Real Club de Tenis de San Sebastián, Tennis club in San Sebastián, Spain.

The Real Club de Tenis de San Sebastián is a tennis facility in the Basque coastal city featuring twelve clay courts on its grounds. The facility operates year-round to serve members and visitors seeking to play.

Founded in August 1904 as the San Sebastián Recreation Club under president Jorge Satrústegui, it was a multi-sport club from the start. It moved to El Antiguo in 1906 and was refounded on 1 February 1919 as the Real Club de Tenis de San Sebastián. In 1928 it relocated to its current site in the Ondarreta marshes.

The club's grounds at Ondarreta became a hub of the city's social life, hosting events of all kinds. Its international tournament drew champions such as Suzanne Lenglen and Jean Borotra in the 1920s, Bill Tilden in 1933 and 1934, and Manolo Santana, winner in 1960 and 1962.

Visitors can reserve courts through an online booking system and access coaching services, with the facility open daily from early morning through late evening. This schedule accommodates players with varying availability throughout the day.

The club's grounds occupy land that was once the Ondarreta marshes, to which it moved in 1928 under an agreement with the city council. The move also covered the meadows of the Campo de Ondarreta, the city's first football pitch, which disappeared at that time.