Phuket edges it in September. Bangkok averages 25–33°C with very low crowds; Phuket 25–32°C with very low crowds.
By Daan · Last reviewed October 2026
Bangkok and Phuket
The verdict for September
Wettest, cheapest, quietest
+One of the quietest and best-value periods of the year.
–The wettest part of the year, with frequent heavy rain and potential flooding.
Maximum value if you can tolerate the rain.
Cheapest month, wettest weather
+Lowest demand and some of the best rates; Vegetarian Festival may add cultural interest depending on the year.
–One of the wettest and most weather-dependent months.
Lowest demand and some of the best rates; Vegetarian Festival may add cultural interest depending on the year.
Scores and crowd levels are my own judgement; temperatures are monthly averages. Higher scores are better: quieter, cheaper and more pleasant.
Another month