Two girls groped at Sydney's Wet'n'Wild

A man has been charged after two teenage girls were groped at Sydney's Wet'n'Wild water park.

Police allege the 39-year-old indecently assaulted the 14-year-old girls inside a shop at Blacktown on Saturday.

The man allegedly followed then touched the girls as he walked past them.

He will face Blacktown Local Court on April 8.

A teenage girl was allegedly groped by a 27-year-old man at the same water park in January.