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Traeth Porthdinllaen Beach

Porthdinllaen

Porthdinllaen, Morfa Nefyn, LL53 6DB (map)

Porthdinllaen
Accessible only by foot, this small 18th century fishing village is an attractive and popular cove.  It consists of a cluster of cottages, a waterside pub (Tŷ Coch Inn) and lifeboat station.  Close to the larger village of Morfa Nefyn, Porthdinllaen has been protected by the National Trust since 1994 and is part of the Llŷn Peninsula and the Sarnau Special Area of Conservation (SAC).

The stretch of coastline extending from Trwyn Porthdinllaen eastwards to Porth y Pistyll is of geological, botanical and marine biological interest.  The diverse geology of the cliffs supports a range of plant communities including maritime heathland, maritime grassland, scrub, sand dune and salt marsh as well as a diverse intertidal seaweed community.  

The hard rock cliffs at Trwyn Porthdinllaen support crevice communities including Rock Samphire and Rock Sea-spurrey with maritime grassland vegetation containing Red Fescue, Thrift, and Spring Squill.

The soft cliffs at Porthdinllaen are rather unstable. They support mosaics of maritime grassland, sand dune and scrub plant communities, depending upon erosion rates. There is a Sand Martin colony in the cliffs. This area has very diverse intertidal habitats. Rock pools at Borth Wen are fascinating to explore. Clear examples of intertidal zonation are visible at Trywyn Porthdinllaen. Beds of Eelgrass, a marine flowering plant, are present on the western side of Porthdinllaen. Elsewhere in the bay, varied and abundant seaweed populations are associated with the reef, rocks and sand-covered shore. Seabird watching from Trwyn Porthdinllaen is often rewarding (best in winter), as is seal watching from several points locally (best in summer).
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