The 23-year-old is accused of attacking the woman, aged in her early 20s, next to the Jersey Maritime Museum at about 1am on Sunday. The States police say the pair are believed to know each other.
The suspect has been questioned and bailed pending further inquiries.
In a statement, the States police said: ‘It is known that there were several people in the area at the time of the incident. The police would like to speak to anyone who may have seen this incident or who has any information regarding it.’
Anyone with information is being asked to contact the States police on 612612 or Crimestoppers on 0800 555 111.
