Koh Samui (Thailand) weather
Find a forecast
Forecast days
-
Maximum daytime temperature: 27° Celsius; Minimum nighttime temperature: 22° Celsius;
Maximum daytime temperature: 27 degrees Celsius; Minimum nighttime temperature: 22 degrees Celsius; -
Maximum daytime temperature: 29° Celsius; Minimum nighttime temperature: 22° Celsius;
Maximum daytime temperature: 29 degrees Celsius; Minimum nighttime temperature: 22 degrees Celsius;
-
Maximum daytime temperature: 29° Celsius; Minimum nighttime temperature: 22° Celsius;
Maximum daytime temperature: 29 degrees Celsius; Minimum nighttime temperature: 22 degrees Celsius;
-
Maximum daytime temperature: 28° Celsius; Minimum nighttime temperature: 22° Celsius;
Maximum daytime temperature: 28 degrees Celsius; Minimum nighttime temperature: 22 degrees Celsius; -
Maximum daytime temperature: 28° Celsius; Minimum nighttime temperature: 22° Celsius;
Maximum daytime temperature: 28 degrees Celsius; Minimum nighttime temperature: 22 degrees Celsius;
-
Maximum daytime temperature: 28° Celsius; Minimum nighttime temperature: 22° Celsius;
Maximum daytime temperature: 28 degrees Celsius; Minimum nighttime temperature: 22 degrees Celsius; -
Maximum daytime temperature: 28° Celsius; Minimum nighttime temperature: 22° Celsius;
Maximum daytime temperature: 28 degrees Celsius; Minimum nighttime temperature: 22 degrees Celsius;
Light showers changing to clear by nighttime.
Sunrise:
Sunset:
Ex UV
No pollution data.
No pollen data.
7 day forecast for Koh Samui
Today (15 September 2026)
| Time |
17:00
|
18:00
|
19:00
|
20:00
|
21:00
|
22:00
|
23:00
|
|---|---|---|---|---|---|---|---|
| Weather symbols |  |
 |
|
|
 |
 |
|
| Chance of precipitation |
70%
|
80%
|
60%
|
60%
|
40%
|
40%
|
30%
|
| Temperature |
26°
|
25°
|
24°
|
24°
|
23°
|
23°
|
23°
|
| Feels like temperature (°C) |
25°
|
23°
|
22°
|
22°
|
22°
|
21°
|
21°
|
| Wind direction and speed |
NW
14
|
WNW
15
|
WNW
16
|
WNW
16
|
W
15
|
W
14
|
W
14
|
| Wind gust (mph) |
21
|
22
|
21
|
20
|
20
|
19
|
18
|
| Visibility |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
76%
|
76%
|
76%
|
76%
|
76%
|
77%
|
77%
|
| UV | 1 | - | - | - | - | - | - |
Thursday (16 September 2026)
| 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 |
30%
|
20%
|
20%
|
20%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
10%
|
10%
|
20%
|
50%
|
60%
|
40%
|
50%
|
50%
|
40%
|
30%
|
30%
|
20%
|
20%
|
| Temperature (°C) |
23°
|
22°
|
22°
|
22°
|
22°
|
22°
|
22°
|
23°
|
24°
|
26°
|
27°
|
29°
|
29°
|
29°
|
28°
|
26°
|
27°
|
26°
|
25°
|
24°
|
24°
|
24°
|
24°
|
23°
|
| Feels like temperature (°C) |
21°
|
21°
|
21°
|
21°
|
21°
|
20°
|
21°
|
21°
|
23°
|
25°
|
27°
|
29°
|
30°
|
30°
|
29°
|
26°
|
27°
|
26°
|
25°
|
23°
|
23°
|
22°
|
22°
|
22°
|
| Wind direction and speed (mph) |
W
13
|
WSW
13
|
WSW
13
|
WSW
13
|
WSW
13
|
WSW
13
|
WSW
13
|
WSW
13
|
WSW
13
|
WSW
13
|
WSW
13
|
WSW
13
|
WSW
12
|
W
12
|
W
12
|
W
12
|
W
12
|
W
13
|
W
13
|
W
13
|
W
14
|
WSW
14
|
WSW
14
|
W
15
|
| Wind gust (mph) |
18
|
18
|
17
|
17
|
18
|
17
|
17
|
17
|
17
|
17
|
17
|
16
|
16
|
16
|
16
|
17
|
17
|
18
|
18
|
18
|
19
|
19
|
19
|
19
|
| 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 |
77%
|
78%
|
78%
|
78%
|
78%
|
77%
|
77%
|
77%
|
77%
|
76%
|
76%
|
75%
|
75%
|
75%
|
75%
|
75%
|
75%
|
75%
|
75%
|
75%
|
75%
|
76%
|
76%
|
76%
|
| UV | - | - | - | - | - | - | - | 1 | 3 | 7 | 10 | 11 | 12 | 10 | 8 | 4 | 2 | 1 | - | - | - | - | - | - |
Friday (17 September 2026)
| 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 |
20%
|
20%
|
10%
|
10%
|
20%
|
10%
|
10%
|
10%
|
10%
|
20%
|
20%
|
30%
|
30%
|
30%
|
40%
|
50%
|
60%
|
60%
|
50%
|
60%
|
50%
|
50%
|
40%
|
40%
|
| Temperature (°C) |
23°
|
23°
|
23°
|
23°
|
23°
|
22°
|
22°
|
23°
|
25°
|
26°
|
27°
|
29°
|
28°
|
28°
|
27°
|
27°
|
26°
|
26°
|
25°
|
24°
|
24°
|
23°
|
23°
|
23°
|
| Feels like temperature (°C) |
21°
|
21°
|
21°
|
21°
|
21°
|
21°
|
21°
|
22°
|
24°
|
26°
|
28°
|
29°
|
28°
|
29°
|
27°
|
27°
|
27°
|
25°
|
24°
|
23°
|
22°
|
22°
|
21°
|
21°
|
| Wind direction and speed (mph) |
WSW
15
|
WSW
15
|
WSW
14
|
WSW
15
|
WSW
15
|
WSW
15
|
WSW
15
|
WSW
15
|
WSW
15
|
WSW
14
|
WSW
13
|
W
12
|
W
12
|
W
12
|
W
12
|
W
12
|
W
12
|
W
13
|
WSW
14
|
WSW
14
|
WSW
14
|
WSW
15
|
WSW
15
|
WSW
15
|
| Wind gust (mph) |
19
|
19
|
19
|
20
|
20
|
20
|
20
|
19
|
19
|
18
|
17
|
17
|
17
|
17
|
17
|
17
|
17
|
18
|
19
|
19
|
20
|
20
|
20
|
20
|
| 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%
|
78%
|
79%
|
81%
|
81%
|
82%
|
83%
|
83%
|
81%
|
79%
|
77%
|
76%
|
75%
|
75%
|
76%
|
76%
|
76%
|
75%
|
76%
|
77%
|
76%
|
77%
|
78%
|
78%
|
| UV | - | - | - | - | - | - | - | 1 | 3 | 7 | 10 | 12 | 12 | 10 | 8 | 5 | 2 | 1 | - | - | - | - | - | - |
Saturday (18 September 2026)
| 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 |
20%
|
40%
|
30%
|
30%
|
30%
|
20%
|
30%
|
30%
|
40%
|
40%
|
40%
|
40%
|
30%
|
40%
|
40%
|
60%
|
60%
|
50%
|
60%
|
60%
|
50%
|
50%
|
40%
|
30%
|
| Temperature (°C) |
23°
|
23°
|
23°
|
23°
|
22°
|
22°
|
22°
|
23°
|
24°
|
26°
|
27°
|
28°
|
28°
|
27°
|
27°
|
26°
|
26°
|
26°
|
25°
|
24°
|
24°
|
23°
|
23°
|
23°
|
| Feels like temperature (°C) |
21°
|
21°
|
21°
|
21°
|
21°
|
21°
|
21°
|
22°
|
23°
|
25°
|
27°
|
28°
|
28°
|
27°
|
27°
|
26°
|
26°
|
25°
|
24°
|
23°
|
22°
|
22°
|
21°
|
21°
|
| Wind direction and speed (mph) |
WSW
15
|
WSW
15
|
WSW
15
|
WSW
16
|
WSW
16
|
WSW
16
|
WSW
15
|
WSW
15
|
WSW
14
|
WSW
13
|
WSW
13
|
W
13
|
W
13
|
WNW
13
|
WNW
13
|
WNW
13
|
W
13
|
W
13
|
W
13
|
WSW
14
|
WSW
15
|
WSW
15
|
WSW
16
|
WSW
15
|
| Wind gust (mph) |
20
|
20
|
21
|
21
|
21
|
20
|
20
|
20
|
19
|
18
|
18
|
18
|
17
|
18
|
17
|
17
|
18
|
18
|
19
|
19
|
20
|
20
|
20
|
20
|
| 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 |
79%
|
80%
|
82%
|
83%
|
83%
|
84%
|
83%
|
83%
|
82%
|
82%
|
78%
|
77%
|
76%
|
76%
|
77%
|
77%
|
77%
|
78%
|
77%
|
78%
|
78%
|
77%
|
78%
|
79%
|
| UV | - | - | - | - | - | - | - | 1 | 3 | 6 | 8 | 11 | 11 | 9 | 7 | 5 | 2 | 1 | - | - | - | - | - | - |
Sunday (19 September 2026)
| 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 |
40%
|
30%
|
20%
|
40%
|
20%
|
30%
|
30%
|
30%
|
20%
|
20%
|
30%
|
30%
|
40%
|
30%
|
40%
|
60%
|
60%
|
50%
|
50%
|
40%
|
40%
|
40%
|
30%
|
20%
|
| Temperature (°C) |
23°
|
23°
|
23°
|
22°
|
22°
|
22°
|
22°
|
23°
|
24°
|
25°
|
27°
|
28°
|
28°
|
26°
|
27°
|
26°
|
27°
|
26°
|
25°
|
24°
|
24°
|
24°
|
24°
|
23°
|
| Feels like temperature (°C) |
21°
|
21°
|
21°
|
21°
|
21°
|
21°
|
21°
|
22°
|
23°
|
25°
|
27°
|
29°
|
29°
|
27°
|
28°
|
27°
|
27°
|
26°
|
24°
|
23°
|
23°
|
23°
|
23°
|
22°
|
| Wind direction and speed (mph) |
WSW
15
|
WSW
16
|
WSW
16
|
W
15
|
W
15
|
W
15
|
WSW
15
|
W
14
|
W
13
|
W
13
|
W
12
|
W
11
|
W
11
|
W
12
|
W
11
|
W
11
|
W
11
|
W
12
|
W
14
|
W
13
|
W
12
|
WSW
12
|
WSW
12
|
WSW
12
|
| Wind gust (mph) |
21
|
21
|
21
|
20
|
20
|
20
|
19
|
18
|
17
|
17
|
16
|
16
|
16
|
16
|
16
|
16
|
17
|
17
|
17
|
17
|
17
|
16
|
17
|
17
|
| 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 |
79%
|
81%
|
83%
|
83%
|
83%
|
83%
|
82%
|
83%
|
82%
|
81%
|
79%
|
79%
|
79%
|
78%
|
78%
|
77%
|
76%
|
76%
|
76%
|
76%
|
76%
|
76%
|
76%
|
76%
|
| UV | - | - | - | - | - | - | - | 1 | 3 | 5 | 9 | 11 | 11 | 11 | 8 | 5 | 2 | 1 | - | - | - | - | - | - |
Monday (20 September 2026)
| 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 |
20%
|
20%
|
20%
|
30%
|
20%
|
30%
|
30%
|
20%
|
30%
|
60%
|
60%
|
30%
|
30%
|
| Temperature (°C) |
23°
|
23°
|
23°
|
23°
|
22°
|
22°
|
22°
|
23°
|
26°
|
27°
|
26°
|
24°
|
24°
|
| Feels like temperature (°C) |
22°
|
22°
|
22°
|
21°
|
21°
|
21°
|
21°
|
22°
|
27°
|
29°
|
27°
|
25°
|
23°
|
| Wind direction and speed (mph) |
WSW
12
|
WSW
13
|
WSW
12
|
WSW
13
|
WSW
13
|
WSW
13
|
WSW
12
|
WSW
11
|
W
11
|
WNW
9
|
W
8
|
WSW
8
|
WSW
10
|
| Wind gust (mph) |
17
|
17
|
18
|
17
|
17
|
17
|
15
|
17
|
15
|
13
|
13
|
13
|
16
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
77%
|
78%
|
78%
|
77%
|
78%
|
77%
|
77%
|
78%
|
78%
|
77%
|
77%
|
76%
|
76%
|
| UV | - | - | - | - | - | - | - | 1 | 6 | 8 | 1 | - | - |
Tuesday (21 September 2026)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
 |
|
|
| Chance of precipitation |
30%
|
40%
|
40%
|
40%
|
70%
|
60%
|
60%
|
50%
|
| Temperature (°C) |
23°
|
23°
|
23°
|
26°
|
27°
|
26°
|
24°
|
23°
|
| Feels like temperature (°C) |
22°
|
22°
|
22°
|
26°
|
28°
|
26°
|
24°
|
23°
|
| Wind direction and speed (mph) |
WSW
11
|
WSW
12
|
WSW
12
|
WSW
11
|
WSW
10
|
WSW
10
|
WSW
10
|
SW
10
|
| Wind gust (mph) |
18
|
18
|
16
|
16
|
16
|
17
|
17
|
19
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
78%
|
79%
|
81%
|
77%
|
76%
|
79%
|
81%
|
82%
|
| UV | - | - | 1 | 9 | 7 | 1 | - | - |
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Forecast for 6pm (UTC+7) Wednesday
Updated 01:32 (UTC+1) on Wed 16 Sep 2026
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