Porth Trecastell is beautiful little beach with easy access and good quality sand. It is known in English as Cable Bay, this being the site where underwater cables once reached Anglesey from Ireland and America. Hemmed in by rocky headlands on either side it is well sheltered from rough weather. On a big south westerly swell it does produce decent waves and can be popular with body boarders and kayakers.
The sandy beach is quite narrow but fairly extensive at low tide. It can get fairly busy at times, although the head count is somewhat limited by the relatively small car park.
At low tide some good rock pools are revealed on either side of the bay.
On the headland just north west of the cove there is a fascinating Neolithic tomb called Barclodiad y Gawres which dates from 3000BC. The chamber is locked with a gate, but the central chamber can be viewed from the gate.
Further round on the north side of the headland is the delightful Porth Nobla. This is a superb sandy beach, and is well worth seeking out if Trecastell is crowded.
There are no toilets here but an ice cream van is often present in the car park during the summer months. A few kilometres to the north in Rhosneigr you will find shops, cafes etc.
Dogs are allowed here.
Approach / parking:
There is a roadside car park at the top of the beach, although it tends to fill up quickly on a sunny summer weekend day.