She was approached by a man who, after a brief conversation, tried to hug her before grabbing her bottom with both hands.
The woman pushed the man away and he then approached another woman in the area.
The States police say the man was seen in the same area at the same time the following morning.
He is described as having dark skin, thick, short brown hair, bumpy and scarred skin around his nose and mouth and a small pot belly.
He is about 5 ft 5 ins tall and was wearing a grey polo shirt with a dark stripe going across the chest, back jeans and square prescription glasses.
Anyone with information is being asked to phone the States police on 612612 or Crimestoppers on 0800 555 111.