Greggs – St Mary Street, Weymouth – Opening Hours & Store Details Greggs can be found in an ideal location at 21 St Mary Street, approximately 0.36 miles south-east of the centre of Weymouth (near Debenhams Bus Stop). This store is a brilliant addition to the local businesses of Southill, Radipole, Westham, Weymouth Town Centre, Rodwell, Wyke Regis, Melcombe Regis and Lanehouse. Opening hours for today (Friday) are 7:00 am until 7:00 pm. On this page you will find all the information about Greggs St Mary Street, Weymouth, including the operating times, place of business address details and email address.