The 27-year-old was pushing a baby in a pram along the path when she was passed by a man. The woman felt someone touch her inappropriately on the bottom and turned around to see the same man looking at her. He then turned and walked away towards Carlton Street.
The suspect was described as being about 17 years old, white, around 5ft 5ins tall, of medium build with collar length blond or ginger hair and carrying a blue rucksack.
If you think you know who this man is or have any information relating to this incident please call 101 quoting log 379 of 07/12/16 or call Crimestoppers anonymously on 0800 555 111.