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Weather Forecast for Koh Samui

Surat Thani, Thailand

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Overcast

Current Weather - Koh Samui: 29°C

Surat Thani, Thailand

Overcast

Feels like 33°C

Wind

39 km/h WSW

Humidity

74%

Pressure

1011 mb

UV Index

4

Visibility

10 km
Overcast

Overcast

Thursday, August 20, 2026

High

31°C

Low

28°C

Rain Chance

48%

Hourly Forecast

Overcast 28°C
05:00
Overcast 28°C
06:00
Overcast 28°C
07:00
Overcast 28°C
08:00
Overcast 28°C
09:00
Overcast 29°C
10:00
Overcast 29°C
11:00
Overcast 29°C
12:00
Overcast 30°C
13:00
Patchy rain nearby 30°C
14:00
Patchy rain nearby 31°C
15:00
Overcast 31°C
16:00
Overcast 30°C
17:00
Light rain shower 30°C
18:00
Patchy rain nearby 30°C
19:00
Overcast 29°C
20:00
Patchy rain nearby 29°C
21:00
Overcast 29°C
22:00
Patchy rain nearby 29°C
23:00
Aug 21

Day Statistics

Maximum Wind

44 km/h

Humidity

71%

Precipitation

1 mm

UV Index

10

Visibility

10 km

Rain Chance

48%

Snow Chance

0%

Sun & Moon

Sunrise

06:11 AM

Sunset

06:35 PM

Moonrise

12:39 PM

Moonset

Does not set today

Moon Phase

First Quarter

Moon Illumination

58%

Air Quality

PM2.5

6.7

μg/m³

PM10

10.4

μg/m³

NO₂

1

μg/m³

O₃

51.6

μg/m³

SO₂

0.6

μg/m³

CO

109.7

μg/m³

US EPA Index: 1 GB DEFRA Index: 1

Solar Radiation Data

Shortwave Radiation

277

Diffuse Radiation

155.63

DNI

5.25

GTI

275.5