Porthgain to Abereiddi coastal walk

Walking trail

Enjoy some of Pembrokeshire’s finest coastal scenery while exploring its industrial past. The tiny fishing port of Porthgain used to export road stone all over the UK, while Abereiddi’s famous Blue Lagoon was once an old slate quarry. Ynys Barri (or Barry Island) is also home to a fantastic array of wildlife.

Sunset from the Blue Lagoon


Porthgain to Abereiddi map


Porthgain, grid ref: SM816325


Walk along the south side of Porthgain Harbour below the brick hoppers. To reach the coast path, climb some steps next to a white building. Take time to explore the granite quarry workings.

Read more


At a sharp left bend in the path at a field corner, the tower above Abereiddi comes into view. Continue on the coast path along a section of very dramatic, high cliffs.

Read more


Steps from here lead down to the tiny beach at Traeth Llyfn. Secluded and remote, the shore is completely covered by the highest tides. There can also be nasty rip currents so it's not good for swimming, just paddling and sandcastle building.

Read more


The coast path continues over open grassland to Abereiddi. Great care should be taken as you approach the Blue Lagoon. The views are spectacular but the cliff edge is sudden. The Blue Lagoon is a great place for diving and coasteering. The path skirts along the cliffs before zig-zagging down towards Abereiddi beach. Catch the Strumble Shuttle bus to Porthgain, St David's or Fishguard, or continue walking inland for a circular route back to your start point.


Walk towards the car park and toilets. Follow the yellow footpath arrows up a short slope and pick up a broad grassy footpath leading inland. From here you get lovely views up the valley towards Llanrhian; this was carved by glacial meltwater during the last Ice Age. It actually continues for 2 miles (3.2km) out to sea along the sea bed.


Cross a stile, cut across the corner of the field and head over another stile by a pile of rocks. Follow a wide track eastwards to Barry Island Farm.


Take this track down to the road and cross to the other side, climbing some slate steps into a field.


Walk straight across the field and go over a stile and along a hedge to a kissing gate. Follow this route back to Porthgain.


Porthgain, grid ref: SM816325

You made it

Following this trail on mobile or tablet? Share your experience.

Porthgain to Abereiddi coastal walk


4 mile (6.4km) circular walk or 2 mile (3.2km) from Porthgain to Abereiddi. Mainly level, grassy cliff-top paths. Some steep climbs and descents (height gain of 985ft (300m)), steps, stiles and kissing gates in places. Take care at edges and overhangs.

Porthgain to Abereiddi coastal walk

Contact us

Porthgain to Abereiddi coastal walk

How to get here

Porthgain, Pembrokeshire, SA62
By road

Turn off A487 at Croes Goch, taking signs for Llanrhian.

By foot

On the Pembrokeshire Coast Path between St David’s and Fishguard.

By bus

Strumble Shuttle bus to Abereiddi and Porthgain from St David’s and Fishguard (near the station) in the summer and a less regular service in winter.

By bicycle

The Celtic Trail, see Sustrans National Cycle Network Route 4, travels along quiet lanes 0.5 miles (0.8km) away from the coastline.

Porthgain to Abereiddi coastal walk

Facilities and access

  • Car park and toilets at Porthgain Harbour