San Sebastián: Weather Guide & Climate
Complete month-by-month weather guide: San Sebastián. Best time to visit: May, June, July, August, September. Plan your trip with detailed climate data.
Climate Overview
San Sebastián has a moderate climate with average yearly highs of 18°C, lows of 13°C, and approximately 15 rainy days per month.
The best time to visit San Sebastián is during May, June, July, August, September, when conditions are perfect for sightseeing and exploration
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Air Quality
Best Time
May, Jun, Jul, Aug, Sep
Hottest
Coldest
Driest Month
Forecast for your trip dates
Up to 16 days ahead| Month | High | Low | Rainy days | Condition |
|---|---|---|---|---|
| January | 13°C | 7°C | 13 | Wet |
| February | 16°C | 9°C | 12 | Good |
| March | 14°C | 8°C | 16 | Wet |
| April | 18°C | 12°C | 13 | Wet |
| May | 21°C | 14°C | 11 | Excellent (best) |
| June | 20°C | 15°C | 17 | Excellent (best) |
| July | 23°C | 18°C | 10 | Excellent (best) |
| August | 24°C | 18°C | 15 | Excellent (best) |
| September | 23°C | 16°C | 12 | Excellent (best) |
| October | 18°C | 12°C | 22 | Wet |
| November | 18°C | 12°C | 9 | Good |
| December | 12°C | 9°C | 26 | Wet |
Weather data: Open-Meteo Archive (2020-2025) • Open-Meteo.com (CC BY 4.0) • Historical avg. 2020–2025
Weather by Season
Winter
Dec–Feb
High: 14°C
Low: 8°C
Rainy days: 17 days/month
Spring
Mar–May
High: 18°C
Low: 11°C
Rainy days: 13 days/month
Summer
Jun–Aug
High: 22°C
Low: 17°C
Rainy days: 14 days/month
Autumn
Sep–Nov
High: 20°C
Low: 13°C
Rainy days: 14 days/month
Month-by-Month Weather Table
January
February
March
April
May
BestJune
BestJuly
BestAugust
BestSeptember
BestOctober
November
December
| Month | High | Low | Rainy days | Condition | View Details |
|---|---|---|---|---|---|
| January | 13°C | 7°C | 13 | Wet | View Details → |
| February | 16°C | 9°C | 12 | Good | View Details → |
| March | 14°C | 8°C | 16 | Wet | View Details → |
| April | 18°C | 12°C | 13 | Wet | View Details → |
| May (best) | 21°C | 14°C | 11 | Excellent | View Details → |
| June (best) | 20°C | 15°C | 17 | Excellent | View Details → |
| July (best) | 23°C | 18°C | 10 | Excellent | View Details → |
| August (best) | 24°C | 18°C | 15 | Excellent | View Details → |
| September (best) | 23°C | 16°C | 12 | Excellent | View Details → |
| October | 18°C | 12°C | 22 | Wet | View Details → |
| November | 18°C | 12°C | 9 | Good | View Details → |
| December | 12°C | 9°C | 26 | Wet | View Details → |
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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Common Questions
What type of climate does San Sebastián have?
San Sebastián has a Moderate climate with average yearly temperatures of 18°C (highs) and 13°C (lows).
When is the best time to visit San Sebastián?
The best time to visit San Sebastián is during May, June, July, August, September, when temperatures average around 21°C and conditions are ideal for sightseeing.
What are the hottest and coldest months in San Sebastián?
The hottest month in San Sebastián is August with average highs of 24°C, while the coldest is January with average lows of 7°C.
When is the rainy season in San Sebastián?
San Sebastián sees the most rain in December (26 rainy days), while November is the driest month (9 rainy days).
More San Sebastián Guides
Best Time to Visit
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Things to Do
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Itineraries
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Overview
Complete travel guide for San Sebastián: top things to do, itineraries, and typical costs.