The Beach Boys Today! is the eighth studio album by the American rock band the Beach Boys, released March 8, 1965, by Capitol Records. It signaled a departure from their previous records with its orchestral sound, intimate subject matter, and abandonment of car or surf songs. Side one features an uptempo sound, while side two consists mostly of introspective ballads. Supported by this thematic approach, the record established the group as album artists rather than just a singles band.

The album was produced, arranged, and largely written by Brian Wilson with additional lyrics by Mike Love. Most of it was recorded in January 1965 with the aid of over 25 studio musicians shortly after Wilson had suffered a nervous breakdown and stopped touring with his bandmates. Building on the advancements of All Summer Long (1964), Today! showcased more refined performances, denser and richer arrangements, slower tempos, longer structures, and influences drawn from Phil Spector and Burt Bacharach.

Unlike their prior albums, none of the songs employ just traditional rock instrumentation as accompaniment. Instead, a more eclectic selection of instruments, including timpani, harpsichord, vibraphone, and French horn, feature throughout the album. Lyrically, Wilson developed a more personalized, semi-autobiographical approach, with his songs written from the perspective of vulnerable, neurotic, and insecure narrators. The LP includes "She Knows Me Too Well", about a man who acknowledges his cruel treatment of his girlfriend, "Don't Hurt My Little Sister", about a sibling who appears to conflate fraternal and romantic feelings for his younger sister, and "In the Back of My Mind", a ballad that ends with a breakdown of instruments playing asynchronously.

Today! reached number four in the U.S. during a 50-week chart stay and yielded three top 20 singles: "When I Grow Up (To Be a Man)" (number 9), "Dance, Dance, Dance" (number 8), and "Do You Wanna Dance?" (number 12). A rerecorded version of "Help Me, Rhonda", issued in April, became the band's second number-one hit in the US. In the UK, the album was released in April 1966 and peaked at number 6. Today! continues to attract critical acclaim, with commentators usually focusing on the second side of the record, often describing it as a precursor to Pet Sounds (1966).