His style fits into the late Romantic idiom, directly inherited from Wagner, and with a strong influence from Basque culture.
After completing his early studies with the Piarists and the Jesuits of Zaragoza[2] he moved to Madrid, where he received lessons from Valentín Arín.
Later, in Bilbao, he received violin lessons from Lope Alaña, who introduced him to the society called "El Cuartito", and studied harmony with José Sáinz Besabe (Menéndez and Pizà 2001).
At the age of 18 he enrolled in the Schola Cantorum in Paris, studying organ with Abel Decaux, composition with Auguste Sérieyx, and fugue and counterpoint with Vincent d'Indy.
He then moved to Brussels, where he studied with Joseph Jongen and in Cologne with Otto Neitzel, following the recommendations of Resurrección Maria de Azcue.
Strongly influenced by Richard Wagner and other late-Romantic musicians, he found inspiration in the roots of Basque folklore in his first scores, and which later give body and soul to his compositions.
From chamber music (string quartets), vocal and choral compositions, orchestral works, liturgical and concert pieces for the organ, operas (Mirentxu and Amaya) and zarzuelas (El Caserio, La Meiga, etc.).
Among his works are: El Caserio (1926), Diez melodias Vascas (1940), Así cantan los chicos (1909), Amaya (1920), Mirentxu (1910), Una aventura de Don Quixote (1916), La Meiga (1929), Seis canciones castellanas (1939), Pyrenean Symphony (1945), and Homenaje a Walt Disney, for piano and orchestra (1956).
Guridi's music writing is characterized by the clarity of its formal organization, by the strength and richness of its harmony and the inspiration of the melodies.
Probably his best known zarzuela and work is El Caserío (The farmhouse, libretto by Guillermo Fernández Shaw and Federico Romero), premiered in Madrid in 1926.
He also composed Basque Legend in 1915, the symphonic poem An Adventure of Don Quixote (1916) and En un barco fenicio (In a Phoenician ship), in 1927.
In 1909, when he was still very young, he won the Gold Medal in the Valencia Regional Exhibition, with his Fantasy for great organ, a piece composed between 1906 and 1907 and premiered by Guridi himself.
The other composers awarded in the competition were Tomás Garbizu, Luis Urteaga and José María Nemesio Otaño.
Shortly before his death in 1961, he composed a Final for organ, a composition of great character in the line of the French master Louis Vierne.