August · Portugal
Best time to visit Sintra in August Weather, crowds & prices
Weather in Sintra in August
Average temperature 20°C, 1 mm of rain, about 31 days with 6+ hours of sunshine and 78% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
9.6/10
Ranked #3 of 12 months
- Avg temp
- 20°C
- Rainfall
- 1 mm
- Humidity
- 78%
- Days with 6h+ sun
- 31
- Crowd Density
- Peak Tourist Rush
- Average Expenses
- $$$ · Peak Season Rates ($$$)
August in Sintra scores 9.6/10 for sightseeing and cultural travel - one of the top 12-month picks (#3). Expect around 20°C, 1 mm of rain, and roughly 31 days with 6+ hours of sunshine this month.
Sintra's palaces and gardens climb the hills west of Lisbon among mist and forest.
August ranks 3rd of 12 for Sintra — one of the best windows
At 20°C (69°F) this is comfortable city weather in August, with sightseeing easiest before lunch and after the afternoon peak.
At just 1 mm for the month, rain will not shape your plans; you get about 31 days with 6+ hours of sunshine and 13.6 hours of daylight.
On our climate-comfort scale this is one of the strongest months of the year for Sintra at 9.6/10 (3rd of 12), just behind May at 9.7/10.
Pack light clothing, a hat and real sun protection.
Budget for peak pricing, and this is one of the busiest months here. 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 Sintra in August?
- In August, Sintra averages 20°C, 1 mm of rain, and about 31 days with 6+ hours of sunshine. Its climate-comfort score is 9.6/10.
- Is August a good time to visit Sintra?
- August earns a 9.6/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Sintra in August?
- Expect about 1 mm of rain in August. Average humidity is 78% and there are about 31 days with 6+ hours of sunshine.
Curated in Sintra
Tickets & experiences
Things to do in Sintra
Sintra, Portugal. Live activities and tours from GetYourGuide, matched to this destination.