Koh Samui (Thailand) weather
Find a forecast
Forecast days
-
Maximum daytime temperature: 29° Celsius; Minimum nighttime temperature: 23° Celsius;
Maximum daytime temperature: 29° Celsius; Minimum nighttime temperature: 23° Celsius; -
Maximum daytime temperature: 30° Celsius; Minimum nighttime temperature: 23° Celsius;
Maximum daytime temperature: 30° Celsius; Minimum nighttime temperature: 23° Celsius;
-
Maximum daytime temperature: 30° Celsius; Minimum nighttime temperature: 23° Celsius;
Maximum daytime temperature: 30° Celsius; Minimum nighttime temperature: 23° Celsius; -
Maximum daytime temperature: 29° Celsius; Minimum nighttime temperature: 23° Celsius;
Maximum daytime temperature: 29° Celsius; Minimum nighttime temperature: 23° Celsius;
-
Maximum daytime temperature: 29° Celsius; Minimum nighttime temperature: 23° Celsius;
Maximum daytime temperature: 29° Celsius; Minimum nighttime temperature: 23° Celsius;
-
Maximum daytime temperature: 30° Celsius; Minimum nighttime temperature: 23° Celsius;
Maximum daytime temperature: 30° Celsius; Minimum nighttime temperature: 23° Celsius;
-
Maximum daytime temperature: 30° Celsius; Minimum nighttime temperature: 23° Celsius;
Maximum daytime temperature: 30° Celsius; Minimum nighttime temperature: 23° Celsius;
Sunny changing to partly cloudy by early evening.
Sunrise:
Sunset:
Ex UV
No pollution data.
No pollen data.
7 day forecast for Koh Samui
Today (31 August 2025)
| Time |
10:00
|
11:00
|
12:00
|
13:00
|
14:00
|
15:00
|
16:00
|
17:00
|
18:00
|
19:00
|
20:00
|
21:00
|
22:00
|
23:00
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols |  |
|
|
|
|
|
|
|
 |
|
|
|
|
|
| Chance of precipitation |
30%
|
20%
|
30%
|
10%
|
10%
|
20%
|
30%
|
20%
|
20%
|
20%
|
10%
|
<5%
|
<5%
|
10%
|
| Temperature |
27°
|
27°
|
28°
|
28°
|
27°
|
28°
|
28°
|
27°
|
26°
|
25°
|
24°
|
24°
|
24°
|
24°
|
| Feels like temperature (°C) |
26°
|
26°
|
27°
|
27°
|
26°
|
27°
|
27°
|
26°
|
25°
|
23°
|
23°
|
22°
|
22°
|
22°
|
| Wind direction and speed |
WSW
17
|
WSW
17
|
WSW
17
|
WSW
16
|
WSW
18
|
WSW
18
|
WSW
18
|
WSW
18
|
WSW
17
|
WSW
17
|
WSW
17
|
WSW
16
|
WSW
15
|
WSW
15
|
| Wind gust (mph) |
24
|
24
|
24
|
24
|
25
|
26
|
24
|
24
|
23
|
23
|
23
|
21
|
21
|
21
|
| Visibility |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
78%
|
76%
|
76%
|
75%
|
75%
|
75%
|
74%
|
74%
|
74%
|
75%
|
75%
|
75%
|
75%
|
76%
|
| UV | 8 | 11 | 12 | 11 | 6 | 4 | 2 | 1 | - | - | - | - | - | - |
Tuesday (1 September 2025)
| Time |
00:00
|
01:00
|
02:00
|
03:00
|
04:00
|
05:00
|
06:00
|
07:00
|
08:00
|
09:00
|
10:00
|
11:00
|
12:00
|
13:00
|
14:00
|
15:00
|
16:00
|
17:00
|
18:00
|
19:00
|
20:00
|
21:00
|
22:00
|
23:00
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
10%
|
10%
|
10%
|
10%
|
10%
|
20%
|
20%
|
10%
|
10%
|
<5%
|
<5%
|
10%
|
10%
|
10%
|
10%
|
10%
|
<5%
|
10%
|
20%
|
10%
|
10%
|
10%
|
10%
|
20%
|
| Temperature (°C) |
24°
|
23°
|
23°
|
23°
|
23°
|
23°
|
23°
|
24°
|
25°
|
26°
|
27°
|
28°
|
28°
|
29°
|
29°
|
28°
|
28°
|
27°
|
27°
|
25°
|
25°
|
24°
|
24°
|
24°
|
| Feels like temperature (°C) |
22°
|
22°
|
22°
|
22°
|
22°
|
22°
|
22°
|
23°
|
24°
|
26°
|
28°
|
29°
|
29°
|
30°
|
30°
|
30°
|
29°
|
28°
|
27°
|
25°
|
24°
|
24°
|
23°
|
23°
|
| Wind direction and speed (mph) |
WSW
15
|
WSW
15
|
WSW
15
|
WSW
14
|
WSW
14
|
WSW
14
|
WSW
14
|
WSW
14
|
WSW
14
|
WSW
13
|
WSW
12
|
WSW
12
|
WSW
11
|
W
11
|
W
10
|
W
10
|
W
10
|
W
11
|
W
11
|
W
12
|
WSW
12
|
WSW
11
|
WSW
11
|
WSW
11
|
| Wind gust (mph) |
21
|
21
|
21
|
20
|
19
|
20
|
20
|
20
|
19
|
17
|
17
|
17
|
16
|
16
|
15
|
15
|
15
|
15
|
16
|
17
|
16
|
16
|
16
|
15
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
76%
|
81%
|
82%
|
83%
|
83%
|
83%
|
83%
|
83%
|
83%
|
81%
|
78%
|
76%
|
76%
|
75%
|
75%
|
75%
|
75%
|
74%
|
74%
|
74%
|
74%
|
75%
|
75%
|
75%
|
| UV | - | - | - | - | - | - | - | 1 | 3 | 6 | 8 | 10 | 10 | 11 | 9 | 5 | 2 | 1 | - | - | - | - | - | - |
Wednesday (2 September 2025)
| Time |
00:00
|
01:00
|
02:00
|
03:00
|
04:00
|
05:00
|
06:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
 |
|
|
|
|
|
|
| Chance of precipitation |
10%
|
10%
|
10%
|
10%
|
10%
|
<5%
|
10%
|
10%
|
10%
|
10%
|
30%
|
20%
|
10%
|
| Temperature (°C) |
24°
|
24°
|
23°
|
23°
|
23°
|
23°
|
23°
|
24°
|
28°
|
28°
|
28°
|
25°
|
24°
|
| Feels like temperature (°C) |
23°
|
23°
|
23°
|
22°
|
22°
|
22°
|
22°
|
23°
|
29°
|
29°
|
29°
|
25°
|
23°
|
| Wind direction and speed (mph) |
W
11
|
W
11
|
WSW
12
|
WSW
12
|
WSW
11
|
WSW
11
|
W
10
|
WSW
11
|
W
11
|
W
10
|
W
10
|
W
11
|
WSW
13
|
| Wind gust (mph) |
16
|
16
|
17
|
16
|
15
|
15
|
16
|
17
|
16
|
16
|
17
|
18
|
20
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
75%
|
76%
|
76%
|
76%
|
76%
|
76%
|
76%
|
76%
|
77%
|
75%
|
75%
|
73%
|
75%
|
| UV | - | - | - | - | - | - | - | 1 | 7 | 10 | 2 | - | - |
Thursday (3 September 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
 |
|
| Chance of precipitation |
30%
|
30%
|
20%
|
30%
|
30%
|
40%
|
50%
|
50%
|
| Temperature (°C) |
24°
|
23°
|
24°
|
27°
|
28°
|
28°
|
25°
|
24°
|
| Feels like temperature (°C) |
22°
|
22°
|
22°
|
27°
|
27°
|
27°
|
23°
|
22°
|
| Wind direction and speed (mph) |
WSW
14
|
W
14
|
W
15
|
W
15
|
W
16
|
W
17
|
W
19
|
W
18
|
| Wind gust (mph) |
22
|
22
|
21
|
22
|
25
|
26
|
26
|
26
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
76%
|
77%
|
78%
|
77%
|
77%
|
75%
|
75%
|
76%
|
| UV | - | - | 1 | 8 | 11 | 2 | - | - |
Friday (4 September 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
30%
|
30%
|
40%
|
30%
|
30%
|
30%
|
40%
|
30%
|
| Temperature (°C) |
24°
|
23°
|
23°
|
27°
|
28°
|
28°
|
25°
|
24°
|
| Feels like temperature (°C) |
21°
|
21°
|
21°
|
26°
|
27°
|
26°
|
23°
|
22°
|
| Wind direction and speed (mph) |
W
19
|
W
17
|
W
17
|
W
17
|
W
17
|
W
19
|
W
19
|
W
17
|
| Wind gust (mph) |
27
|
24
|
24
|
25
|
26
|
28
|
26
|
24
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
78%
|
78%
|
79%
|
78%
|
75%
|
74%
|
73%
|
75%
|
| UV | - | - | 1 | 6 | 10 | 2 | - | - |
Saturday (5 September 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
30%
|
20%
|
20%
|
20%
|
40%
|
40%
|
30%
|
10%
|
| Temperature (°C) |
23°
|
23°
|
23°
|
28°
|
29°
|
28°
|
25°
|
24°
|
| Feels like temperature (°C) |
21°
|
21°
|
22°
|
27°
|
30°
|
28°
|
23°
|
22°
|
| Wind direction and speed (mph) |
WSW
17
|
WSW
16
|
WSW
16
|
WSW
16
|
W
15
|
W
16
|
W
17
|
WSW
17
|
| Wind gust (mph) |
24
|
23
|
23
|
22
|
23
|
25
|
24
|
24
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
77%
|
78%
|
81%
|
76%
|
75%
|
75%
|
74%
|
75%
|
| UV | - | - | 1 | 9 | 11 | 2 | - | - |
Sunday (6 September 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
10%
|
20%
|
20%
|
10%
|
30%
|
50%
|
30%
|
20%
|
| Temperature (°C) |
23°
|
23°
|
23°
|
27°
|
30°
|
28°
|
25°
|
24°
|
| Feels like temperature (°C) |
21°
|
21°
|
22°
|
27°
|
31°
|
27°
|
24°
|
22°
|
| Wind direction and speed (mph) |
WSW
16
|
WSW
16
|
WSW
15
|
WSW
14
|
W
13
|
W
16
|
WSW
16
|
WSW
15
|
| Wind gust (mph) |
23
|
23
|
22
|
20
|
23
|
24
|
23
|
22
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
79%
|
83%
|
83%
|
76%
|
75%
|
74%
|
74%
|
75%
|
| UV | - | - | 1 | 9 | 12 | 2 | - | - |
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Forecast
Forecast for 10:00 (UTC+7), Mon
Updated 01:23 (UTC+1) on Mon 1 Sep 2025
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