Koh Samui Airport (USM) 15 Day Weather Forecast, Koh Samui Thailand
Current weather conditions and 15 day weather forecast for Koh Samui Airport in Koh Samui, Thailand including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain, wind speed, cloud, pressure, and UV index.
Current weather conditions at USM
| 13 December 2025 Sat 26.1 ° C ( 79°F )  Patchy rain nearby |
Feels Like : 28.8 ° C / 83.8°F Humidity : % 81 Pressure : 1010 mb Wind Speed : 6.1 kmph / 3.8 miles from ESE 
Visibility : 9 km Precipitation (rainfall) : 0.4 mm Cloud (%) : 80 |
15-day weather forecast for Koh Samui Airport, Koh Samui, Thailand
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 14 December 2025 Sun |  Moderate rain |
26 ° C | 27.5 ° C | 26.7 ° C | % 78 | 27 km/h | 88% |
| 15 December 2025 Mon | Patchy rain nearby |
26.4 ° C | 27.4 ° C | 26.9 ° C | % 78 | 34.2 km/h | 86% |
| 16 December 2025 Tue | Patchy rain nearby |
26.5 ° C | 27.1 ° C | 26.8 ° C | % 78 | 20.5 km/h | 89% |
| 17 December 2025 Wed | Moderate rain |
26.4 ° C | 27.7 ° C | 27.1 ° C | % 73 | 13 km/h | 89% |
| 18 December 2025 Thu | Patchy rain nearby |
26.7 ° C | 27.3 ° C | 27.1 ° C | % 73 | 10.1 km/h | 83% |
| 19 December 2025 Fri | Patchy rain nearby |
26.3 ° C | 27 ° C | 26.7 ° C | % 73 | 9.4 km/h | 86% |
| 20 December 2025 Sat | Patchy rain nearby |
26.3 ° C | 27 ° C | 26.7 ° C | % 74 | 7.9 km/h | 85% |
| 21 December 2025 Sun |  Partly Cloudy |
26.5 ° C | 27.3 ° C | 26.9 ° C | % 74 | 17.6 km/h | 0% |
| 22 December 2025 Mon |  Sunny |
26.5 ° C | 27.1 ° C | 26.8 ° C | % 71 | 14.8 km/h | 0% |
| 23 December 2025 Tue | Patchy rain nearby |
26.7 ° C | 27 ° C | 26.8 ° C | % 72 | 25.2 km/h | 74% |
| 24 December 2025 Wed | Sunny |
26.4 ° C | 26.8 ° C | 26.6 ° C | % 68 | 20.2 km/h | 0% |
| 25 December 2025 Thu | Partly Cloudy |
26.5 ° C | 26.6 ° C | 26.6 ° C | % 68 | 18.7 km/h | 0% |
| 26 December 2025 Fri | Partly Cloudy |
26.4 ° C | 26.8 ° C | 26.7 ° C | % 72 | 18 km/h | 0% |
| 27 December 2025 Sat | Partly Cloudy |
26.7 ° C | 26.9 ° C | 26.8 ° C | % 74 | 16.9 km/h | 0% |
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