One of the most popular resorts on the island, Trearddur Bay is situated two miles south of Holyhead, on the west coast of Holy Island. It was once known as Towyn-y-Capel, but the name was subsequently changed to avoid confusion with other coastal Towyns in Wales. The reference to a capel or chapel is to the Church of St Bridget, or St Ffraid. This was located on a small mound in the middle of the horseshoe shaped bay, a location vulnerable to coastal erosion and storms. A Celtic cross, erected for the 2000 millennium, now marks the site of the chapel.
Trearddur Bay has a small park, with football pitch, and Holyhead Golf Course, an eighteen hole links course, is on the outskirts of the village.