The month in detail
What to expect in December
In December, San Sebastián sees 57°F during the day with 2.6h of sunshine per day. Expect rain on 41% of days — a light raincoat in the bag is recommended.
December ranks 10 out of 12 months in San Sebastián. Compared to November: −2°F daytime, 6 pts fewer rainy days.
This month's conditions
What it's like in December
UV index
2 · low
no protection needed
Feels like
dry air
7°
Sea
15°C
cold, for the brave
Daylight
8.8h of daylight
Air quality
good
AQI 26
Compare
Is December the right month?
The best month in San Sebastián is August (8.0/10), 4.0 pts higher than December.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · San Sebastián
Expedia →
Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · San Sebastián
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach trip.
Country · Spain
🗣️LanguageSpanish
💶CurrencyEuro (€)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘModerate · 3/5
🌡️ Climate
🌍Climate typeTemperate oceanic
📈Climate trend ⓘ+2.63°F/decade
🔥Hottest monthAugust · 75°F
❄️Coolest monthJanuary · 54°F
🌧️Rainiest month ⓘNovember · 47%
🏖️ Beach trip
📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) ⓘModérée
🛂VisaSchengen · 90 days
Explore
Other destinations in December
If December doesn't convince you for this destination, compare with others.
Location
Where is San Sebastián ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
SpainTemperate oceanic climate with a 8.0 → 1.1 gap between best and worst month. 10 years of ERA5 data to choose by project.
43.32°N · 1.98°W
Questions
Frequently asked questions
What is the best time to visit San Sebastián?
August is the best month with 75°F highs, 64°F lows, 6.7h of sunshine and 32.0% rainy days. The months of August & July offer comparable conditions.
How many hours of sunshine does San Sebastián get in August?
San Sebastián averages 6.7 sunshine hours per day in August. It is the sunniest month with a climate score of 7.4/10.
What is the rainiest month in San Sebastián?
January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in San Sebastián in August?
In August, overnight lows reach 64°F, while afternoon highs average 75°F.
Is San Sebastián good in winter?
In winter (December-February), San Sebastián scores 3.0/10 on average — Difficult period — prefer the peak season.. The best month overall remains August with a score of 7.4/10.
When should you avoid San Sebastián?
January is the most difficult month to visit San Sebastián, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in San Sebastián in December?
In December, the sea averages 59°F in San Sebastián: cold, for the brave. Best left to hardened swimmers or those with a wetsuit.
Do you need sun protection in San Sebastián in December?
The average UV index reaches 2 in December in San Sebastián (low), with about 8.8h of daylight. No protection needed.