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
| 20 December 2025 Sat 27 ° C ( 80.5°F )  Sunny |
Feels Like : 29 ° C / 84.2°F Humidity : % 68 Pressure : 1010 mb Wind Speed : 8.3 kmph / 5.1 miles from NNE 
Visibility : 10 km Precipitation (rainfall) : 0 mm Cloud (%) : 8 |
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 |
|---|---|---|---|---|---|---|---|
| 20 December 2025 Sat | Sunny |
26.9 ° C | 27.8 ° C | 27.3 ° C | % 70 | 13 km/h | 0% |
| 21 December 2025 Sun | Sunny |
26.8 ° C | 27.7 ° C | 27.3 ° C | % 73 | 25.2 km/h | 0% |
| 22 December 2025 Mon | Sunny |
27 ° C | 27.6 ° C | 27.3 ° C | % 69 | 22.3 km/h | 0% |
| 23 December 2025 Tue | Sunny |
26.7 ° C | 27.4 ° C | 27.1 ° C | % 71 | 11.5 km/h | 0% |
| 24 December 2025 Wed |  Partly Cloudy |
26.7 ° C | 27.8 ° C | 27.1 ° C | % 71 | 9 km/h | 0% |
| 25 December 2025 Thu | Sunny |
27 ° C | 27.6 ° C | 27.3 ° C | % 72 | 12.2 km/h | 0% |
| 26 December 2025 Fri |  Patchy rain nearby |
26.9 ° C | 27.6 ° C | 27.4 ° C | % 72 | 8.3 km/h | 79% |
| 27 December 2025 Sat | Patchy rain nearby |
27 ° C | 27.7 ° C | 27.3 ° C | % 76 | 21.6 km/h | 79% |
| 28 December 2025 Sun | Patchy rain nearby |
27.1 ° C | 27.5 ° C | 27.4 ° C | % 74 | 17.3 km/h | 82% |
| 29 December 2025 Mon | Patchy rain nearby |
27 ° C | 27.4 ° C | 27.3 ° C | % 70 | 14 km/h | 86% |
| 30 December 2025 Tue | Patchy rain nearby |
26.6 ° C | 27.1 ° C | 26.9 ° C | % 75 | 14.8 km/h | 88% |
| 31 December 2025 Wed | Patchy rain nearby |
26.8 ° C | 26.9 ° C | 26.9 ° C | % 73 | 16.2 km/h | 86% |
| 01 January 2026 Thu | Patchy rain nearby |
26.6 ° C | 27.1 ° C | 26.9 ° C | % 72 | 14.8 km/h | 89% |
| 02 January 2026 Fri | Partly Cloudy |
26.8 ° C | 26.8 ° C | 26.9 ° C | % 71 | 13 km/h | 0% |
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