A Goulburn man has been hospitalised with head injuries after he was violently attacked outside his house by three young men.

About 11pm on Thursday night, the 48-year-old walked outside his Deccan Street home to check on a commotion when he was approached by the men.

They were armed with weapons and attacked him before fleeing.

Emergency services were called and took the man to Goulburn Base Hospital, where he was treated for head injuries.

Police said the only description of the men was that they were believed to aged 15 to 20 years, and one was wearing a red shirt.

Police have urged anyone with more information about the assault to call Crime Stoppers on 1800 333 000 or online at www.police.nsw.gov.au.