14-day forecast — Koh Samui
Updated every hour
Sun · Today · 13 Sep
Showers
+28°
+26°
11,1 mm
Mon · Tomorrow · 14 Sep
Showers
+30°
+27°
9,4 mm
Tuesday · 15 Sep
Showers
+30°
+28°
5,4 mm
Wednesday · 16 Sep
Showers
+30°
+28°
11,7 mm
Thursday · 17 Sep
Showers
+29°
+28°
2,7 mm
Friday · 18 Sep
Showers
+28°
+26°
34,2 mm
Saturday · 19 Sep
Showers
+28°
+26°
21,1 mm
Sunday · 20 Sep
Showers
+29°
+26°
7,9 mm
Monday · 21 Sep
Cloudy
+29°
+28°
1,5 mm
Tuesday · 22 Sep
Cloudy
+29°
+28°
2,2 mm
Wednesday · 23 Sep
Showers
+29°
+26°
12,7 mm
Thursday · 24 Sep
Showers
+27°
+26°
24,8 mm
Friday · 25 Sep
Showers
+27°
+26°
3,3 mm
Saturday · 26 Sep
Showers
+28°
+26°
8,7 mm
About Koh Samui
Île tropicale du golfe de Thaïlande, plages et chaleur moite.
CountryThailand
RegionGolfe de Thaïlande
ContinentAsia
Time zoneAsia/Bangkok (+07:00)
Latitude9.5120°
Longitude100.0136°
Air qualityFair (EAQI 39)
Climate in Koh Samui in August
Normals 8 years · best time to visit · Open-MeteoBest time to visit Koh Samui: January–December. With good weather, August is a recommended month to visit.
| July | August | September | |
|---|---|---|---|
| Average temperature | → 26°C | 26°C | ▼ 25°C |
| Highest temperature | → 29°C | 29°C | ▼ 27°C |
| Lowest temperature | ▼ 24°C | 23°C | → 23°C |
| Sea temperature | ▲ 30,7°C | 30,9°C | ▼ 30,1°C |
| Precipitation | ▼ 96 mm | 92 mm | ▲ 131 mm |
| Days with precipitation | ▲ 18 d | 19 d | ▲ 21 d |
| Humidity | ▲ 77% | 79% | ▼ 78% |
| Sunshine hours per day | ▲ 9,1 h | 9,4 h | ▼ 8,9 h |
| Cloud cover | ▼ 28% | 24% | ▲ 27% |
| UV index (midday) | → 12 | 12 | → 12 |
| Day length | 12:37 | 12:26 | 12:11 |
| Our rating | Good | Good | Good |
Temperature day by day in August mean + moving average
Precipitation day by day in August mm
UV index day by day in August midday value, clear-sky
Climate normals calculated from Open-Meteo (ERA5 archive 8 years, sea temperature Marine API). UV estimated from solar elevation.
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Data source
Global weather models — international forecasts
Météo de Koh Samui (Thailand) : conditions actuelles et prévisions à 24 h et 14 jours pour préparer votre voyage. Sur place actuellement, il fait +28°, showers, vent 21 km/h. Sur les 7 prochains jours, les températures varient de 26 à 30 °C et 96 mm de pluie. Heure locale (fuseau Asia/Bangkok). Données Open-Meteo et WeatherAPI.