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Weather in Ko Samui for August 2025

Your guide to Ko Samui weather in August - trends and predictions
  • In general, the average temperature in Ko Samui at the beginning of August is 28.7 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 29.4 °C by the end of August.

  • Ko Samui experiences an exceptionally high level of rainfall in August, with more than 24 rainy days on average.

  • Is August a good time to visit Ko Samui? check out the best time to travel to Ko Samui page.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
2
Dry days
Average rainy days
29
Rainy days
Average snowy days
0
Snow days
Average temperatures
29°/27°
Temperatures
Average wind speed
24 km/h
Avg max wind
Average humidity
74 %
Avg humidity

Ko Samui in August average weather

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Temperatures trend during August in Ko Samui

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

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Date Weather Temperatures Rain UV More
1 Aug. Patchy rain possible
Patchy rain possible
28° /27° 1.4 mm 6
2 Aug. Patchy rain possible
Patchy rain possible
29° /27° 2.9 mm 6
3 Aug. Partly cloudy
Partly cloudy
29° /28° 0.2 mm 7
4 Aug. Patchy rain possible
Patchy rain possible
29° /27° 4.5 mm 6
5 Aug. Patchy rain possible
Patchy rain possible
29° /27° 2.6 mm 6
6 Aug. Light rain shower
Light rain shower
29° /27° 5.8 mm 6
7 Aug. Light rain shower
Light rain shower
28° /27° 13.8 mm 6
8 Aug. Patchy rain possible
Patchy rain possible
29° /27° 0.4 mm 6
9 Aug. Light rain shower
Light rain shower
30° /27° 14.4 mm 6
10 Aug. Patchy rain possible
Patchy rain possible
30° /28° 1.1 mm 7
11 Aug. Patchy rain possible
Patchy rain possible
30° /28° 3.7 mm 7
12 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
29° /28° 10.3 mm 6
13 Aug. Patchy rain possible
Patchy rain possible
30° /28° 3.8 mm 7
14 Aug. Patchy rain possible
Patchy rain possible
30° /28° 3.2 mm 7
15 Aug. Patchy light drizzle
Patchy light drizzle
29° /28° 2 mm 6
16 Aug. Patchy rain possible
Patchy rain possible
29° /28° 8.9 mm 6
17 Aug. Patchy rain possible
Patchy rain possible
30° /28° 6.9 mm 6
18 Aug. Patchy rain possible
Patchy rain possible
30° /28° 4.4 mm 7
19 Aug. Patchy rain possible
Patchy rain possible
29° /28° 2.3 mm 6
20 Aug. Patchy rain possible
Patchy rain possible
29° /27° 6.3 mm 6
21 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
29° /27° 2.1 mm 6
22 Aug. Heavy rain at times
Heavy rain at times
29° /27° 5.4 mm 6
23 Aug. Sunny
Sunny
29° /27° 6.1 mm 7
24 Aug. Patchy rain possible
Patchy rain possible
29° /27° 5.7 mm 6
25 Aug. Cloudy
Cloudy
29° /27° 6.5 mm 6
26 Aug. Patchy rain possible
Patchy rain possible
30° /27° 3 mm 7
27 Aug. Patchy rain possible
Patchy rain possible
29° /27° 6.1 mm 7
28 Aug. Partly cloudy
Partly cloudy
29° /26° 7.2 mm 7
29 Aug. Thundery outbreaks possible
Thundery outbreaks possible
30° /26° 3.1 mm 7
30 Aug. Patchy rain possible
Patchy rain possible
29° /28° 3 mm 7
31 Aug. Light rain shower
Light rain shower
30° /28° 2.1 mm 7
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Important Notice
Our weather forecast for Ko Samui in August 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 Ko Samui forecast closer to your planned date for the most up-to-date weather information.

Ko Samui in August - FAQ

What are the expected maximum and minimum temperatures in Ko Samui during August?
During August, expect a variety of temperatures with highs around 29° and lows near 27°, suitable for diverse activities and preferences.
How much rainfall should be expected in Ko Samui during August?
Significant rainfall exceeding 199.7 mm is expected in Ko Samui during August, occurring over more than 29 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Ko Samui during August?
The average wind speed in Ko Samui during August is 24 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Ko Samui in August?

As you prepare for your trip to Ko Samui in August, 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 Ko Samui, during August, 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
    • Sandals/Flip-flops: Comfortable for warm climates
  • 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 Ko Samui?

Get accurate weather forecasts for Ko Samui, located at latitude 9.536 and longitude 99.936. Stay updated with localized weather information tailored for Ko Samui.

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