weathercrisp.com
Ko Samui
BangkokChanthaburiChiang MaiChiang RaiChumphonHat YaiHua HinKanchanaburiKhao YoiKo ChangKo Hat Na Ka YaKo LantaKo PananKo Samet
Ko Samui
Ko Si ChangKoh LipeKoh PhanganKoh TaoKrabiMae Hong SonNakhon RatchasimaNong KhaiPaiPattayaPhang NgaPhayaoPhitsanulokPhuketSamut PrakanSongkhlaSukhothaiSurat ThaniTrangUdon Thani More Locations
Thailand weather

Weather in Ko Samui for August 2026

Your guide to Ko Samui weather in August - trends and predictions

    Temperatures

  • The forecast for the first days of August 2026 in Ko Samui predicts temperatures to be around 29 °C, close to the historical average.

  • In general, the average temperature in Ko Samui at the beginning of August is 28.9 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 29.1 °C by the end of August.

    • Rain 🌧️

  • Ko Samui experiences heavy rainfall in August, with over 20 rainy days and an average total precipitation 136.1 mm.

    • More

  • 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
0
Dry days
Average rainy days
31
Rainy days
Average snowy days
0
Snow days
Average temperatures
29°/27°
Temperatures
Average wind speed
23 km/h
Avg max wind
Average humidity
73 %
Avg humidity

Ko Samui Weather August

Move between months or click on a day
July
September
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
29°
2
Patchy rain possible
29°
3
Patchy rain possible
28°
4
Patchy rain possible
29°
5
Patchy rain possible
29°
6
Light rain shower
29°
7
Cloudy
29°
8
Patchy rain possible
30°
9
Moderate or heavy rain shower
30°
10
Patchy rain possible
30°
11
Moderate or heavy rain shower
30°
12
Patchy rain possible
29°
13
Patchy rain possible
30°
14
Heavy rain at times
30°
15
Moderate or heavy rain shower
29°
16
Moderate or heavy rain shower
28°
17
Patchy rain possible
29°
18
Patchy rain possible
29°
19
Patchy rain possible
29°
20
Moderate or heavy rain shower
29°
21
Patchy rain possible
29°
22
Moderate or heavy rain shower
29°
23
Light rain shower
29°
24
Moderate or heavy rain shower
29°
25
Light rain shower
29°
26
Patchy rain possible
30°
27
Light rain shower
29°
28
Moderate rain at times
29°
29
Heavy rain at times
29°
30
Moderate or heavy rain shower
29°
31
Moderate or heavy rain shower
29°

Temperatures trend during August in Ko Samui

See the weather trend as well as the moving average line

August weather in Ko Samui day by day

Click on a date for more information
July September
Date Weather Temperatures Rain UV More
1 Aug. Patchy rain possible
Patchy rain possible
 29° /28° 5.7 mm 6
2 Aug. Patchy rain possible
Patchy rain possible
 29° /28° 3 mm 7
3 Aug. Patchy rain possible
Patchy rain possible
 28° /27° 1.1 mm 7
4 Aug. Patchy rain possible
Patchy rain possible
 29° /27° 1.4 mm 6
5 Aug. Patchy rain possible
Patchy rain possible
 29° /27° 1.3 mm 6
6 Aug. Light rain shower
Light rain shower
 29° /27° 3.2 mm 6
7 Aug. Cloudy
Cloudy
 29° /27° 4.1 mm 6
8 Aug. Patchy rain possible
Patchy rain possible
 30° /27° 3.7 mm 6
9 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /27° 5.8 mm 6
10 Aug. Patchy rain possible
Patchy rain possible
 30° /27° 2.5 mm 6
11 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /27° 5.9 mm 6
12 Aug. Patchy rain possible
Patchy rain possible
 29° /27° 2.9 mm 6
13 Aug. Patchy rain possible
Patchy rain possible
 30° /26° 4.1 mm 6
14 Aug. Heavy rain at times
Heavy rain at times
 30° /27° 5.3 mm 6
15 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /26° 5.6 mm 6
16 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
 28° /26° 9.6 mm 6
17 Aug. Patchy rain possible
Patchy rain possible
 29° /26° 3.2 mm 6
18 Aug. Patchy rain possible
Patchy rain possible
 29° /26° 1.8 mm 6
19 Aug. Patchy rain possible
Patchy rain possible
 29° /26° 2.1 mm 6
20 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /26° 5.2 mm 6
21 Aug. Patchy rain possible
Patchy rain possible
 29° /26° 4.8 mm 6
22 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /26° 9.3 mm 6
23 Aug. Light rain shower
Light rain shower
 29° /27° 6.6 mm 6
24 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /26° 4.9 mm 6
25 Aug. Light rain shower
Light rain shower
 29° /26° 5.6 mm 6
26 Aug. Patchy rain possible
Patchy rain possible
 30° /27° 3.3 mm 6
27 Aug. Light rain shower
Light rain shower
 29° /26° 5.1 mm 6
28 Aug. Moderate rain at times
Moderate rain at times
 29° /26° 4.7 mm 6
29 Aug. Heavy rain at times
Heavy rain at times
 29° /26° 5.9 mm 6
30 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /26° 3.8 mm 6
31 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /27° 4.4 mm 6
Next
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.
Change Month
‹
›

Ko Samui weather in August vs July vs September

Compare August weather in Ko Samui with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
JulyAugustSeptember
WeatherPatchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Temperatures29°/27°29°/27°29°/27°
Rainfall121 mm136 mm152 mm
Wind26 km/h23 km/h25.9 km/h
Humidity73%73%74%
Rainy days31 days31 days29 days
Dry days0 days0 days1 days

Planning a trip to Ko Samui? Discover the best time to visit

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 136.1 mm is expected in Ko Samui during August, occurring over more than 31 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 23 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in Ko Samui

Explore the daily rainfall trends and prepare for Ko Samuis August weather 💧
Typically, Ko Samui has 31 rainy days in August with a total of 136.1 mm of rainfall.

UV exposure in Ko Samui during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️

What to pack to Ko Samui in August?

🌦️ Warm & sunny · highs around 29 °C, frequent showers

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.

0%
0 / 9

🧥 Clothing

👟 Footwear

🎒 Accessories

🧴 Personal Items

Quick links

More Ko Samui weather pages
You are here
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.

Related locations
Select a location for accurate weather forecast
BaliBangkokHua HinKrabiPhuket
More Locations
Found a mistake?
We appreciate your attention to details. Tell us here.