Saint Tudwal's Islands (Welsh: Ynysoedd Tudwal) are a small archipelago lying south of Abersoch on the Llŷn Peninsula in North Wales, at the western end of Tremadog Bay. They were referred to as the Studwells in the early 19th century.^[1][2] The name of the islands derives from their traditional identification as the site of a hermitage used by Saint Tudwal during the 6th century. They are about 1 kilometre (0.6 mi) east of the southern tip of the Llŷn Peninsula.^[3]

There are two main islands: Saint Tudwal's Island West (Welsh: Ynys Tudwal Fawr)(52°47′56″N 4°28′18″W / 52.7988°N 4.4718°W / 52.7988; -4.4718 (Saint Tudwal's Island West)) and Saint Tudwal's Island East (Welsh: Ynys Tudwal Fach) (52°48′19″N 4°27′43″W / 52.8053°N 4.4620°W / 52.8053; -4.4620 (Saint Tudwal's Island East)), plus the Carreg y Trai rocks.

The islands are part of the Llŷn Area of Outstanding Natural Beauty and are known for their beaches and wildlife, having a variety of wild birds including razorbills, guillemots and choughs, and being a breeding site for grey seals. They are also popular for water sports. The western island houses the St Tudwal’s Lighthouse,^[3] and the eastern has the remains of a priory. The western island reaches 144 feet (44 metres) and is the higher of the two.

Saint Tudwal's Island East (Welsh: Ynys Tudwal Fach) is a grass covered, kidney-shaped island, about 550 yards (500 m) in length and 220 yards (200 m) in width. It was owned by author Carla Lane until her death in May 2016.

The highest point on the island is 125 feet (38 m) above sea level. It is located just over 0.62 miles (1.00 km) off the Llŷn Peninsula in Gwynedd. The nearest settlement (apart from the lighthouse on Saint Tudwal's Island West) is Machroes. Small ships sail from the nearby town of Abersoch to take passengers to view the wildlife. The island is believed to be the original hermitage of Saint Tudwal, which is presumably where its name comes from. The remains of a priory, referred to in the 1291 tax rolls, are on its eastern side.^{[citation needed]}

The West island is 650 metres (710 yd) long and 167 metres (183 yd) at its widest point. It was sold into private ownership in 1935. More recently it was purchased by the adventurer Bear Grylls who holidays on the island, living in the former lighthouse keeper's cottage.^[3] On 22 August 2013 it was reported that he was facing a planning investigation by Gwynedd Council, after installing a slide into the sea.^[4] He has since taken the slide down, saying it was never intended to be permanent and that he would clear it with the council before using it again.^[5]

Wikimedia Commons has media related to Saint Tudwal's Islands.

• www.geograph.co.uk : photos of St Tudwal's Islands