Spain
San Sebastian in January: weather, sea & travel advice
This month's data profile
Rain shapes the decision
San Sebastian in January is climatically mixed. The average daily high is around 11 °C, and the sea is about 13 °C. With about 14 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
26/100 · #12
Warmth
#12
Dryness
#10
Sun
#11
Sea warmth
#10
Published best categories: none
San Sebastian · JanuaryPhoto: Ander.gd · CC BY-SA 4.0Climate facts
- Average high
- 11 °C
- Average low
- 7 °C
- Sea
- 13 °C
- Rainy days (est.)
- 14 rainy days (est.)
- Sun (est.)
- 2 h/day
- Humidity
- 82 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| December | 12 | 8 | 14 | 118 | 1.6 | 82 | 3.7 | 14 | 28 |
| January (selected) | 11 | 7 | 14 | 113 | 1.9 | 82 | 3.7 | 13 | 26 |
| February | 11 | 7 | 12 | 87 | 2.9 | 81 | 3.5 | 12 | 31 |
How do the previous and next months compare?
Baseline: January (26/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| December | +2 | +1 °C | +1.1 °C | ±0 | +4.4 mm | -0.3 h | +0.2 % | +0.1 m/s | +1.3 °C |
| February | +5 | +0.4 °C | ±0 °C | -2.1 | -26 mm | +1 h | -1.2 % | -0.2 m/s | -0.4 °C |
All twelve months in context
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Where to stay in San Sebastian
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Useful next decisions
Frequently asked questions
How warm is San Sebastian in January?
The average daily high is around 11 °C, with an average daily low of about 7 °C.
Can you swim in San Sebastian in January?
The sea is about 13 °C (cold).
Does it rain a lot in San Sebastian in January?
The curated estimate is about 14 rainy days per month, not a directly measured long-term average. Total precipitation averages around 113 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit San Sebastian?
By the climate score, June, July, August and September are the strongest months for San Sebastian. For a beach trip: June, July, August and September. January is not among them.