Thailand
Phuket in September: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Phuket in September is climatically well suited to beach holidays. The average daily high is around 28 °C, and the sea is about 29 °C. With about 28 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
57/100 · #6
Warmth
#11
Dryness
#10
Sun
#10
Sea warmth
#7
Published best categories: none
Phuket · SeptemberPhoto: PavF · CC BY-SA 3.0Climate facts
- Average high
- 28 °C
- Average low
- 27 °C
- Sea
- 29 °C
- Rainy days (est.)
- 28 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 85 %
For your trip planning
September: the wettest month, as warm as August and October
In Phuket, September differs from its neighbours mainly in rain: at 352 mm it is the wettest month of the year in our data, ahead of October (333 mm) and August (324 mm). Average highs and lows stay at 28 °C and 27 °C throughout, and the sea holds at 29 °C. Build flexible days into your plans for wet weather.
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| August | 28 | 27 | 26 | 324 | 5.8 | 84 | 3.6 | 29 | 56 |
| September (selected) | 28 | 27 | 28 | 352 | 5.6 | 85 | 3.3 | 29 | 57 |
| October | 28 | 27 | 29 | 333 | 5.6 | 85 | 2.7 | 29 | 58 |
How do the previous and next months compare?
Baseline: September (57/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| August | -1 | +0.3 °C | +0.4 °C | -1.1 | -27.9 mm | +0.2 h | -1 % | +0.3 m/s | +0.4 °C |
| October | +1 | -0.1 °C | -0.2 °C | +1.7 | -19.5 mm | ±0 h | +0.4 % | -0.6 m/s | -0.2 °C |
All twelve months in context
Find a place to stay
Where to stay in Phuket
Compare available stays, prices and cancellation terms for Phuket on Booking.com.
Booking.comFind places to stayAffiliate link: there is no extra cost to you.
Useful next decisions
Frequently asked questions
How warm is Phuket in September?
The average daily high is around 28 °C, with an average daily low of about 27 °C.
Can you swim in Phuket in September?
The sea is about 29 °C (very warm).
Does it rain a lot in Phuket in September?
The curated estimate is about 28 rainy days per month, not a directly measured long-term average. Total precipitation averages around 352 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Phuket?
By the climate score, January, February, March and December are the strongest months for Phuket. For a beach trip: January, February, March and December. September is not among them.