What is recorded here

Porth y Wylfa is shown as a bay on the public map of Ynys Môn / Isle of Anglesey. The saved point is the map point or the centre of its mapped shape.

Porth y Wylfa is a coastal bay on the Isle of Anglesey, featuring sea cliffs composed primarily of Silurian greywacke and mudstone, formed around 440–420 million years ago. These rocks are part of the Welsh Basin sequence, shaped by deep-marine sedimentation and later uplifted during the Caledonian orogeny, making the area notable for its well-exposed ancient sedimentary formations.

This does not grant access. Check current paths, opening conditions and ownership before entering.