SeasonMapAdamstown (Pitcairn) weather in September
Pitcairn Islands
September in Adamstown: nice, rainy, with clean air — an excellent time to visit.
#7 of 12 months in Adamstown · #633 of 1383 destinations to visit in September · comfort 82/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Adamstown in September
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Adamstown climate normals — September
| Daytime high | 21°C / 70°F | 😎 nice |
|---|---|---|
| Nighttime low | 20°C / 68°F | |
| Sea temperature | 22°C / 72°F | 🙂 pleasant |
| Rainfall | 94 mm / 3.7 in | 🌧 rainy |
| Rainy days | 11 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 16°C / 60°F | |
| Sunshine | 9.6 h/day | |
| Daylight | 12 h | |
| Wind | 30 km/h / 18 mph | |
| Air quality (US AQI) | 45 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Adamstown in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 3 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Adamstown's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherAdamstown's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in Adamstown in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Rule
Landing depends on the swell
1 Jan – 31 DecClosuresEverything and everyone comes ashore by longboat through the surf at Bounty Bay. When the swell is up the captain calls it off, and a scheduled visit becomes a slow lap of the island from the rail. Source ↗
- Rule
Quarterly ship from Mangareva
1 Jan – 31 DecBook earlyThe MV Silver Supporter is the only scheduled way in, running in quarterly blocks from Mangareva in French Polynesia and timed to the weekly Air Tahiti flight. Twelve berths, so dates are taken a long way ahead. Source ↗
Where is Adamstown?
Adamstown in September — FAQ
- Is September a good time to visit Adamstown?
- September in Adamstown: nice, rainy, with clean air — an excellent time to visit. It ranks #7 of 12 months for Adamstown on SeasonMap's comfort score (82/100).
- What is the weather like in Adamstown in September?
- In September, Adamstown averages a daily high of 21.2°C and a low of 20°C, with about 93.7 mm of rain over roughly 10.6 rainy days.
- What is the air quality in Adamstown in September?
- Adamstown has a mean US Air Quality Index of about 45 in September.