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Weather in Koh Tao for September 2025

Your guide to Koh Tao weather in September - trends and predictions
  • In general, the average temperature in Koh Tao at the beginning of September is 28.6 °C. As the month progressed, temperatures tended to remain steady, reaching an average of 28.6 °C by the end of September.

  • Koh Tao experiences an exceptionally high level of rainfall in September, with more than 24 rainy days on average.

  • Is September a good time to visit Koh Tao? check out the best time to travel to Koh Tao page.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
2
Dry days
Average rainy days
28
Rainy days
Average snowy days
0
Snow days
Average temperatures
28°/27°
Temperatures
Average wind speed
30 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Koh Tao in September average weather

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Temperatures trend during September in Koh Tao

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
29° /26° 9.9 mm 6
2 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
28° /26° 16.8 mm 6
3 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
28° /26° 9.3 mm 6
4 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
28° /27° 10.4 mm 6
5 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
29° /26° 20.1 mm 6
6 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
29° /27° 18.9 mm 6
7 Sept. Cloudy
Cloudy
29° /27° 3.1 mm 6
8 Sept. Patchy rain possible
Patchy rain possible
29° /28° 1.1 mm 6
9 Sept. Patchy rain possible
Patchy rain possible
29° /27° 1.6 mm 7
10 Sept. Light rain shower
Light rain shower
29° /27° 7.8 mm 6
11 Sept. Overcast
Overcast
29° /27° 0.9 mm 7
12 Sept. Moderate rain
Moderate rain
29° /27° 2.3 mm 6
13 Sept. Partly cloudy
Partly cloudy
29° /27° 5.4 mm 7
14 Sept. Overcast
Overcast
28° /26° 4.1 mm 6
15 Sept. Overcast
Overcast
28° /26° 1.6 mm 6
16 Sept. Light rain shower
Light rain shower
28° /27° 5.9 mm 6
17 Sept. Light rain shower
Light rain shower
28° /27° 7.2 mm 6
18 Sept. Light rain shower
Light rain shower
28° /27° 9 mm 6
19 Sept. Patchy light rain
Patchy light rain
28° /26° 3.6 mm 6
20 Sept. Patchy rain possible
Patchy rain possible
29° /27° 1.3 mm 6
21 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
29° /27° 10.3 mm 6
22 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
29° /27° 7.1 mm 6
23 Sept. Light rain shower
Light rain shower
29° /27° 4.7 mm 6
24 Sept. Light rain shower
Light rain shower
28° /27° 5.1 mm 6
25 Sept. Light rain shower
Light rain shower
28° /25° 6.4 mm 6
26 Sept. Light rain shower
Light rain shower
28° /26° 11.6 mm 7
27 Sept. Light rain shower
Light rain shower
28° /26° 9.6 mm 6
28 Sept. Light rain shower
Light rain shower
29° /26° 5.6 mm 6
29 Sept. Patchy rain possible
Patchy rain possible
29° /27° 6.9 mm 7
30 Sept. Partly cloudy
Partly cloudy
30° /27° 0.2 mm 7
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Important Notice
Our weather forecast for Koh Tao in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Koh Tao forecast closer to your planned date for the most up-to-date weather information.

Koh Tao in September - FAQ

What are the expected maximum and minimum temperatures in Koh Tao during September?
During September, expect a variety of temperatures with highs around 28° and lows near 27°, suitable for diverse activities and preferences.
How much rainfall should be expected in Koh Tao during September?
Significant rainfall exceeding 318.7 mm is expected in Koh Tao during September, occurring over more than 28 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Koh Tao during September?
The average wind speed in Koh Tao during September is 30 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Koh Tao in September?

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
    • Lightweight Clothing: T-shirts, blouses, shorts, skirts
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Umbrellas/Raincoats: For rainy days
  • Personal Items
    • Sunscreen: High SPF for sunny destinations
    • Lip Balm with SPF: To protect against chapped lips

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Location coordinates 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.

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