 In fact, the city centre and the districts of Amara Berri and Riberas de Loiola lie on the former bed of the river, which was diverted to its current canalized course in the first half of the 20th century.San Sebastián features an oceanic climate (Köppen "Cfb") with warm summers and cool winters.Like many cities with this climate, San Sebastián typically experiences cloudy or overcast conditions for the majority of the year, typically with some precipitation.