Greggs – Osprey Quay, Portland – Opening Hours & Store Details Greggs is currently located on Mereside, a 0.30 mile distance south-west from the centre of Portland (close to RNAS Portland and Osprey Quay Business Park). The store is an outstanding addition to the local businesses of Portland Town Centre, Portland Heights, Castletown, Easton, Fortuneswell, Clay Ope, The Grove and Chiswell. Today (Friday), its operating times are from 6:00 am – 5:00 pm. This page will provide you with all the information you need on Greggs Osprey Quay, Portland, including the hours of opening, address, customer reviews and more info.