The Backrooms movie does not have a confirmed streaming date yet, but current reporting points to a likely U.S. streaming window in August or September 2026 after its theatrical run. Several outlets also say it is expected to land on HBO Max in the U.S.

What’s known

  • The film opened in U.S. theaters on May 29, 2026.
  • Coverage from early June estimated a typical A24-style digital/streaming arrival about three to five months after theaters, which lines up with late summer or early fall.
  • More recent reporting says the streaming date is drawing nearer, but still stops short of naming an official day.

Practical expectation

  • Best guess: late August 2026 to September 2026 for streaming in the U.S.
  • Platform: likely HBO Max in the U.S.
  • UK and other regions: no firm platform or date has been officially confirmed in the coverage I found.

TL;DR

No exact streaming date has been announced yet, but Backrooms is most likely to stream in the U.S. around late summer 2026 , probably on HBO Max.