"The Zephyr Song" is a song by American rock band Red Hot Chili Peppers, released as the second single released from their eighth studio album, By the Way (2002), on August 17, 2002. The song, as a single, was released in two parts. Both editions held two previously unheard-of B-sides, making it, collectively, hold four non-LP tracks. The single peaked at number six on the US Billboard Modern Rock chart, breaking the band's streak of three straight number-one hits.
The song is about nature's healing power and human connection. In April 2017, it was revealed that John Frusciante unintentionally interpolated the song "Pure Imagination" from the 1971 film Willy Wonka & the Chocolate Factory. The song's opening three guitar notes are the same as the first three sung notes from "Pure Imagination".