September · Thailand
Best time to visit Koh Phi Phi in September Weather, crowds & prices
Weather in Koh Phi Phi in September
Average temperature 29°C, 357 mm of rain, about 17 days with 6+ hours of sunshine and 79% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
6.1/10
Ranked #11 of 12 months
- Avg temp
- 29°C
- Rainfall
- 357 mm
- Humidity
- 79%
- Days with 6h+ sun
- 17
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Koh Phi Phi scores 6.1/10 for beach and coastal travel - ranked #11 of 12. Expect around 29°C, 357 mm of rain, and roughly 17 days with 6+ hours of sunshine this month.
Koh Phi Phi pairs limestone cliffs and turquoise bays with the busy village of Tonsai.
September in Koh Phi Phi — workable with trade-offs
September averages 29°C (83°F) and humidity near 79%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
357 mm of rain puts this in monsoon territory — about 17 days with 6+ hours of sunshine across the whole month, and multi-day washouts are normal.
It scores 6.1/10 here, 11th of 12 months, against 8.7/10 in the destination's best month.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Plan for low-season pricing, with crowds are light for this destination.
Flexible dates? February scores 2.6 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Koh Phi Phi in September?
- In September, Koh Phi Phi averages 29°C, 357 mm of rain, and about 17 days with 6+ hours of sunshine. Its climate-comfort score is 6.1/10.
- Is September a good time to visit Koh Phi Phi?
- September earns a 6.1/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Koh Phi Phi in September?
- Expect about 357 mm of rain in September. Average humidity is 79% and there are about 17 days with 6+ hours of sunshine.
Curated in Koh Phi Phi
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Koh Phi Phi, Thailand. Live activities and tours from GetYourGuide, matched to this destination.