Police say that either on the 6th, 7th, or 8th of June, the suspect walked past the girl multiple times, then followed her and touched her inappropriately.
He’s described as white, in his 40s or 50s, in New Balance trainers, with a large build but walking a small grey dog on a lead.
The force will be stepping up patrols in the area, and are asking anyone with information to contact them.