San Sebastián in May
In May, San Sebastián averages 19°C (66°F) during the day and 12°C (53°F) at night, with frequent rain — about 16 days of the month see precipitation (122 mm total).
ShoulderConditions are comfortable for sightseeing without being sweltering. Expect daily rain or showers, often in heavy bursts.
May offers comfortable temperatures in San Sebastián, with some rain to plan around.
How May compares to the rest of the year in San Sebastián
May is in the middle of the year for warmth in San Sebastián (6th of 12) and moderately rainy compared to the rest of the year (4th of 12). Daytime temperature runs 1°C above the annual average (18°C). May runs 2°C warmer than April (17°C) and warms a further 3°C into June (22°C).
May sunrise & sunset in San Sebastián
Times shown for San Sebastián local time (Europe/Madrid), calculated for the 15th of May. They shift by a few minutes day to day across the month.
Photography light in San Sebastián — May
Golden-hour and blue-hour windows for the 15th of May, in San Sebastián's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — San Sebastián in May
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 May's tier (Shoulder) and San Sebastián's popularity.
Crowds & pricing — May in San Sebastián
San Sebastián is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: comfortable tourism weather
Sun & mosquito risk — May 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 May weather
🌍 See the full ranked list of climate twins for San Sebastián in May →
Frequently asked questions
How hot is San Sebastián in May?
In May, San Sebastián averages a high of 19°C (66°F) and a low of 12°C (53°F) — generally mild and pleasant.
Does it rain a lot in San Sebastián in May?
May is quite rainy in San Sebastián, with about 16 rainy days on average.
Is May a good time to visit San Sebastián?
May is mild and pleasant but on the rainy side. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for San Sebastián in May?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full May packing list for San Sebastián for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.