Decathlon – Southampton – Opening Hours & Store Details Decathlon occupies a location in West Quay Retail Park at 24 Harbour Parade, a 0.49 mile distance south-west from the centre of Southampton (by Westquay North Shopping Centre and The Marlands Mall). This store is beneficial for the people of Banister Park, The Polygon, Newtown-Nicholstown, Freemantle, Southampton City Centre, Northam, Bevois Town and St Mary’s. Today’s (Friday) working times are 9:00 am – 8:00 pm. This page includes business times, local navigation and product ranges for Decathlon Southampton.