Footage has emerged of a group of guests fighting on a party boat hired for a birthday party in New York City, USA.

The footage, shot in 2015, shows agitation and two men fighting before more of the guests join the brawl forcing security guards to intervene.

"The night was a blast until we pulled in pier side," the filmer wrote online.

"Once the boat docked a huge fight broke out. Don't know why people were fighting but I wanted to record the whole thing until my friends dragged me away to stop recording," he added.