September?
- The average water temperature in Koh Tao in September is 28.2 °C.
- Can you swim in Koh Tao in September?
- The sea feels almost bath-like – perfect for floating, paddle-boarding or spending hours snorkeling without a wetsuit.
September rainfall patterns in Koh Tao
UV exposure in Koh Tao during September
What to pack to Koh Tao in September?
Warm & sunny · highs around 28 °C, frequent showers
As you prepare for your trip to Koh Tao in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Koh Tao, during September, is comfortable and enjoyable, regardless of the weather conditions.
🧥 Clothing
👟 Footwear
🎒 Accessories
🧴 Personal Items
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Where is Koh Tao?Get accurate weather forecasts for Koh Tao, located at latitude 10.098 and longitude 99.838. Stay updated with localized weather information tailored for Koh Tao.