September · Papua New Guinea
Best time to visit Rabaul in September Weather, crowds & prices
Weather in Rabaul in September
Average temperature 27°C, 117 mm of rain, about 27 days with 6+ hours of sunshine and 80% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
5.3/10
Ranked #1 of 12 months
- Avg temp
- 27°C
- Rainfall
- 117 mm
- Humidity
- 80%
- Days with 6h+ sun
- 27
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
September in Rabaul scores 5.3/10 for sightseeing and cultural travel - the single best month of the year. Expect around 27°C, 117 mm of rain, and roughly 27 days with 6+ hours of sunshine this month.
Rabaul is an East New Britain harbor town surrounded by volcanic peaks, ash-covered WWII history, hot springs, and access to exceptional diving.
September in Rabaul — the year's strongest window
Days in September average 27°C (81°F) and humidity near 80% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
117 mm of rain makes this a wet month here, though with about 27 days with 6+ hours of sunshine there is still bright weather between the fronts.
On our climate-comfort scale this is the top-ranked month of the year for Rabaul at 5.3/10 — the reference point every other month on this page is measured against.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Budget for peak pricing, and crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Rabaul in September?
- In September, Rabaul averages 27°C, 117 mm of rain, and about 27 days with 6+ hours of sunshine. Its climate-comfort score is 5.3/10.
- Is September a good time to visit Rabaul?
- September earns a 5.3/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Rabaul in September?
- Expect about 117 mm of rain in September. Average humidity is 80% and there are about 27 days with 6+ hours of sunshine.
Curated in Rabaul
Tickets & experiences
Things to do in Rabaul
Rabaul, Papua New Guinea. Live activities and tours from GetYourGuide, matched to this destination.