Thailand
Ko Phi Phi in September: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Ko Phi Phi 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 27 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
56/100 · #7
Warmth
#9
Dryness
#10
Sun
#9
Sea warmth
#7
Published best categories: none
Ko Phi Phi · SeptemberPhoto: Nnthurber · CC BY-SA 4.0Climate facts
- Average high
- 28 °C
- Average low
- 28 °C
- Sea
- 29 °C
- Rainy days (est.)
- 27 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 81 %
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 | 29 | 28 | 26 | 287 | 6.3 | 80 | 4.4 | 30 | 55 |
| September (selected) | 28 | 28 | 27 | 311 | 6.1 | 81 | 4.1 | 29 | 56 |
| October | 28 | 27 | 29 | 309 | 6.0 | 82 | 3.5 | 29 | 57 |
How do the previous and next months compare?
Baseline: September (56/100)
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 | +0.4 °C | +0.4 °C | -0.8 | -23.5 mm | +0.2 h | -1.1 % | +0.3 m/s | +0.4 °C |
| October | +1 | -0.2 °C | -0.3 °C | +2.3 | -1.3 mm | -0.1 h | +0.9 % | -0.7 m/s | -0.2 °C |
All twelve months in context
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Where to stay in Ko Phi Phi
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Useful next decisions
Frequently asked questions
How warm is Ko Phi Phi in September?
The average daily high is around 28 °C, with an average daily low of about 28 °C.
Can you swim in Ko Phi Phi in September?
The sea is about 29 °C (very warm).
Does it rain a lot in Ko Phi Phi in September?
The curated estimate is about 27 rainy days per month, not a directly measured long-term average. Total precipitation averages around 311 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Ko Phi Phi?
By the climate score, January, February, March and December are the strongest months for Ko Phi Phi. For a beach trip: January, February, March and December. September is not among them.