September · Indonesia
Best time to visit Raja Ampat in September Weather, crowds & prices
Weather in Raja Ampat in September
Average temperature 28°C, 164 mm of rain, about 23 days with 6+ hours of sunshine and 81% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
7.5/10
Ranked #2 of 12 months
- Avg temp
- 28°C
- Rainfall
- 164 mm
- Humidity
- 81%
- Days with 6h+ sun
- 23
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Raja Ampat scores 7.5/10 for beach and coastal travel - one of the top 12-month picks (#2). Expect around 28°C, 164 mm of rain, and roughly 23 days with 6+ hours of sunshine this month.
Raja Ampat's reefs hold the world's richest marine biodiversity, scattered across jungle islands in West Papua.
September in Raja Ampat — reliably good (2nd best month)
September averages 28°C (82°F) and humidity near 81%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Monthly rainfall reaches 164 mm — wet for this destination — but about 23 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 7.5/10 here, 2nd of 12 months, against 8/10 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.
Figure on mid-season pricing, with crowds are moderate.
Frequently asked
- What is the weather like in Raja Ampat in September?
- In September, Raja Ampat averages 28°C, 164 mm of rain, and about 23 days with 6+ hours of sunshine. Its climate-comfort score is 7.5/10.
- Is September a good time to visit Raja Ampat?
- September earns a 7.5/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Raja Ampat in September?
- Expect about 164 mm of rain in September. Average humidity is 81% and there are about 23 days with 6+ hours of sunshine.
Curated in Raja Ampat
Tickets & experiences
Things to do in Raja Ampat
Raja Ampat, Indonesia. Live activities and tours from GetYourGuide, matched to this destination.