Koh Samui
Angelika Bentin / age fotostock
Koh Samui (Thailand) From 04/09/2022 to 10/09/2022
All overall Average 58%14%14%94%86%62%
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Weather Forecast Koh Samui: Weather forecast in September

Situated on the west coast of the GUlf of Thailand, the island of Koh Samui enjoys a warm climate all year round and is relaitively humid. In the month of September average temperatures stabilise at around 23C at night and 32c during the day. The number of hours of sunshine is only 5 per day but with a water temperature at 28C the conditions for bathing are excellent. Once the sun goes down the downpours arrive in Koh Samui and there are around 19 days of rain during the month of Septmeber bringing 117mm of precipitation which contributes to a weather comfort index score of 48/100.

The weather prediction service inKoh Samui is based on a calculation which takes into account historic data from the last 10 years, as well as predictions based on certain criteria such as air temperature, humidity, water temperature, wind speed and sunshine.

Prepare your things now for your stay by taking a look at the weather predictions forKoh Samui.

  • Temperature
  • Bad weather
  • Sunbathing
  • Swimming
  • Wind
  • Humidity

The weather is rated on a scale from 0 to 100, with the worst weather conditions ranging between 0 and 19 and the best ranging above 79.
The overall weather comfort index is:

  • Excellent (Rating between 80% and 100%)
  • Good (Rating between 60% and 79%)
  • Average (Rating between 40% and 59%)
  • Bad (Rating between 20% and 39%)
  • Very bad (Rating between 0% and 19%)

Practical advice for a stay inKoh Samui:

  • An umbrella for the afternoons
  • A waterproof jacket for the evenin
  • Swimming costumes and snorkelling gear

Weather forecast Koh Samui in september

  • From 04/09/2022 to 10/09/2022 48% Average 58%14%14%94%86%62%
  • From 11/09/2022 to 17/09/2022 47% Average 58%12%16%92%84%60%
  • From 18/09/2022 to 24/09/2022 48% Average 62%6%16%92%84%60%
  • From 25/09/2022 to 01/10/2022 49% Average 64%6%18%92%82%58%
  • From 02/10/2022 to 08/10/2022 48% Average 66%2%18%90%82%58%
< August October >

Thailand: Seven-day weather forecast

Take a look at the seven-day weather forecast for the principal cities inThailand. For each destination, Easyvoyage's weather tool gives you temperature and rainfall indicators, along with wind force and direction and sunrise/sunset times. Prepare your holidays using our weather forecasts or organise your activities thanks to the weather comfort index forThailand. Whether you're getting ready to go or already on holiday, it's never been simpler to keep an eye on the weather than with Easyvoyage!

Koh Samui : Monthly weather forecasts

  • January 69%
  • February 68%
  • March 61%
  • April 50%
  • May 46%
  • June 48%
  • July 49%
  • August 48%
  • September 48%
  • October 51%
  • November 58%
  • December 64%