SeasonMapBoa Vista weather in September
Cabo Verde
September in Boa Vista: sweltering, a little rain, with muggy air — fine if you can take sticky heat.
#12 of 12 months in Boa Vista · #246 of 1383 destinations to visit in September · comfort 89/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Boa Vista in September
No notes yet. Open Boa Vista on the map to add the first one.
Boa Vista climate normals — September
| Daytime high | 31°C / 87°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 26°C / 78°F | |
| Feels like (high) | 34°C / 93°F | |
| Sea temperature | 28°C / 82°F | 😎 warm sea |
| Rainfall | 44 mm / 1.7 in | 🌦 some rain |
| Rainy days | 7 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 23°C / 74°F | |
| Sunshine | 10.6 h/day | |
| Daylight | 12.2 h | |
| Wind | 24 km/h / 15 mph | |
| Air quality (US AQI) | 56 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Boa Vista 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.
Quietschool holidays in 2 of the markets that fill it, one of its worst months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Boa Vista'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 weatherBoa Vista's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in Boa Vista in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Loggerhead nesting
15 Jun – 15 Oct · usuallyTurtle nestingBoa Vista's long east-coast beaches take one of the largest loggerhead nesting populations in the world, and the females come ashore after dark through the summer. Visits go out with licensed guides; torches on the sand are what ruins it. Source ↗
Where is Boa Vista?
Boa Vista in September — FAQ
- Is September a good time to visit Boa Vista?
- September in Boa Vista: sweltering, a little rain, with muggy air — fine if you can take sticky heat. It ranks #12 of 12 months for Boa Vista on SeasonMap's comfort score (89/100).
- What is the weather like in Boa Vista in September?
- In September, Boa Vista averages a daily high of 30.5°C and a low of 25.6°C, with about 43.7 mm of rain over roughly 6.8 rainy days.
- What is the air quality in Boa Vista in September?
- Boa Vista has a mean US Air Quality Index of about 56 in September.