Weather in Phuket in September 2025
- September is usually the coldest month of the year in Phuket;
Average weather
Average temperature in Phuket in September
Going from a maximum of +29°C during the day to a minimum of +26°C during the night, the temperature in September averages around +28°C.
The average maximum temperature goes up 33% by the end of the month, compared with the beginning of the month, from +28°C to +29°C.
Is Phuket warm or cold in September?
Phuket is typically warm in September.
Maximum temperatures go down compared to the previous month from +29°C to +28°C. The minimum temperature also goes up from +26°C to +26°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
September is the coldest month in Phuket, here is the comparison with other months:
Water temperature in Phuket in September
Water in Phuket in September is Very warm. It varies from +28°C to +30°C, with an average of +29°C. Note that the air temperature is lower than the water temperature, averaging around +28°C.
In September, water temperatures are average relative to the rest of the year:
Can you swim in Phuket in September?
Climate in Phuket in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +29°C | +28°C | +28°C | ||||
| Min. temperature | ||||||
| +23°C | +23°C | +23°C | ||||
| Max. temperature | ||||||
| +35°C | +35°C | +36°C | ||||
| Rainfall | ||||||
| 197 mm | 257 mm | 269 mm | ||||
| Wind | ||||||
| 4 m/s | 3 m/s | 2 m/s | ||||
| Avg. water temperature | ||||||
| +29°C | +29°C | +29°C | ||||
| Humidity | ||||||
| 81% | 82% | 83% | ||||
| Air pressure | ||||||
| 1008 HPa | 1009 HPa | 1009 HPa | ||||
| Sunny days | ||||||
| 0 | 0 | 0 | ||||
| Cloudy days | ||||||
| 5 | 2 | 1 | ||||
| Rainy days | ||||||
| 25 | 26 | 25 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. It’s getting colder in September. From +29°C in the day, the average maximum temperature lowers to +28°C. Prepare for more rain. Average rainfall goes from 197 mm to 257 mm. Humidity rises from 81% to 82%. Winds are calmer in comparison to August, going down from 4 m/s to 3 m/s on average. The amount of sunny days stay about the same, averaging 0 sunny days during the month.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Phuket is gradually decreasing during September, going from 8 m/s to 2 m/s over the course of the month.
Rain
How was the weather last September in Phuket?
Climate Change over Years
The climate in Phuket in September has not changed much over the last 43 years.
The average temperature was the lowest in 1994 (+28°C) and the highest in 2019 (+33°C). The driest year was 1981 with only 1340 mm of rainfall, and the wettest year was 2017 with 2500 mm.
FAQ
Is September a good time to visit Phuket?
Can you sunbathe in Phuket in September?
Can you swim in Phuket in September?
Is Phuket rainy in September?
Is it sunny in Phuket in September?
Other cities in Thailand
Monthly weather in Phuket
Source of the data
For this page, we’ve looked at the typical weather in Phuket, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.