Two males have been charged with assault for allegedly participating in a violent brawl outside a South Auckland pool that was filmed and posted on social media.

The males, aged 18 and 19, are due to face Papakura District Court on Thursday.

Police believe they have also identified a third male allegedly involved in the brawl outside the Massey Park Swimming Pools on January 2, but are still making inquiries to find him.

Counties Manukau Inspector Dave Glossop described the brawl as "disgraceful behaviour".

He earlier said the fight, which first emerged in a video posted online, was between four people, two each from opposing sides.

A police car arrived at scene and officers used pepper spray to break up the fight.

One man is knocked to the ground and appears to have his head stomped on, according to video footage posted online of the fight.