SeasonMapFernando de Noronha (Noronha) weather in September
Brazil
September in Fernando de Noronha: hot, dry, with muggy air — an excellent time to visit.
#3 of 12 months in Fernando de Noronha · #311 of 1383 destinations to visit in September · comfort 88/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Fernando de Noronha in September
Other months in Fernando de Noronha
Fernando de Noronha's forum calls November good, though not the very best of the year — that stretch runs roughly August through October, before the December-through-March rainy season sets in. Regulars note temperatures stay warm, 25-30°C, essentially year-round regardless of rain, and flag that the island's whole draw is nature, so a rainy day here means genuinely limited alternative activities.
Add your own note from Fernando de Noronha's card on the map.
Fernando de Noronha climate normals — September
| Daytime high | 30°C / 86°F | 🥵 hot |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 32°C / 90°F | |
| Sea temperature | 27°C / 81°F | 😎 warm sea |
| Rainfall | 23 mm / 0.9 in | ☀️ dry |
| Rainy days | 11 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 22°C / 72°F | |
| Sunshine | 11.4 h/day | |
| Daylight | 12.1 h | |
| Wind | 33 km/h / 20 mph | |
| Air quality (US AQI) | 53 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Fernando de Noronha 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.
Busyschool holidays in 2 of the markets that fill it, one of its best months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Fernando de Noronha'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).
Best weatherFernando de Noronha's weather peaks September–November.
Best weatherFair weatherToughest weather
What's on in Fernando de Noronha in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Rule
Island tax and park ticket
1 Jan – 31 DecBook earlyEveryone pays a daily environmental tax that climbs the longer you stay, and the best beaches sit inside the marine park and need a separate ticket valid ten days. Buy both before you fly. Source ↗
- Season
Calm sea and clear water
1 Aug – 30 Nov · usuallyDry seasonThe swell drops out of the north coast from August and underwater visibility is at its best into November, which is also when the island is emptiest between the Brazilian holiday blocks.
Where is Fernando de Noronha?
Fernando de Noronha in September — FAQ
- Is September a good time to visit Fernando de Noronha?
- September in Fernando de Noronha: hot, dry, with muggy air — an excellent time to visit. It ranks #3 of 12 months for Fernando de Noronha on SeasonMap's comfort score (88/100).
- What is the weather like in Fernando de Noronha in September?
- In September, Fernando de Noronha averages a daily high of 29.9°C and a low of 24.9°C, with about 22.8 mm of rain over roughly 10.7 rainy days.
- What is the air quality in Fernando de Noronha in September?
- Fernando de Noronha has a mean US Air Quality Index of about 53 in September.