Two Sydney men who had been attending a church camp on Queensland's Gold Coast have been denied bail on serious assault charges.

Amanaki Kaufusi, 21, and Onesi Taufui, 18, appeared before the Southport Magistrates Court today.

Both are charged with grievous bodily harm.

The police prosecutor told the court that Kaufusi and Taufui had been attending a church camp at Tallebudgera.

They were drinking with friends in Surfers Paradise and around 4:00am (AEST) yesterday when the assault occurred.

The court was told Kaufui said he wanted to hit somebody.

He is accused of striking a 24-year-old man in Cavill Avenue.

Taufui allegedly stomped on the victim's head.

The court was told the man is in the Gold Coast University Hospital with a broken jaw.

Kaufusi and Taufui are due to appear in court again in February.