COVID-19 (Coronavirus)

Due to the impact of Covid-19 (Coronavirus), the Pembrokeshire Coast National Park Authority has closed its headquarters, visitor attractions (Carew Castle, Castell Henllys and Oriel y Parc), its car parks and sections of the Pembrokeshire Coast Path until further notice. All meetings and events are cancelled until further notice. If you have any queries please call 01646 624800 or email

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Home » Enjoying » 60 Iconic Views » Blue Lagoon, Abereiddi

Blue Lagoon, Abereiddi

Blue Lagoon, Abereiddi

About this view

The Blue Lagoon is a reminder of Pembrokeshire’s industrial past, being the site of a former slate quarry. The lagoon was created when the outer wall was breached just over a century ago.

On the walk from the nearby beach at Abereiddi, you will also pass the ruined quarry buildings and slate-workers' cottages.

Nowadays, the site is extremely popular with adventure groups who use the site’s surviving platforms to jump into the deep water below.

The water has a very distinctive blue-green colour, which is caused by the build-up of minerals in the lagoon.

The Blue Lagoon hosted the UK leg of the World Cliff Diving Series in 2012 and 2013.

The Blue Lagoon and much of the coast from here to Porthgain are owned by the National Trust.

Related walks

Abereiddi to Blue Lagoon Wheelchair Walk

Abereiddi to Pwllcaerog - Short Walk

Abereiddi – Short Walk

Porthgain/Abereiddi – Half Day + Walk

Further information

The old sea wall at Abereiddi has been removed by Pembrokeshire County Council and a new shoreline is developing as the sea erodes part of the car park. A new sea defence of boulders is planned once a long term alignment of the shoreline has been reached. This illustrates a new approach linked to an expectation of climate change and sea level rise but may make for some difficulties at the moment as the process establishes.

The site is very heavily used by outdoor activity companies and in recent years the landowner has worked with these companies, the National Trust and the Pembrokeshire Coastal Forum to manage parking and to limit the numbers using the site, especially for coasteering.

There is a booking system for parking and coasteering groups and a code of practice under the Pembrokeshire Outdoor Charter. This helps to safeguard both the natural qualities of this coast and the users’ enjoyment.
The easy access path to the Blue Lagoon was installed in the late 1990s using funding from the European Union via the Pembrokeshire Coast National Park Authority.

How to get there

The Blue Lagoon is near Abereiddi, off the A487 between St Davids and Croesgoch. As the car park can be crowded and uneven, we recommend the best way to get to the Blue Lagoon is by taking the Strumble Shuttle.

Visit Pembrokeshire Greenways for timetables and more information about Coastal Buses.

If you do travel by car, you can also take the narrower coastal road between St Davids and Trefin.

Once at Abereiddi, you can reach this viewpoint by following the acorn signs for the Pembrokeshire Coast Path National Trail. Alternatively, there is a path which leads over a bridge to the lagoon, which is marked on the ‘Wheelchair walk’ above.

For up to date travel information contact Traveline Cymru on 0871 2002233 or visit