Koh Samui (Thailand) weather
Find a forecast
Forecast days
-
Maximum daytime temperature: 27° Celsius; Minimum nighttime temperature: 21° Celsius;
Maximum daytime temperature: 27° Celsius; Minimum nighttime temperature: 21° Celsius; -
Maximum daytime temperature: 27° Celsius; Minimum nighttime temperature: 19° Celsius;
Maximum daytime temperature: 27° Celsius; Minimum nighttime temperature: 19° Celsius;
-
Maximum daytime temperature: 28° Celsius; Minimum nighttime temperature: 19° Celsius;
Maximum daytime temperature: 28° Celsius; Minimum nighttime temperature: 19° Celsius;
-
Maximum daytime temperature: 28° Celsius; Minimum nighttime temperature: 20° Celsius;
Maximum daytime temperature: 28° Celsius; Minimum nighttime temperature: 20° Celsius;
-
Maximum daytime temperature: 28° Celsius; Minimum nighttime temperature: 20° Celsius;
Maximum daytime temperature: 28° Celsius; Minimum nighttime temperature: 20° Celsius;
-
Maximum daytime temperature: 28° Celsius; Minimum nighttime temperature: 20° Celsius;
Maximum daytime temperature: 28° Celsius; Minimum nighttime temperature: 20° Celsius;
-
Maximum daytime temperature: 28° Celsius; Minimum nighttime temperature: 19° Celsius;
Maximum daytime temperature: 28° Celsius; Minimum nighttime temperature: 19° Celsius;
Sunny.
Sunrise:
Sunset:
VH UV
No pollution data.
No pollen data.
7 day forecast for Koh Samui
Today (17 December 2025)
| Time |
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%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
10%
|
<5%
|
| Temperature |
26°
|
26°
|
26°
|
26°
|
26°
|
26°
|
25°
|
24°
|
24°
|
24°
|
23°
|
23°
|
23°
|
| Feels like temperature (°C) |
27°
|
28°
|
27°
|
26°
|
25°
|
24°
|
24°
|
22°
|
22°
|
22°
|
22°
|
22°
|
22°
|
| Wind direction and speed |
NE
10
|
NE
10
|
NE
12
|
NE
14
|
NE
16
|
NE
16
|
ENE
17
|
ENE
17
|
ENE
16
|
ENE
16
|
ENE
15
|
NE
14
|
NE
12
|
| Wind gust (mph) |
14
|
16
|
19
|
22
|
23
|
23
|
23
|
23
|
22
|
21
|
20
|
18
|
17
|
| Visibility |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
85%
|
84%
|
84%
|
82%
|
77%
|
76%
|
75%
|
74%
|
75%
|
75%
|
75%
|
75%
|
76%
|
| UV | 9 | 9 | 8 | 6 | 4 | 2 | 1 | - | - | - | - | - | - |
Friday (18 December 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 |
<5%
|
<5%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
<5%
|
10%
|
<5%
|
10%
|
<5%
|
10%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
23°
|
22°
|
22°
|
22°
|
22°
|
21°
|
21°
|
22°
|
24°
|
25°
|
25°
|
27°
|
26°
|
27°
|
26°
|
26°
|
26°
|
25°
|
24°
|
24°
|
23°
|
23°
|
22°
|
22°
|
| Feels like temperature (°C) |
22°
|
22°
|
21°
|
21°
|
21°
|
21°
|
21°
|
22°
|
24°
|
25°
|
25°
|
27°
|
26°
|
27°
|
26°
|
25°
|
24°
|
24°
|
23°
|
22°
|
22°
|
22°
|
21°
|
21°
|
| Wind direction and speed (mph) |
NE
11
|
NE
10
|
NE
10
|
NE
10
|
NE
9
|
NNE
9
|
NNE
10
|
NNE
11
|
NE
11
|
NE
12
|
NE
12
|
NE
13
|
NE
14
|
NE
15
|
NE
16
|
NE
17
|
NE
16
|
NE
16
|
NE
15
|
NE
14
|
NE
13
|
NE
12
|
NE
12
|
NE
10
|
| Wind gust (mph) |
15
|
15
|
14
|
13
|
13
|
13
|
13
|
15
|
16
|
17
|
17
|
19
|
21
|
21
|
23
|
22
|
22
|
21
|
20
|
19
|
18
|
17
|
15
|
13
|
| 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%
|
77%
|
78%
|
79%
|
79%
|
81%
|
81%
|
82%
|
81%
|
81%
|
82%
|
82%
|
81%
|
78%
|
78%
|
77%
|
76%
|
75%
|
75%
|
75%
|
75%
|
75%
|
76%
|
76%
|
| UV | - | - | - | - | - | - | - | 1 | 2 | 5 | 7 | 9 | 10 | 9 | 6 | 4 | 2 | 1 | - | - | - | - | - | - |
Saturday (19 December 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 |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
22°
|
21°
|
20°
|
20°
|
20°
|
20°
|
20°
|
21°
|
23°
|
25°
|
26°
|
27°
|
27°
|
27°
|
27°
|
27°
|
26°
|
25°
|
24°
|
24°
|
23°
|
23°
|
22°
|
22°
|
| Feels like temperature (°C) |
21°
|
21°
|
20°
|
20°
|
20°
|
20°
|
19°
|
21°
|
23°
|
25°
|
27°
|
29°
|
29°
|
28°
|
28°
|
27°
|
26°
|
25°
|
23°
|
22°
|
22°
|
22°
|
22°
|
21°
|
| Wind direction and speed (mph) |
NE
8
|
NE
7
|
NE
6
|
NE
6
|
NNE
6
|
N
6
|
N
7
|
NNE
7
|
NNE
8
|
NNE
8
|
NNE
9
|
NNE
9
|
NNE
9
|
NNE
10
|
NNE
10
|
NNE
11
|
NNE
12
|
NNE
12
|
NNE
13
|
NE
14
|
NE
13
|
NE
12
|
NE
11
|
NE
9
|
| Wind gust (mph) |
12
|
10
|
9
|
9
|
9
|
10
|
10
|
10
|
11
|
12
|
13
|
13
|
14
|
15
|
15
|
17
|
17
|
18
|
19
|
19
|
18
|
17
|
15
|
13
|
| 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%
|
76%
|
75%
|
76%
|
76%
|
76%
|
78%
|
78%
|
77%
|
78%
|
79%
|
81%
|
81%
|
79%
|
78%
|
77%
|
76%
|
75%
|
75%
|
75%
|
75%
|
75%
|
75%
|
75%
|
| UV | - | - | - | - | - | - | - | 1 | 2 | 5 | 7 | 9 | 10 | 9 | 6 | 4 | 2 | 1 | - | - | - | - | - | - |
Sunday (20 December 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 |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
21°
|
21°
|
20°
|
20°
|
20°
|
20°
|
20°
|
21°
|
23°
|
25°
|
26°
|
27°
|
28°
|
28°
|
28°
|
27°
|
27°
|
26°
|
25°
|
24°
|
23°
|
23°
|
23°
|
22°
|
| Feels like temperature (°C) |
21°
|
21°
|
20°
|
20°
|
20°
|
20°
|
20°
|
21°
|
24°
|
26°
|
27°
|
29°
|
29°
|
29°
|
29°
|
27°
|
27°
|
25°
|
23°
|
22°
|
22°
|
22°
|
22°
|
22°
|
| Wind direction and speed (mph) |
NE
8
|
NE
6
|
NE
5
|
NNE
5
|
N
6
|
N
6
|
N
7
|
N
7
|
NNE
8
|
NNE
9
|
NNE
9
|
NNE
10
|
NNE
9
|
NNE
10
|
NNE
10
|
NNE
11
|
NNE
12
|
NNE
13
|
NNE
14
|
NE
13
|
NE
13
|
NE
12
|
NE
11
|
NE
10
|
| Wind gust (mph) |
10
|
9
|
8
|
9
|
10
|
10
|
11
|
11
|
12
|
13
|
14
|
14
|
13
|
14
|
15
|
17
|
18
|
18
|
18
|
18
|
17
|
17
|
15
|
13
|
| 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 |
75%
|
75%
|
75%
|
75%
|
76%
|
76%
|
76%
|
77%
|
77%
|
77%
|
78%
|
78%
|
77%
|
76%
|
76%
|
75%
|
75%
|
73%
|
73%
|
73%
|
74%
|
74%
|
74%
|
74%
|
| UV | - | - | - | - | - | - | - | 1 | 2 | 5 | 7 | 9 | 10 | 9 | 6 | 4 | 2 | 1 | - | - | - | - | - | - |
Monday (21 December 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 |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
<5%
|
<5%
|
10%
|
10%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
22°
|
21°
|
20°
|
20°
|
20°
|
20°
|
20°
|
21°
|
23°
|
25°
|
26°
|
27°
|
28°
|
27°
|
27°
|
26°
|
26°
|
25°
|
24°
|
24°
|
23°
|
23°
|
23°
|
22°
|
| Feels like temperature (°C) |
21°
|
21°
|
20°
|
20°
|
20°
|
20°
|
20°
|
21°
|
24°
|
25°
|
27°
|
28°
|
28°
|
27°
|
27°
|
26°
|
25°
|
24°
|
23°
|
22°
|
22°
|
22°
|
22°
|
22°
|
| Wind direction and speed (mph) |
NE
8
|
NE
7
|
NNE
6
|
NNE
6
|
NNE
7
|
NNE
7
|
NNE
7
|
NNE
8
|
NNE
9
|
NNE
10
|
NNE
11
|
NNE
11
|
NNE
13
|
NNE
13
|
NNE
13
|
NNE
14
|
NE
15
|
NE
15
|
NE
15
|
NE
13
|
NE
13
|
NE
12
|
NE
11
|
NE
10
|
| Wind gust (mph) |
11
|
10
|
9
|
10
|
11
|
11
|
11
|
13
|
13
|
15
|
16
|
17
|
19
|
19
|
19
|
21
|
21
|
21
|
19
|
19
|
18
|
16
|
15
|
13
|
| 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 |
74%
|
75%
|
75%
|
76%
|
76%
|
76%
|
75%
|
76%
|
76%
|
76%
|
75%
|
75%
|
76%
|
76%
|
76%
|
75%
|
75%
|
74%
|
74%
|
75%
|
75%
|
75%
|
75%
|
75%
|
| UV | - | - | - | - | - | - | - | 1 | 2 | 5 | 7 | 9 | 10 | 9 | 6 | 4 | 2 | 1 | - | - | - | - | - | - |
Tuesday (22 December 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 |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
22°
|
21°
|
21°
|
20°
|
20°
|
20°
|
21°
|
21°
|
26°
|
28°
|
26°
|
24°
|
23°
|
| Feels like temperature (°C) |
22°
|
21°
|
21°
|
20°
|
20°
|
20°
|
20°
|
21°
|
26°
|
28°
|
26°
|
22°
|
22°
|
| Wind direction and speed (mph) |
NE
8
|
NE
7
|
NE
6
|
NNE
6
|
N
6
|
N
6
|
N
7
|
N
7
|
NNE
10
|
NNE
12
|
NNE
12
|
NE
13
|
NE
11
|
| Wind gust (mph) |
12
|
10
|
10
|
9
|
10
|
10
|
11
|
15
|
17
|
18
|
19
|
18
|
16
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
75%
|
75%
|
75%
|
75%
|
75%
|
75%
|
74%
|
75%
|
76%
|
75%
|
74%
|
74%
|
73%
|
| UV | - | - | - | - | - | - | - | 1 | 7 | 9 | 2 | - | - |
Wednesday (23 December 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
10%
|
<5%
|
10%
|
<5%
|
<5%
|
| Temperature (°C) |
21°
|
20°
|
21°
|
26°
|
28°
|
26°
|
24°
|
22°
|
| Feels like temperature (°C) |
21°
|
20°
|
21°
|
27°
|
29°
|
27°
|
23°
|
22°
|
| Wind direction and speed (mph) |
NE
7
|
NNE
5
|
N
7
|
N
10
|
N
11
|
NNE
11
|
NE
12
|
NE
10
|
| Wind gust (mph) |
11
|
11
|
14
|
16
|
17
|
18
|
17
|
14
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
73%
|
74%
|
74%
|
75%
|
75%
|
73%
|
72%
|
72%
|
| UV | - | - | 1 | 7 | 9 | 2 | - | - |
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Updated 00:32 (UTC) on Thu 18 Dec 2025
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