Holywell (Cornish: Tregew) is a coastal village in the civil parish of Cubert (Cornish: Lannowyn), in north Cornwall, England, United Kingdom. It is at Holywell Bay (Cornish: Porth Heylyn), about three miles (5 km) west-southwest of Newquay.Holywell beach adjoins the settlement to the northwest and Penhale Camp, formally an army training establishment that was regularly used by cadets, is half-a-mile to the southwest. On the north side of Holywell beach Holywell Cave is accessible at low tide and contains many pools formed by natural buildup of minerals. In the cave is St Cubert's holy well.On the east of the beach, there is a 5,000 year old sand dune system that is one of the largest in Britain. During the summer, tourists can use these dunes for Sandboarding.
There are two holiday parks just outside of the village. Holywell Bay Holiday Park, operated by Parkdean Resorts, and Trevornick campsite.
W. J. Burley, the author of the Wycliffe novels, lived in Holywell until his death in 2002.Holywell bay is also the residence of both Maia Garner and Louis Garner, athletes that have represented Great Britain in Surf Lifesaving Sport.