Koh Samui 气候 and Average 天气
气候 of Koh Samui: average temperatures, rainfall and seasons month by month.
气候 in Koh Samui month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| 月份 | Avg high | Avg low | 雨fall | Rating |
|---|---|---|---|---|
| 一月 | 26° | 22° | 58 mm | ★★★★☆ |
| 二月 | 27° | 23° | 66 mm | ★★★★☆ |
| 三月 | 28° | 24° | 34 mm | ★★★★★ |
| 四月 | 30° | 24° | 47 mm | ★★★★☆ |
| 五月 | 29° | 24° | 140 mm | ★★★★☆ |
| 六月 | 30° | 24° | 83 mm | ★★★★☆ |
| 七月 | 30° | 24° | 105 mm | ★★★★☆ |
| 八月 | 29° | 23° | 96 mm | ★★★★☆ |
| 九月 | 28° | 23° | 127 mm | ★★★★☆ |
| 十月 | 27° | 23° | 235 mm | ★★★☆☆ |
| 十一月 | 26° | 22° | 301 mm | ★★★☆☆ |
| 十二月 | 26° | 22° | 182 mm | ★★★☆☆ |
气候 type: Temperate. 来源： Open-Meteo archive (ERA5).
Recent extremes in Koh Samui
高est and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Koh Samui compares，天气为nearby places
Annual averages, and the difference against Koh Samui.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Khao Sok National Park | 176 km | 26°C | +1°C warmer | 2729 mm |
| Railay Beach | 211 km | 27°C | +2°C warmer | 2106 mm |
| Phuket International Airport | 243 km | 28°C | +2°C warmer | 2258 mm |
| 五月a Bay | 246 km | 28°C | +3°C warmer | 2017 mm |
| Phuket | 254 km | 28°C | +2°C warmer | 2028 mm |
最佳旅游时间 Koh Samui
Go in 一月, 二月, 三月 and 四月. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: 十月, 十一月 and 十二月 - expect the least comfortable mix of heat, cold or rain.
What this means for Koh Samui
Today is about average for 九月. The forecast high of 28°C is in line，天气为the 28°C typical for this month.
A 80% chance means rain is expected over most of the area. Plan indoor alternatives.
Wet roads are likely; braking distances roughly double in heavy rain.
Within 15 degrees of the equator, day length barely changes all year; seasons are defined by rain, not temperature.
Northern Hemisphere, so peak summer falls in 六月至八月.
The gap between the warmest and coldest month averages 3°C - an unusually even climate through the year.
What至pack, what至skip
- Lightweight, light-coloured clothing and a refillable water bottle
- 周日glasses, a brimmed hat and SPF 30+
- A packable rain shell - 7 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid 十月, 十一月 and 十二月 - historically the least comfortable months here.
摘要
Koh Samui is an island in 泰国. Koh Samui is an island known for palm-fringed beaches in the Gulf.
目前气温为28°C (82°F) in Koh Samui，天气为阴天. 体感温度为33°C. 今天气温在23°C至28°C. 降水概率为80%. Sightseeing conditions score 7.6/10 - 良好.
最佳旅游时间是Koh Samui is 一月, 二月, 三月 and 四月. 气候为temperate. 十月, 十一月 and 十二月 tend至be the least comfortable months. 四月 is the warmest month，天气为average highs near 30°C, while 一月 is the coldest，天气为lows near 22°C.
The closest major airport is Phuket International Airport (HKT), about 243 km away. Nearby highlights include Khao Sok National Park, Railay Beach, 五月a Bay and Langkawi.
简单来说。 Today is about average for 九月. The forecast high of 28°C is in line，天气为the 28°C typical for this month. The best window至be outside is roughly 7 AM至10 AM, when temperature, rain chance and wind line up best. fishing is the strongest bet in Koh Samui today at 9.4/10. Wet roads are likely; braking distances roughly double in heavy rain.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Koh Samui
天气 map for Koh Samui
Animated model layers. Pick a layer至load it.
Animated layers by 风y. For pin-level detail and nearby places, see the interactive map below.
Explore Koh Samui
Every topic we hold for this place, and the same topic for the places around it.
气候 for related places
Frequently asked questions
Where is Koh Samui?
Koh Samui is an island in 泰国. Its coordinates are 9.512, 100.0136. It lies in 亚洲.
What is the weather like in Koh Samui现在?
It is currently 28°C (82°F)，天气为阴天. 湿度 is 74% and wind is 4 km/h.
When is the best time至visit Koh Samui?
一月, 二月, 三月 and 四月 offer the most comfortable conditions in Koh Samui, which has a temperate climate. 十月, 十一月 and 十二月 are usually the hardest months for outdoor plans.
What time zone is Koh Samui in?
Koh Samui observes Asia/Bangkok (UTC+07:00). The local time is 2:42 PM.
What is the nearest airport至Koh Samui?
The closest airports are Phuket International Airport (HKT), 243 km away and Suvarnabhumi Airport (BKK), 471 km away.
What are the top things至do in Koh Samui?
Popular options include Khao Sok National Park, Railay Beach, 五月a Bay and Langkawi.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (islands) - coordinates, hierarchy and facts. |
|---|---|
| 预报 and observations | Open-Meteo (ECMWF and national models). |
| 空气质量 and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| 气候 averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated 九月 15, 2026 at 2:42 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
