The assault took place on Holland Way at approximately 10.45pm on April 13.
The force says that officers investigating the assault are appealing or dashcam or CCTV footage from Holland Way and the surrounding area.
Those with relevant footage or any information that could help the investigation are encouraged to contact South Wales Police, quoting reference 2600113593.
South Wales Police can be contacted via their website or by calling 101.
Alternatively, those looking to give information can contact Crimestoppers anonymously on 0800 555 111.
A post released on South Wales Police’s social media says: “Were you at Holland Way, Barry at around 10:45pm on April 13th?
“Officers investigating a report of an assault are today appealing for witnesses to come forward.
“If you saw anything, have any dashcam or CCTV from Holland Way or the surrounding area, or information that could help the investigation, please contact South Wales Police quoting reference 2600113593 by:
“• Via https://bit.ly/SWPProvideInfo
“• Call 101 or Crimestoppers anonymously on 0800 555 111.
“Always call 999 in an emergency.”
