
Koh Samet Monthly Climate Averages
Location of the Koh Samet is tropical climate zone with dry winter and rainy summer, typically with noticeable change of rainfall between seasons and insignificant temperature variance.
To help you choose the best time to travel, you can find climate data below on the weather on Koh Samet .
Month | ![]() day |
![]() night |
![]() rain |
![]() |
January | +31.9 | +21.5 | 21 | 11.9h |
February | +32.5 | +24.5 | 37 | 12.1h |
March | +33.2 | +26.2 | 70 | 12.4h |
April | +34.3 | +27.1 | 82 | 12.8h |
May | +33.6 | +26.9 | 199 | 13.1h |
June | +32.7 | +26.8 | 165 | 13.2h |
July | +32.3 | +26.5 | 172 | 13.2h |
August | +32 | +26.4 | 132 | 12.9h |
September | +31.9 | +25.4 | 255 | 12.5h |
October | +32.3 | +24.5 | 194 | 12.2h |
November | +32.6 | +23.3 | 51 | 11.9h |
December | +32 | +21.3 | 6 | 11.8h |
High season with the best weather conditions for the beach leisure on Koh Samet are typically January, February, November, December.
Temperature on Koh Samet
The table shows that the hottest months on Koh Samet are April and May, during which the average daytime temperature reaches +34.3°C and the nighttime temperature falls to +27.1°C.
The coldest months are January and September, when the daily average temperature falls to +31.9°C, and drops to +21.5°C during the night.
Most booked hotels on Koh Samet
Best beach resorts :

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Sea temperature
The month with the highest average monthly temperature in the Gulf of Thailand on the beaches of Koh Samet is April with 28 degrees.
The coldest water can be found in January — 26degrees C.
Precipitation
The largest amount of precipitation falls on average in September and May, up to 255mm, and the least in December and January — up to 6mm.