San Sebastián in August
In August, San Sebastián averages 24°C (75°F) during the day and 17°C (63°F) at night, with around 12 days of rain (102 mm total).
Peak seasonConditions are comfortable for sightseeing without being sweltering. Plan for unsettled weather and bring rain gear.
August offers comfortable temperatures in San Sebastián, with some rain to plan around.
How August compares to the rest of the year in San Sebastián
August is one of the warmest months in San Sebastián (1st of 12) and one of the driest months (11th of 12). Daytime temperature runs 6°C above the annual average (18°C). August runs 1°C warmer than July (23°C) and cools 1°C in September (23°C).
August sunrise & sunset in San Sebastián
Times shown for San Sebastián local time (Europe/Madrid), calculated for the 15th of August. They shift by a few minutes day to day across the month.
Photography light in San Sebastián — August
Golden-hour and blue-hour windows for the 15th of August, in San Sebastián's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — San Sebastián in August
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on August's tier (Peak season) and San Sebastián's popularity.
Crowds & pricing — August in San Sebastián
San Sebastián is in peak season during this month — expect bigger crowds at famous sights, higher hotel and flight prices, and longer queues. Restaurant reservations a few days out are advisable, and any boutique hotels you have your eye on should be booked weeks ahead. The trade-off: most attractions, restaurants, and seasonal services are fully open, the weather is at its most reliable, and the city feels at its most alive.
Why this tier: excellent tourism weather Northern Hemisphere summer holidays
Sun & mosquito risk — August in San Sebastián
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
San Sebastián in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 12°C / 53°F | 6°C / 43°F | 220 mm | 17 | — |
| February | 13°C / 56°F | 7°C / 44°F | 166 mm | 15 | — |
| March | 15°C / 58°F | 8°C / 46°F | 155 mm | 17 | — |
| April | 17°C / 62°F | 10°C / 49°F | 118 mm | 14 | — |
| May | 19°C / 66°F | 12°C / 53°F | 122 mm | 16 | — |
| June | 22°C / 71°F | 15°C / 59°F | 106 mm | 14 | — |
| July | 23°C / 74°F | 17°C / 63°F | 76 mm | 13 | — |
| August | 24°C / 75°F | 17°C / 63°F | 102 mm | 12 | — |
| September | 23°C / 73°F | 16°C / 60°F | 112 mm | 12 | — |
| October | 20°C / 69°F | 14°C / 56°F | 121 mm | 13 | — |
| November | 15°C / 60°F | 10°C / 50°F | 229 mm | 18 | — |
| December | 14°C / 57°F | 8°C / 47°F | 177 mm | 15 | — |
Other cities with similar August weather
🌍 See the full ranked list of climate twins for San Sebastián in August →
Frequently asked questions
How hot is San Sebastián in August?
In August, San Sebastián averages a high of 24°C (75°F) and a low of 17°C (63°F) — generally warm.
Does it rain a lot in San Sebastián in August?
August can be fairly wet in San Sebastián, with about 12 rainy days on average.
Is August a good time to visit San Sebastián?
August is warm. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for San Sebastián in August?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full August packing list for San Sebastián for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.