Weather Forecast for Koh Samui
Surat Thani, Thailand
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Current Weather - Koh Samui: 33°C
Current Weather - Koh Samui: 33°C
Surat Thani, Thailand
Sunny
Feels like 44°C
Wind
13 km/h E
Humidity
63%
Pressure
1010 mb
UV Index
10
Visibility
10 km
Patchy rain nearby
Friday, April 17, 2026
High
29°C
Low
29°C
Rain Chance
82%
Hourly Forecast
29°C
29°C
29°C
29°C
29°C
33°C
29°C
29°C
29°C
29°C
30°C
30°C
30°C
29°C
30°C
Day Statistics
Maximum Wind
20 km/h
Humidity
71%
Precipitation
0 mm
UV Index
3
Visibility
10 km
Rain Chance
82%
Snow Chance
0%
Sun & Moon
Sunrise
06:09 AM
Sunset
06:30 PM
Moonrise
05:39 AM
Moonset
06:21 PM
Moon Phase
New Moon
Moon Illumination
0%
Air Quality
PM2.5
15.8
μg/m³
PM10
19
μg/m³
NO₂
1.6
μg/m³
O₃
89.3
μg/m³
SO₂
1.6
μg/m³
CO
202
μg/m³
Patchy rain nearby
Saturday, April 18, 2026
High
30°C
Low
28°C
Rain Chance
88%
Hourly Forecast
30°C
29°C
29°C
29°C
29°C
29°C
29°C
28°C
28°C
28°C
28°C
29°C
29°C
29°C
29°C
30°C
30°C
30°C
30°C
30°C
30°C
30°C
30°C
30°C
Day Statistics
Maximum Wind
25 km/h
Humidity
73%
Precipitation
0 mm
UV Index
3
Visibility
10 km
Rain Chance
88%
Snow Chance
0%
Sun & Moon
Sunrise
06:08 AM
Sunset
06:30 PM
Moonrise
06:27 AM
Moonset
07:21 PM
Moon Phase
Waxing Crescent
Moon Illumination
1%
Air Quality
PM2.5
12.8
μg/m³
PM10
15.9
μg/m³
NO₂
1.5
μg/m³
O₃
88.8
μg/m³
SO₂
1.4
μg/m³
CO
209.9
μg/m³
Sunny
Sunday, April 19, 2026
High
30°C
Low
29°C
Rain Chance
0%
Hourly Forecast
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
30°C
30°C
30°C
29°C
29°C
29°C
29°C
30°C
30°C
Day Statistics
Maximum Wind
25 km/h
Humidity
74%
Precipitation
0 mm
UV Index
3
Visibility
10 km
Rain Chance
0%
Snow Chance
0%
Sun & Moon
Sunrise
06:08 AM
Sunset
06:30 PM
Moonrise
07:21 AM
Moonset
08:25 PM
Moon Phase
Waxing Crescent
Moon Illumination
3%
Air Quality
PM2.5
8.6
μg/m³
PM10
10.8
μg/m³
NO₂
1.5
μg/m³
O₃
80.8
μg/m³
SO₂
1.3
μg/m³
CO
178.3
μg/m³
Patchy rain nearby
Monday, April 20, 2026
High
29°C
Low
29°C
Rain Chance
88%
Hourly Forecast
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
30°C
30°C
30°C
29°C
Day Statistics
Maximum Wind
20 km/h
Humidity
73%
Precipitation
2 mm
UV Index
3
Visibility
10 km
Rain Chance
88%
Snow Chance
0%
Sun & Moon
Sunrise
06:08 AM
Sunset
06:30 PM
Moonrise
08:19 AM
Moonset
09:31 PM
Moon Phase
Waxing Crescent
Moon Illumination
9%
Air Quality
PM2.5
10.3
μg/m³
PM10
13.5
μg/m³
NO₂
1.5
μg/m³
O₃
83.1
μg/m³
SO₂
1.3
μg/m³
CO
153.2
μg/m³
Moderate rain
Tuesday, April 21, 2026
High
29°C
Low
28°C
Rain Chance
89%
Hourly Forecast
29°C
29°C
29°C
28°C
28°C
29°C
28°C
28°C
28°C
28°C
28°C
28°C
28°C
28°C
28°C
28°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
Day Statistics
Maximum Wind
17 km/h
Humidity
72%
Precipitation
10 mm
UV Index
3
Visibility
10 km
Rain Chance
89%
Snow Chance
0%
Sun & Moon
Sunrise
06:07 AM
Sunset
06:30 PM
Moonrise
09:23 AM
Moonset
10:37 PM
Moon Phase
Waxing Crescent
Moon Illumination
17%
Patchy rain nearby
Wednesday, April 22, 2026
High
29°C
Low
28°C
Rain Chance
79%
Hourly Forecast
29°C
29°C
29°C
29°C
29°C
29°C
29°C
28°C
28°C
28°C
28°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
30°C
30°C
30°C
29°C
29°C
29°C
Day Statistics
Maximum Wind
19 km/h
Humidity
72%
Precipitation
1 mm
UV Index
6
Visibility
10 km
Rain Chance
79%
Snow Chance
0%
Sun & Moon
Sunrise
06:07 AM
Sunset
06:30 PM
Moonrise
10:27 AM
Moonset
11:39 PM
Moon Phase
Waxing Crescent
Moon Illumination
27%
Patchy rain nearby
Thursday, April 23, 2026
High
29°C
Low
28°C
Rain Chance
68%
Hourly Forecast
29°C
29°C
29°C
29°C
29°C
29°C
28°C
28°C
28°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
29°C
Day Statistics
Maximum Wind
22 km/h
Humidity
74%
Precipitation
2 mm
UV Index
6
Visibility
10 km
Rain Chance
68%
Snow Chance
0%
Sun & Moon
Sunrise
06:06 AM
Sunset
06:30 PM
Moonrise
11:31 AM
Moonset
No moonset
Moon Phase
Waxing Crescent
Moon Illumination
38%
Solar Radiation Data
Shortwave Radiation
911.94
Diffuse Radiation
276.72
DNI
3161.89
GTI
981.4
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