Brazil
Rio de Janeiro in August: weather, sea & travel advice
This month's data profile
Strong month under the current formula
Rio de Janeiro in August is climatically well suited to city breaks, family holidays, beach holidays and active holidays and hiking. The average daily high is around 25 °C, and the sea is about 21 °C. With about 8 rainy days it is moderate.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
83/100 · #3
Warmth
#10
Dryness
#3
Sun
#9
Sea warmth
#12
Published best categories: Overall, City break, Active, Family
Rio de Janeiro · AugustPhoto: Jens Hausherr from Hamburg, Deutschland · CC BY-SA 2.0Climate facts
- Average high
- 25 °C
- Average low
- 18 °C
- Sea
- 21 °C
- Rainy days (est.)
- 8 rainy days (est.)
- Sun (est.)
- 5 h/day
- Humidity
- 77 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| July | 24 | 18 | 7 | 46 | 4.5 | 79 | 2.9 | 22 | 84 |
| August (selected) | 25 | 18 | 8 | 47 | 5.3 | 77 | 3.0 | 21 | 83 |
| September | 26 | 19 | 12 | 82 | 5.6 | 78 | 3.1 | 21 | 76 |
How do the previous and next months compare?
Baseline: August (83/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| July | +1 | -0.7 °C | -0.1 °C | -0.9 | -1.3 mm | -0.8 h | +1.1 % | -0.1 m/s | +0.6 °C |
| September | -7 | +0.8 °C | +0.8 °C | +3.5 | +34.7 mm | +0.3 h | +0.4 % | +0.1 m/s | +0.1 °C |
All twelve months in context
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Frequently asked questions
How warm is Rio de Janeiro in August?
The average daily high is around 25 °C, with an average daily low of about 18 °C.
Can you swim in Rio de Janeiro in August?
The sea is about 21 °C (swimmable).
Does it rain a lot in Rio de Janeiro in August?
The curated estimate is about 8 rainy days per month, not a directly measured long-term average. Total precipitation averages around 47 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Rio de Janeiro?
By the climate score, May, June, July and August are the strongest months for Rio de Janeiro. For a beach trip: February, April, May and June. August is one of them.