Hot
Average highs reach 32°C, so days can feel very hot.
September verdict
Surat Thani, Thailand in September
Weather score52Mixed
Mixed for holiday weather
Average highs reach 32°C, so days can feel very hot. Sunshine averages 5.5h per day, enough for a balanced month. Rainfall averages 240mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
32°C
Rain
240mm
Sun
5.5h
Sea
29°C
Weather score
52
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 240mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.5h per day, enough for a balanced month.
Warm sea
Sea temperatures average 29°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Surat Thani, Thailand with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September32°C average high
September is close to Surat Thani's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsMarch to May
This stretch sets the upper range for average daytime heat.
Rain
September240mm average rain
September is wetter than Surat Thani's yearly average, so flexible plans matter more.
Driest monthsJanuary to April
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.5 hours average sun
September is one of Surat Thani's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsFebruary to March
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September29°C average sea
September is close to Surat Thani's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaMarch to July
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
September52 weather score
September is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJanuary to March
These months have the strongest weather score in the monthly averages.
Hotels near Surat Thani, Thailand
Marriott
Renaissance Koh Samui Resort & SpaKoh Samui, Thailand
W Koh SamuiKoh Samui, Thailand
Sheraton Samui ResortKoh Samui, Thailand
Vana Belle, a Luxury Collection Resort, Koh SamuiKoh Samui, Thailand
The Ritz-Carlton, Koh SamuiKoh Samui, Thailand
Khao Lak Marriott Beach Resort & SpaTakua Pa District, Phang Nga, Thailand