are sometimes incorrectly informed about Koh Samui weather seasons
prior to their departure. Not everyone is aware for example, that
we do not have the same rainy season as Phuket does.
This is because Koh Samui island is situated on the Gulf coast and
faces east, so it feels the effect of the Northeast monsoon.
January - February
is the cool season on Samui island, temperatures
average a pleasant 79°F / 26°C. This is generally the best
time to visit as it is not too hot.
March - May is the hot season, the temperature
starts warming up, it has been known to reach 40°C There is
generally less rain on Koh Samui during these months.
June - September generally speaking, between
these months, most days will be filled with sun, except for the
occasional downpour, which usually doesn't last long.
October - December frequent showers
(not monsoons) come in October, and last until sometime around mid
December, when the Samui weather generally clears up with extended
periods of dry and often sunny weather. Water sports enthusiasts
should note that the sea can get rough at this time, and visibility
can be affected.
Another typical day on the tropical island
The above information acts as a general guide
of the normal Koh Samui weather patterns but there are always exceptions
to the rule - storms in the dry season or weeks of dry weather in
the wet season.
See below for more information and the latest weather forecast
for Koh Samui: