A Song of Summer is a tone poem for orchestra by Frederick Delius, completed in 1931.
A Song of Summer derived from an unpublished 1918 symphonic work, originally called Poem of Life and Love. In 1921, Delius told Peter Warlock that he had misplaced most of that score. Delius resumed work on this composition after becoming blind, dictating the notes to his amanuensis, Eric Fenby.
Sir Henry J. Wood conducted the premiere in London on 17 September 1931. Fenby himself also recorded the score, with the Royal Philharmonic Orchestra in a recording released in 1981
Delius explained the context of the tone poem to Fenby by saying:
"I want you to imagine we are sitting on the cliffs of heather and looking out over the sea. The sustained chords in the high strings suggest the clear sky and stillness and calm of the scene...You must remember that figure that comes in the violins when the music becomes more animated. I'm introducing it there to suggest the gentle rise and fall of the waves. The flutes suggest a seagull gliding by."
The tone poem lent its title to the 1968 Ken Russell film Song of Summer, which depicted Eric Fenby's life as Delius's amanuensis. The music appears in the film, along with other Delius works.