Decathlon – West Thurrock, Lakeside – Opening Hours & Store Details Decathlon, which currently occupies a unit in Thurrock Shopping Park, is situated on Weston Avenue, about 2.28 miles west from the centre of Grays, in West Thurrock (near to intu Lakeside and Lakeside Retail Park). This store serves the shoppers of Purfleet, Chafford Hundred, Wennington, South Stifford, Grays, South Ockendon, Aveley, West Thurrock and Badgers Dene. 9:00 am until 8:00 pm are its opening hours for today (Friday). On this page you may find all the beneficial information about Decathlon West Thurrock, Lakeside, including the operating times, address particulars or phone info.