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Koh Samui

Koh Samui Weather September

To help you choose the best time to travel, you can find climate data below on the weather on Koh Samui in September.

day temperatureaverage daily high+31.7°C
night temperatureaverage daily low+24.8°C
sea temperaturesea temperature+28°C
day lengthdaytime12.5 h
sunny hours per daysunny / overcast hours4.8 / 7.7
average monthly precipitationaverage monthly precipitation122 mm

High season with the best weather conditions for the beach leisure on Koh Samui are typically January, February.

Best places in September


Temperature on Koh Samui

In September the average daily maximum on Koh Samui is +31.7°C, and the minimum +24.8°C.

The hottest September day on record is +35.4°C, and the coldest +19.4°C.

Most booked hotels on Koh Samui

Search flights to Koh Samui

Best beach resorts in September:

Barcelona
Spain

Nice
France

Rimini
Italy

Cannes
France

Lisbon
Portugal

Marseille
France


Algarve
Portugal

Marbella
Spain

Naples
Italy

Split
Croatia

Jeju
South Korea

Dubrovnik
Croatia


Daylight hours

There are 12.5 hours of daylight on Koh Samui in September. Out of these, on average 4.8 are sunny, which means it is mostly cloudy.

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Sea temperature

The average monthly temperature in the Gulf of Thailand on the beaches of Koh Samui in September is +28°C.

The water is not only warm enough to bathe in, but it is also possible to stay in the water for an extended amount of time.

Koh Samui climate by month


Precipitation

The amount of precipitation on Koh Samui in September is usually 122 mm, which may ruin part of the trip.

Beach resorts in Thailand