Surat Thani · Thailand
Ko Samui in August
In August, Ko Samui averages a daytime high of 33 °C and a night-time low of 24 °C, with about 134 mm of rain over the month. Ko Samui has no month that is both mild and dry by the measure used here.
- Average high
- 33 °C
- Average low
- 24 °C
- Rain in the month
- 134 mm
- Daylight on 15 Aug
- 12 h 30 min
- Comfortable month
- No
- Places to stay
- 244
When to go
How August compares with the rest of the year in Ko Samui
August is tied for the 3rd warmest month in Ko Samui by average daytime high; across the year the highs run from 30 °C to 34 °C and the lows from 23 °C to 25 °C. By day, August is about the same as July, and September is about the same as August.
August brings 134 mm of rain, less than the monthly average of 162 mm (1941 mm a year); it is the 7th wettest month.
On 15 August the sun is up for about 12 h 30 min, against 11 h 30 min at the shortest and 12 h 40 min at the longest point of the year (calculated from the latitude, sunrise to sunset).
| Month | High | Low | Rain | Comfortable |
|---|---|---|---|---|
| January | 30 °C | 23 °C | 136 mm | |
| February | 31 °C | 23 °C | 29 mm | |
| March | 33 °C | 23 °C | 54 mm | |
| April | 34 °C | 25 °C | 93 mm | |
| May | 34 °C | 25 °C | 157 mm | |
| June | 33 °C | 25 °C | 116 mm | |
| July | 33 °C | 24 °C | 133 mm | |
| August | 33 °C | 24 °C | 134 mm | |
| September | 32 °C | 24 °C | 157 mm | |
| October | 31 °C | 24 °C | 259 mm | |
| November | 30 °C | 24 °C | 418 mm | |
| December | 30 °C | 23 °C | 255 mm |
Comfortable means average daytime high between 18 °C and 29 °C and under 80 mm of rain in the month. Averages for 1991–2020 over the surrounding area, a grid square about 50 km across, so a coast or a nearby mountain can make the town itself warmer or cooler. Data: CRU TS v4.10, Climatic Research Unit, University of East Anglia (Open Database License).
When to go
Is August a good time to visit Ko Samui?
Not by the measure used here: the average high of 33 °C is above 29 °C and about 134 mm of rain is 80 mm or more. No month in Ko Samui meets it.
The measure is about weather for a city stay only; it says nothing about events, school holidays or prices.
Public holidays in Thailand in August
Nationwide public holidays; shops and offices may close on these dates.
Where to stay
Where to stay in Ko Samui
This guide lists 244 places to stay in Ko Samui, hotels recorded in Wikidata. By straight-line distance from the centre: under 1 km, 1; 1–3 km, 8; 3–10 km, 34; 10 km or more, 201.
Sources: climate from CRU TS v4.10 (Climatic Research Unit, University of East Anglia; Open Database License), 1991–2020 averages; day length calculated from the latitude; public holidays from python-holidays (MIT); places to stay from each operator's own public pages and Wikidata. How this guide is made.