September · Brazil
Best time to visit Búzios in September Weather, crowds & prices
Weather in Búzios in September
Average temperature 23°C, 45 mm of rain, about 19 days with 6+ hours of sunshine and 78% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
8.8/10
Ranked #1 of 12 months
- Avg temp
- 23°C
- Rainfall
- 45 mm
- Humidity
- 78%
- Days with 6h+ sun
- 19
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
September in Búzios scores 8.8/10 for beach and coastal travel - the single best month of the year. Expect around 23°C, 45 mm of rain, and roughly 19 days with 6+ hours of sunshine this month.
Búzios strings 20-plus crescent beaches on a peninsula of boutique hotels east of Rio. Best window: the drier months outside peak monsoon.
September in Búzios — the year's strongest window
September averages 23°C (73°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 45 mm, so plan one flexible day in three; you still get about 19 days with 6+ hours of sunshine and 11.9 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Búzios at 8.8/10 — the reference point every other month on this page is measured against.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
Figure on peak pricing, with 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 Búzios in September?
- In September, Búzios averages 23°C, 45 mm of rain, and about 19 days with 6+ hours of sunshine. Its climate-comfort score is 8.8/10.
- Is September a good time to visit Búzios?
- September earns a 8.8/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Búzios in September?
- Expect about 45 mm of rain in September. Average humidity is 78% and there are about 19 days with 6+ hours of sunshine.
Curated in Búzios
Tickets & experiences
Things to do in Búzios
Búzios, Brazil. Live activities and tours from GetYourGuide, matched to this destination.