Weather: San Sebastián — December
It's a rainy period, but great for indoor activities, museums, and lower prices.
☔ Climate Overview
December is a wet time to visit San Sebastián. Mild temperatures around 14°C make it comfortable for exploring. This is one of the wettest months—waterproof gear is essential. With only around 9 hours of daylight, plan outdoor activities earlier in the day. Being off-peak, you'll find better deals and fewer crowds. At 15°C, the sea is too cold for most swimmers.
Based on weather comfort, crowds, prices, and activity options
14°C
10°C
18days
9h
Feels like 12°C / 7°C — wind chill makes it feel cooler
183mm
5.4h/day
81%
Very Humid2
Low22 km/h (gusts 46)
15°C ❄️ Cold
Is December a good time to visit San Sebastián?
It's a rainy period, but great for indoor activities, museums, and lower prices.
Now
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Air Quality
Travel Context
- CrowdsVery Quiet
- Travel Costs Value Rates
Daylight
08:33
17:33
Visiting San Sebastián in December: Pros & Cons
Pros
- Fewer crowds and better hotel deals
Cons
- Frequent rain may disrupt outdoor activities
- Sea too cold for comfortable swimming
- Short days limit outdoor time — plan accordingly
Things to Do in December
Events & Festivals
Recommended for This Weather
San Sebastián Weather by Month
| Month | Avg High | Avg Low | Rain | Sunshine | Humidity | UV Index | Crowds | Condition |
|---|---|---|---|---|---|---|---|---|
| Jan | 13°C | 8°C | 15d (137mm) | 5.8h | 79% Humid | 2.3 Moderate | | Wet |
| Feb | 15°C | 9°C | 12d (92mm) | 7.2h | 77% Humid | 3.6 Moderate | | Good |
| Mar | 15°C | 10°C | 17d (120mm) | 8.6h | 75% Humid | 5.2 High | | Wet |
| Apr | 17°C | 11°C | 14d (99mm) | 9.6h | 77% Humid | 6.9 High | | Wet |
| May | 20°C | 14°C | 16d (103mm) | 10.9h | 80% Very Humid | 8.1 Very High | | Excellent |
| Jun | 23°C | 17°C | 17d (131mm) | 10.4h | 83% Very Humid | 8 Very High | | Excellent |
| Jul | 24°C | 18°C | 12d (52mm) | 11.4h | 82% Very Humid | 8.4 Very High | | Excellent |
| Aug | 25°C | 19°C | 13d (98mm) | 10.6h | 82% Very Humid | 7.5 Very High | | Excellent |
| Sep | 23°C | 17°C | 15d (135mm) | 9.3h | 79% Humid | 5.8 High | | Excellent |
| Oct | 21°C | 15°C | 13d (135mm) | 7.6h | 78% Humid | 4.1 Moderate | | Wet |
| Nov | 16°C | 12°C | 15d (173mm) | 6.1h | 80% Very Humid | 2.5 Moderate | | Wet |
| Dec Current | 14°C | 10°C | 18d (183mm) | 5.4h | 81% Very Humid | 2 Low | | Wet |
San Sebastián
Basque culinary capital, including La Concha beach, La Concha beach promenade and Pintxos bar hopping in Parte Vieja, pintxos bars, and Michelin-starred dining.
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What to Pack for December
Bundle up with a warm coat, scarf, and closed-toe shoes. Thermal layers underneath give flexibility as you move between indoors and outdoors. A waterproof jacket and shoes are non-negotiable — showers are frequent.
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Planning a trip to San Sebastián?
Frequently Asked Questions
Is December a good time to visit San Sebastián?
Does it get cold at night in San Sebastián in December?
What should I pack for San Sebastián in December?
Does it rain a lot in San Sebastián in December?
Can you swim in San Sebastián in December?
How many hours of daylight are there in San Sebastián in December?
Is December peak season in San Sebastián?
More San Sebastián Guides
Best Time to Visit
Coming soon
Things to Do
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Where to Stay
Best neighborhoods and hotel recommendations
Cost & Budget
Daily costs, money-saving tips, and budget breakdown
Itineraries
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Overview
Complete travel guide for San Sebastián: top things to do, itineraries, and typical costs.