Greggs – Portsmouth, City Centre – Opening Hours & Store Details Greggs occupies an ideal spot at 120 Commercial Road, about a 1.40 mile driving distance south of the centre of Portsmouth (near Portsmouth & Southsea Station). The store is an outstanding addition to the local businesses of Old Portsmouth, Gosport, Baffins, Fratton, Portsea, Portsmouth City Centre, Southsea and Somers Town. It’s open today (Friday) from 5:30 am – 8:00 pm. On this page you may find all the important information about Greggs Portsmouth, City Centre, including the hours of opening, location description or direct phone.