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Best time to visit · Spain
For the most comfortable weather in San Sebastián, aim for May – October. August tops our comfort score at 82/100, with highs around 75°F (24°C) and 2.0 in (51 mm) of rain. March & April are good shoulder-season months. The toughest months are December – February, mainly because of cloud cover.
Highs run from 53°F to 75°F across the year, and the yearly total is about 42.1 in (1070 mm) of rain.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 53°F12°C | 53°F12°C | 57°F14°C | 60°F16°C | 64°F18°C | 71°F22°C | 74°F23°C | 75°F24°C | 72°F22°C | 67°F20°C | 59°F15°C | 54°F12°C |
| Avg low | 47°F8°C | 46°F8°C | 48°F9°C | 52°F11°C | 56°F13°C | 62°F17°C | 65°F18°C | 66°F19°C | 63°F17°C | 59°F15°C | 52°F11°C | 48°F9°C |
| Rain | 5.0 in126 mm | 3.7 in95 mm | 3.5 in90 mm | 3.4 in86 mm | 3.2 in82 mm | 2.7 in68 mm | 1.9 in48 mm | 2.0 in51 mm | 2.5 in64 mm | 3.7 in94 mm | 5.9 in149 mm | 4.6 in117 mm |
| Humidity | 83% | 81% | 80% | 80% | 81% | 80% | 79% | 77% | 76% | 77% | 81% | 82% |
| Cloud | 79% | 73% | 71% | 72% | 72% | 68% | 64% | 64% | 63% | 69% | 76% | 77% |
| Comfort | 54 | 60 | 67 | 73 | 81 | 77 | 81 | 82 | 82 | 81 | 62 | 58 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. The grid cell sits at about 118 m (387 ft), close to San Sebastián's own ~18 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
The coldest season, with highs near 54°F (12°C) and lows down to 46°F (8°C). It's the wettest season, with about 13.3 in (338 mm) of rain, 32% of the year's total. It holds the toughest stretch on our comfort score (December – February), averaging 57/100.
Temperatures climb through the season, from 57°F highs in March to 64°F by May. About 10.2 in (258 mm) of rain falls across these months, 24% of the year's total. Lows bottom out around 48°F (9°C). Comfort peaks here: May ranks with the year's best, and the season averages 74/100.
Peak warmth: highs of 71–75°F (22–24°C). It's the driest season, with only about 6.6 in (167 mm) of rain, 16% of the year's total. July & August feel humid, with humidity near 79%. June – August are among the best-scoring months (season average 80/100).
Temperatures slide from 72°F highs in September to 59°F by November. About 12.1 in (307 mm) of rain falls across these months, 29% of the year's total. Lows bottom out around 52°F (11°C). Comfort peaks here: September & October rank with the year's best, and the season averages 75/100.
By comfort score: 6 Great, 4 Good and 2 Fair. Great months: May – October. Tap a month for its own guide.
For the most comfortable weather in San Sebastián, aim for May – October. August tops our comfort score at 82/100, with highs around 75°F (24°C) and 2.0 in (51 mm) of rain. March & April are good shoulder-season months. The toughest months are December – February, mainly because of cloud cover.
November is the wettest month, averaging about 5.9 in (149 mm) of rain. July is the driest, with about 1.9 in (48 mm). The yearly total is around 42.1 in (1070 mm).
February is the coldest, with average lows of 46°F (8°C) and highs of 53°F (12°C). The warmest is August, with average highs of 75°F (24°C).
Yes: in July & August humidity averages 79% with warm temperatures, so it feels muggy. Summer highs peak around 75°F (24°C).
The wettest three-month stretch is November – January, with about 15.4 in (392 mm) of rain combined. The driest stretch is July – September, with about 6.4 in (163 mm).
Poll the group on May – October dates, then plan the days, packing and costs together.
