San Sebastián Weather and Climate: A Comprehensive Guide
San Sebastián has a mild maritime climate that is strongly influenced by its location on the Bay of Biscay. Because of this influence, the average temperatures here is slightly lower than those of the other coastal areas located on the Mediterranean Sea. It's not often cold in San Sebastián and frost or night frost will rarely occur. There is a lot of precipitation in San Sebastián throughout the year compared to the rest of Spain. The summers are a little bit drier than the winter months, but there is a chance of rain year round.
Average maximum day and minimum night temperature
Visitors to San Sebastián can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 24°C in August, the warmest time of the year, to a moderate 12°C during cooler months like February.
At night, temperatures typically drop to an average of around 7°C during these months. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
San Sebastián is known for its substantial rainfall, with annual precipitation reaching 1500 mm. While rainfall varies throughout the year, each season offers its own charm. November brings wetter days averaging 184 mm of precipitation, spread over 17 rainy days. In contrast, July experiences a drier climate, with about 85 mm of rainfall spread across 12 rainy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Seasonal changes in sunshine hours are quite dramatic in San Sebastián. While July receives considerable daily sunshine with up to 6.6 hours, December marks the darkest time of the year, where sunshine is scarce with only 2.7 hours of sunlight per day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Average humidity
The relative humidity is high throughout the year in San Sebastián.
The city experiences its highest humidity in November, reaching 76%. In March, the humidity drops to its lowest level at 70%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
overcast and chance of slight rain overcast and heavy rain broken clouds and rainForecast for San Sebastián
7 m/s
10 m/s
10 m/s
The best time of year to visit San Sebastián in Spain
During the months of June, July, August and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
August has an average maximum temperature of 24°C and is the warmest month of the year.
The coldest month is February with an average maximum temperature of 12°C.
November tops the wettest month list with 184 mm of rainfall.
July is the driest month with 85 mm of precipitation.
July is the sunniest month with an average of 199 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
