The Blue Lagoon in Abereiddy is a former slate quarry that was breached by the sea, resulting in a deep pool of calm, turquoise water framed by jagged cliffs. It is a fantastic spot for anyone who enjoys wild swimming or simply watching the waves crash against the dark rocks. You can walk along the coastal path to see the ruins of old quarry buildings, which add a sense of history to this quiet corner of the Pembrokeshire Coast National Park. Whether you want to try coasteering or just sit on the pebbles and enjoy the breeze, it offers a peaceful escape into nature.
Tucked away on the Pembrokeshire coast, this flooded slate quarry offers a striking contrast between dark rock and vivid water. It is a popular spot for those who enjoy scrambling over rocks or watching brave divers leap from the old stone structures.
Getting to the water involves a walk of about 5 minutes from the main car park at Abereiddy Beach. The path is mostly level, but the ground becomes uneven and rocky as you approach the lagoon itself. There is no charge to look at the view, though a parking fee applies at the beach during the summer season.
You should check the official landmark site for up-to-date information on access and seasonal changes. If you plan on swimming or coasteering, remember the water is deep and stays at a low temperature year-round. Most people spend about 1 hour here just to soak in the scenery and take photos.
The most striking feature is the deep turquoise colour of the water, which is caused by the mineral content in the slate. Unlike the sandy beaches nearby, the edges are framed by jagged, dark grey cliffs that rise roughly 80 feet above the water. You can still see the ruins of the old slate workshops and the wheelhouse sitting on the cliff edge.
It is a fantastic place to watch local groups practice coasteering. You will often see people climbing the walls or jumping from the varying heights of the old quarry levels. The contrast of the industrial ruins against the wild Atlantic Ocean gives the location a very specific, rugged atmosphere.
This site was once a working slate quarry until it was deliberately breached by the sea in 1910. A narrow channel was blasted through the rock to allow the ocean to flood the pit, creating a safe harbour for boats to transport the slate. Before it closed, the quarry was an active industrial hub for the local community throughout the 19th century.
The slate from here was used for roofs all over the surrounding area, and you can still see the straight lines where the rock was cut. It has since transitioned from a place of hard labour to a protected coastal landmark. In recent years, it gained international attention for hosting the Red Bull Cliff Diving World Series, where athletes jumped from heights of 27 metres into the deep water below.
Finding your way around The Blue Lagoon is easy, and you will find plenty of lovely places to stay nearby. Reaching this coastal spot is straightforward whether you are driving through the Pembrokeshire countryside or using local transport.
For the best experience, look for accommodation in the nearby city of St Davids, which is only 4 miles away. This area offers a great mix of cosy guest houses and family-friendly inns that put you close to local amenities. If you prefer a more rural feel, the small villages surrounding Abereiddy feature charming cottages and campsites that are perfect for those on a budget or travellers wanting to be right on the doorstep of the coast. These spots are peaceful and allow you to enjoy the rugged landscape of the Pembrokeshire Coast National Park without any distractions.
The most direct way to arrive is by car, following the narrow lanes to the dedicated car park located just 300 yards from the water. If you prefer public transport, the Celtic Coaster shuttle bus runs seasonally and stops at the Abereiddy bus stop, making it a simple trip from St Davids. For those who enjoy a walk, you can reach the site via the Pembrokeshire Coast Path, which offers a scenic route for hikers coming from nearby bays.
Ready to dip your toes into the emerald waters of The Blue Lagoon? You can easily find a place to stay in Abereiddy with eDreams. Look at hotels that suit your style and grab a great deal without any fuss. Whether you want a cosy spot near the cliffs or something further inland, the right hotel is just a few clicks away. Pick your favourite, pack your walking boots, and let eDreams help you get settled for your Welsh adventure.
