San Sebastián Weather in August
August in San Sebastián brings high temperatures, with highs of 24°C (75°F) and nights dropping to 18°C (64°F). Rainfall is on the higher side this month, averaging around 90 mm (3.5 in), so keep a rain jacket handy.
Rainfall in San Sebastián in August
On average, there are about 13 days with rain during this month, averaging 90 mm (3.5 in). Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in San Sebastián in August
Weather in San Sebastián is at its perfect in August. Highs reach 24°C (75°F), while nights settle around 18°C (64°F). Summer occurs in August. Overall, the month follows a fairly predictable daily temperature pattern. Nights drop to around 18°C (64°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable. On average, it has the peak temperatures of the year.
Sunshine in San Sebastián in August
Enjoy a sunny month with about 198 hours of sunshine, the clear skies make San Sebastián even more beautiful.If you're inclined towards comfortable temperatures and drier conditions, August is a good time to visit San Sebastián.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Spain, check out our San Sebastián's climate page.
San Sebastián Temperature in August
Min Temperature
18°C (64°F)
Max Temperature
24°C (75°F)
Chance of Rain
45%
Precipitation
90 mm (3.5 in)
Rainy days
13 days
Humidity
75%
Sunshine
198 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in San Sebastián typically stay consistent throughout August, with daily highs averaging around 24°C (75°F). Nights are pleasant, with lows around 16°C (61°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for San Sebastián in August
Browse day-by-day weather records for San Sebastián spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Sebastián historical weather extremes in August
Based on 49 years of weather observations in San Sebastián between 1976 and 2025, these are the recorded extremes.
- San Sebastián recorded its highest August temperature of 38°C (100°F) on August 4, 2003.
- On August 22, 1977, San Sebastián saw its coldest August day with temperatures maxing out at 17°C (63°F).
- The coldest night in August in San Sebastián was on August 29, 1998, with a minimum of 6°C (43°F).
Best Places in Spain in August
Find out more about the weather in Spain and which places have the best travel conditions in this month. See all of Spain in August →
perfect weather
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What to Wear in San Sebastián in August
For San Sebastián in August, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in San Sebastián in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Spain, check out our San Sebastián's climate page.
Temperature Rainfall Sunshine Humidity
See the full San Sebastián climate overview or explore weather in Spain.
