August · Spain
Best time to visit San Sebastian in August Weather, crowds & prices
Weather in San Sebastian in August
Average temperature 21°C, 136 mm of rain, about 27 days with 6+ hours of sunshine and 83% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
7.2/10
Ranked #2 of 12 months
- Avg temp
- 21°C
- Rainfall
- 136 mm
- Humidity
- 83%
- Days with 6h+ sun
- 27
- Crowd Density
- Peak Tourist Rush
- Average Expenses
- $$$ · Peak Season Rates ($$$)
August in San Sebastian scores 7.2/10 for beach and coastal travel - one of the top 12-month picks (#2). Expect around 21°C, 136 mm of rain, and roughly 27 days with 6+ hours of sunshine this month.
San Sebastián wraps a shell-shaped bay, pintxos bars and the Basque coast into Spain's gastronomic capital.
August in San Sebastian: strong conditions, 2nd of 12
With 21°C (70°F) on average, August delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
136 mm of rain makes this a wet month here, though with about 27 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.2/10 on the same scale — 2nd of 12 months, versus 8.4/10 for the best month here.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
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 San Sebastian in August?
- In August, San Sebastian averages 21°C, 136 mm of rain, and about 27 days with 6+ hours of sunshine. Its climate-comfort score is 7.2/10.
- Is August a good time to visit San Sebastian?
- August earns a 7.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in San Sebastian in August?
- Expect about 136 mm of rain in August. Average humidity is 83% and there are about 27 days with 6+ hours of sunshine.
Curated in San Sebastian
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Things to do in San Sebastian
San Sebastian, Spain. Live activities and tours from GetYourGuide, matched to this destination.