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
| 15 September 2026 Tue 28.5 ° C ( 83.3°F )  Overcast |
Feels Like : 31.8 ° C / 89.2°F Humidity : % 71 Pressure : 1011 mb Wind Speed : 3.6 kmph / 2.2 miles from NNE 
Visibility : 10 km Precipitation (rainfall) : 0 mm Cloud (%) : 100 |
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 |
|---|---|---|---|---|---|---|---|
| 15 September 2026 Tue | Overcast |
27.4 ° C | 29.6 ° C | 28.5 ° C | % 74 | 17.3 km/h | 82% |
| 16 September 2026 Wed |  Light rain shower |
25.8 ° C | 28.8 ° C | 27.7 ° C | % 78 | 41.8 km/h | 83% |
| 17 September 2026 Thu |  Patchy rain nearby |
26 ° C | 27.9 ° C | 27 ° C | % 83 | 40 km/h | 86% |
| 18 September 2026 Fri | Light rain shower |
26.6 ° C | 28.6 ° C | 27.5 ° C | % 81 | 53.6 km/h | 88% |
| 19 September 2026 Sat | Overcast |
27.6 ° C | 29.6 ° C | 28.4 ° C | % 74 | 45 km/h | 73% |
| 20 September 2026 Sun | Patchy rain nearby |
28 ° C | 28.9 ° C | 28.5 ° C | % 70 | 24.5 km/h | 61% |
| 21 September 2026 Mon | Light rain shower |
27.5 ° C | 29.1 ° C | 28.3 ° C | % 71 | 5.8 km/h | 66% |
| 22 September 2026 Tue | Light rain shower |
27.5 ° C | 28.3 ° C | 28 ° C | % 73 | 13.7 km/h | 84% |
| 23 September 2026 Wed | Overcast |
27.1 ° C | 28.3 ° C | 28.1 ° C | % 74 | 26.3 km/h | 64% |
| 24 September 2026 Thu | Overcast |
27 ° C | 28.1 ° C | 27.5 ° C | % 76 | 29.5 km/h | 70% |
| 25 September 2026 Fri | Overcast |
27.3 ° C | 28.1 ° C | 27.6 ° C | % 75 | 24.8 km/h | 23% |
| 26 September 2026 Sat | Overcast |
27.2 ° C | 29.1 ° C | 28.1 ° C | % 75 | 32.4 km/h | 80% |
| 27 September 2026 Sun | Overcast |
27.8 ° C | 29.1 ° C | 28.3 ° C | % 75 | 30.6 km/h | 65% |
| 28 September 2026 Mon | Overcast |
27.6 ° C | 29.1 ° C | 28.3 ° C | % 74 | 31.7 km/h | 76% |
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