North Queensland fullback Valentine Holmes is set to spend the next month on the sidelines following a shoulder injury sustained in the 2021 Origin series finale.

Holmes suffered the AC joint setback during Queensland's victory over the Blues on the Gold Coast, with the Cowboys now confirming the extent of the injury.

The injury was sustained just prior to the intermission of Origin III, and kept the Queensland speedster out of the game.

The Maroons outside-back will not require surgery on his shoulder, but will require close to four weeks worth of recovery.

The Cowboys are scheduled to face the Roosters this weekend before clashes against the Storm, Broncos and Titans.

Holmes joins the likes of Reuben Cotter, Ben Hampton and Heilum Luki on the sidelines in Townsville.