Ko Samui weather in October
October in Ko Samui: hot, soaked, with clean air — a good time to visit.
#11 of 12 months in Ko Samui · #455 of 604 destinations to visit in October · comfort 66/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Ko Samui climate normals — October
| Daytime high | 28°C / 83°F | 🥵 hot |
|---|---|---|
| Nighttime low | 26°C / 79°F | |
| Feels like (high) | 33°C / 91°F | |
| Rainfall | 270 mm / 10.6 in | ⛈ soaked |
| Rainy days | 28 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 8.2 h/day | |
| Daylight | 11.9 h | |
| Wind | 20 km/h / 12 mph | |
| Air quality (US AQI) | 33 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Ko Samui?
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Ko Samui in October — FAQ
- Is October a good time to visit Ko Samui?
- October in Ko Samui: hot, soaked, with clean air — a good time to visit. It ranks #11 of 12 months for Ko Samui on SeasonMap's comfort score (66/100).
- What is the weather like in Ko Samui in October?
- In October, Ko Samui averages a daily high of 28.4°C and a low of 26°C, with about 269.8 mm of rain over roughly 27.8 rainy days.
- What is the air quality in Ko Samui in October?
- Ko Samui has a mean US Air Quality Index of about 33 in October.