Porth TrwynLlanfaethlu, Anglesey

Porth Trwyn, Llanfaethlu, Anglesey, North Wales

Porth Trwyn is a quiet, secluded bay backed by small dunes, with protected National Trust heathland areas to both the north and south. Having numerous secret coves and rocky little bays on either side, it’s a favourite with kids who just love exploring here, as well as poking about in the rock-pools and paddling in its crystal clear waters!
Porth Trwyn is a super beach for fishing, swimming, sunbathing, sandcastle building - and family picnics too!

What Porth Trwyn lacks in facilities, it more than makes up for in terms of its out-of-the-way, peacefulness. On the whole Porth Trwyn never gets very busy, even in the height of summer, so if you’re looking for something wild and often deserted on the beachfront - head west! 


Porth Trwyn only really comes into its own at low tide due to the amount of rocks, shingle and salty smelling seaweed! However, when the sea is out it’s an utter delight! The sandy part of the bay is only revealed at low tide, with pretty pebbles marking the high-tide line. Although parking is limited this, you’ll understand, and appreciate, combined with its off-the-beaten-track nature,  is what keeps it such a lovely, quiet little place to visit.

At a glance
      • Well worth a visit just for its seclusion and scenery!

      • Crystal clear waters.

      • Pretty and protected heathland closeby.

      • Lots of rocky bays, caves and coves to explore closeby.

      • Very often quiet - even in the height of summer!

      • Sits between Church Bay and Sandy Beach - both of which are walkable.

Beach info

Beach type

The top of the beach is pebbly, and can be steep at high tide, but it reveals itself to be sandy as the tide goes out.


There are no facilities on the beach itself. However, there are toilets in the car park and the ice cream van is often parked there in season.


The car park is next to the beach.


Access to the shore is along a short track from the parking area, which is relatively easy. A large blue beach sign indicates the beach.

Dog restrictions

No seasonal restrictions. 

Top tips
Flora & Fauna
Weather & tide







Yes - there is super fishing to be had off Porth Trwyn beach  - especially at high tide - when can stand at the top of it’s steep pebbly beach. Other good fishing marks can be found in the numerous coves and rocky bays closeby - both to the north and south. In the summer expect to catch all the usual including mackerel - and  seabass if you’re lucky! Watch out for rocks and seaweed though!



You are responsible for your own safety when visiting a suggested beach. We make no representations or warranties as to the accuracy of the information on this site in relation to any of the suggested beaches. While we try to ensure that all beaches on this site are suitable for the purpose for which they are suggested, you should be aware that no beach is entirely safe and all beaches carry a degree of risk to person and property. It is your responsibility to ensure that you mitigate any such inherent risks.

We accept no responsibility for loss or damage to personal effects, personal accident, injury or public liability in relation to a suggested beach on this site (although we do not exclude or limit in any way our liability to you where it would be unlawful to do so). Furthermore, while we try to ensure that all suggested beaches are open to the public, this is liable to change and you should ensure that this is the case before you visit. Please respect private property (including livestock), as we accept no responsibility for trespassing or damage to private property, to either you or any third party. Please take extra care around steep drops on cliff paths. Water quality may vary and be aware that some beaches may not allow dogs.

Always follow advice from relevant authorities, including HM Coastguard and any lifeguards present on the beach. Swimming flags must always be adhered to. Currents can be strong enough to drag even a strong swimmer, and rocks and unexpected shallow or deep water may not always be obvious. Swimming should only be done in calm conditions when supervised from land, ideally by a lifeguard on a flagged beach. Avoid swimming around boats, jet skis or surfers. Check the weather forecast and tide timetables in advance of a visit to a beach. Always pack water and appropriate clothing. Be aware of the risk of sunburn and wear a high-factor sun-cream. Children and pets should be supervised at all times, and dogs should be kept on a lead.

The contents of this site is provided for general information only. It is not intended to amount to advice on which you should rely. Where this site contains links to other sites and resources provided by third parties, these links are provided for your information only. Such links should not be interpreted as approval by us of those linked websites or information you may obtain from them. We have no control over the contents of those sites or resources.

If you do find any errors relating to any of our suggested beaches, we would be grateful if you would let us know by emailing us at explore@menaiholidays.co.uk

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