May · Spain
Best time to visit San Sebastian in May Weather, crowds & prices
Weather in San Sebastian in May
Average temperature 16°C, 115 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).
May score
5.0/10
Ranked #6 of 12 months
- Avg temp
- 16°C
- Rainfall
- 115 mm
- Humidity
- 83%
- Days with 6h+ sun
- 27
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
May in San Sebastian scores 5.0/10 for beach and coastal travel - an above-average month (#6 of 12). Expect around 16°C, 115 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.
May in San Sebastian — middling scores, decent value
Temperatures hover around 16°C (60°F) — the kind of month where neither heat nor cold forces the schedule.
115 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 5/10 on the same scale — 6th of 12 months, versus 8.4/10 for the best month here.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
Budget for low-season pricing, and crowds are light for this destination. That combination — decent conditions at the lowest rates of the year — is the best value window on this page.
If your dates are flexible, July is materially better in San Sebastian — 3.4 points higher on the same scale.
Frequently asked
- What is the weather like in San Sebastian in May?
- In May, San Sebastian averages 16°C, 115 mm of rain, and about 27 days with 6+ hours of sunshine. Its climate-comfort score is 5.0/10.
- Is May a good time to visit San Sebastian?
- May earns a 5.0/10 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 May?
- Expect about 115 mm of rain in May. 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.