The weather in Surat Thani in September is very hot. The average temperatures are between 24°C and 31°C, drinking water regularly is advisable.
There’s going to be many days of rain during the month of September in Surat Thani.
Surat Thani should expect an average of 15 to 22 days of rain, so be sure to bring along a waterproof jacket to stay dry this month!
Our weather forecast can give you a great sense of what weather to expect in Surat Thani in September 2025.
If you’re planning to visit Surat Thani in the near future, we highly recommend that you review the 14 day weather forecast for Surat Thani before you arrive.