August · Portugal
Best time to visit Lisbon in August Weather, crowds & prices
Weather in Lisbon in August
Average temperature 21°C, 1 mm of rain, about 31 days with 6+ hours of sunshine and 82% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
9.4/10
Ranked #5 of 12 months
- Avg temp
- 21°C
- Rainfall
- 1 mm
- Humidity
- 82%
- Days with 6h+ sun
- 31
- Crowd Density
- Peak Tourist Rush
- Average Expenses
- $$$ · Peak Season Rates ($$$)
August in Lisbon scores 9.4/10 for sightseeing and cultural travel - an above-average month (#5 of 12). Expect around 21°C, 1 mm of rain, and roughly 31 days with 6+ hours of sunshine this month.
Hill-climbing trams, panoramic miradouros, and soft Atlantic light make April through June Lisbon at its finest.
August ranks 5th of 12 for Lisbon — one of the best windows
At 21°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 13.5 hours of daylight.
On our climate-comfort scale this is one of the strongest months of the year for Lisbon at 9.4/10 (5th of 12), just behind April at 9.5/10.
Pack light clothing, a hat and real sun protection.
Budget for peak pricing, and this is one of the busiest months here.
Frequently asked
- What is the weather like in Lisbon in August?
- In August, Lisbon averages 21°C, 1 mm of rain, and about 31 days with 6+ hours of sunshine. Its climate-comfort score is 9.4/10.
- Is August a good time to visit Lisbon?
- August earns a 9.4/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Lisbon in August?
- Expect about 1 mm of rain in August. Average humidity is 82% and there are about 31 days with 6+ hours of sunshine.
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