Blue Lagoon, Abereiddi
A flooded slate quarry turned wild swimming lagoon on the Pembrokeshire coast, surrounded by cliffs, ruins and dramatic coastal scenery.
Tucked into the rugged Pembrokeshire coastline, the Blue Lagoon is a dramatic flooded slate quarry with deep turquoise waters framed by sheer cliffs. Once a working slate quarry, it’s now a striking natural pool popular with swimmers, coasteerers and photographers. The lagoon is surrounded by atmospheric ruins and offers a wild, adventurous feel, with access via a short walk from Abereiddi Beach. It’s a highlight of the Pembrokeshire Coast Path and a unique example of industrial heritage transformed into a coastal gem.
A brief summary to Blue Lagoon - Abereiddi
- Abereiddi: SA62 6DT, Abermawr:, SA62 5UX, GB
- +441437720385
- Visit website
- Duration: 1 to 3 hours
- Budget
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Outdoor
- Mobile reception: 3 out of 5
- Monday 12 am-12 am
- Tuesday 12 am-12 am
- Wednesday 12 am-12 am
- Thursday 12 am-12 am
- Friday 12 am-12 am
- Saturday 12 am-12 am
- Sunday 12 am-12 am
Local tips
- Visit outside peak summer hours or on weekdays to avoid crowds; the lagoon is most atmospheric in the early morning or late afternoon light.
- Wear sturdy shoes or sea boots – the path is uneven and the rocks around the lagoon can be slippery and sharp.
- Check the National Trust website before visiting in autumn, as the lagoon closes for several weeks each year to protect breeding seals.
- Only swim if you are a confident swimmer; the water is deep and cold, and there are no lifeguards on duty.
- Bring a waterproof jacket and layers; the exposed coast can be windy and changeable, even on sunny days.
For the on-the-go comforts that matter to you
- Restrooms
- Drinking Water
- Seating Areas
- Sheltered Areas
- Trash Bins
- Information Boards
Getting There
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Car
From St Davids, follow the A487 northeast for about 8 km to the Abereiddi turn-off. A short, narrow lane leads down to the informal beach car park above Abereiddi Beach. Parking is limited and charges a small fee; arrive early on sunny days to secure a spot.
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Walking
The Blue Lagoon is accessible via the Wales Coast Path from nearby villages like Porthgain or Abercastle. From Porthgain, allow about 45–60 minutes along the coastal path; from Abercastle, it’s roughly 30–40 minutes. The final approach is a well-marked but uneven path down to the lagoon.
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Public Transport
The nearest regular bus stop is in St Davids; from there, a taxi or a 6–7 km walk along country roads and the coast path is needed to reach Abereiddi. A seasonal local shuttle sometimes serves the area in summer, but services are infrequent and not wheelchair accessible.
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Cycling
Cyclists can reach Abereiddi via quiet country lanes from St Davids or Porthgain. The final descent to the beach is steep and narrow, so dismounting and walking the last section is advisable. Secure bike parking is informal and at your own risk.
Blue Lagoon - Abereiddi location weather suitability
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Any Weather
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Clear Skies
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Windy Conditions
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Mild Temperatures
Discover more about Blue Lagoon - Abereiddi
A dramatic flooded quarry
Nestled along the wild north Pembrokeshire coast, the Blue Lagoon is a deep, vividly coloured pool formed in the flooded remains of the old St Brides slate quarry. In the 19th century, slate was quarried here and transported by tramway to Porthgain Harbour. When the quarry closed around 1910, local fishermen blasted through the seaward wall to create a sheltered harbour, allowing the sea to flood the workings and creating the lagoon we see today. The water’s striking blue-green hue comes from the surrounding dark slate and the way sunlight reflects off the flooded quarry floor.Wild swimming and coastal adventure
The Blue Lagoon is now a popular spot for wild swimming, kayaking and coasteering, drawing adventurers and water sports enthusiasts from across the region. The pool is deep – reaching around 25 metres in places – and the water is cold, so it’s best suited to confident swimmers. Coasteering here is particularly dramatic, with jumps and traverses along the cliff faces, but it’s strongly recommended to go with a qualified guide. The lagoon is also a training ground for divers and has hosted international cliff diving events, adding to its reputation as a place of both natural beauty and adrenaline.Industrial ruins and coastal views
Around the lagoon, the remains of the slate quarry are still visible: ruined buildings, tramway traces and abandoned workers’ cottages scattered along the clifftop. These remnants give the site a haunting, industrial charm and connect it to Pembrokeshire’s rich slate-mining history. From the viewing platform and surrounding paths, there are excellent views down into the lagoon and out across the rugged coastline. The area is part of the Pembrokeshire Coast National Park and the Wales Coast Path, making it easy to combine a visit with a longer coastal walk.Seasonal access and wildlife
The Blue Lagoon is managed by the National Trust and is generally open year-round, but it closes for several weeks each autumn to protect breeding seals on nearby Traeth Llyfn beach. During this period, visitors are asked to keep dogs on short leads and maintain a respectful distance from seals. Outside of the closure, the lagoon is accessible at all tide states, though the surrounding paths can be slippery and uneven. The site is popular in summer, so arriving early helps avoid the busiest times and makes parking easier.Getting there and practical tips
Access is via a short, well-defined path from the Abereiddi Beach car park, which is a short drive from St Davids. The path is mostly compacted stone and concrete, with some steeper sections and loose slate underfoot, so sturdy footwear is recommended. The car park is small and charges a modest fee, so it can fill up on sunny days. Facilities are limited on site, but toilets and basic services are available in nearby Porthgain and Abercastle. Because of the exposed cliffs and deep water, supervision is essential for children, and swimming should only be attempted by strong swimmers aware of the conditions.Iconic landmarks you can’t miss
St Davids Cathedral
7.4 km
Discover the ancient spiritual heart of Wales in St Davids Cathedral, a majestic site of pilgrimage and architectural wonder nestled in Pembrokeshire’s scenic valley.
Stack Rock Fort
27.4 km
A formidable 19th-century island fortress guarding Wales’ Milford Haven, blending military history with rugged coastal beauty.
Tŷ Milford Waterfront
27.6 km
Modern nautical charm meets stunning marina views at Tŷ Milford Waterfront, a stylish family-friendly hotel in scenic Milford Haven.
West Blockhouse Fort
28.0 km
A commanding 19th-century coastal fort perched on Pembrokeshire cliffs, blending rich military history with stunning sea views and heritage charm.
Castell Henllys Iron Age Village
33.0 km
Explore the enchanting Castell Henllys Iron Age Village, where history, culture, and nature unite for an unforgettable experience in Pembrokeshire.
Oakwood Theme Park
33.3 km
Experience the thrill of Oakwood Theme Park, where adventure meets family fun in the heart of Wales.
Upton Castle Gardens
35.0 km
Explore Upton Castle Gardens, a breathtaking blend of nature, art, and history in Cosheston, Pembroke Dock, offering a tranquil escape for every visitor.
Pembroke Castle
35.2 km
Explore Pembroke Castle, a breathtaking historical landmark in Wales, rich in medieval architecture and fascinating history.
William Marshal Statue
35.2 km
Medieval England's greatest knight, immortalized in bronze below his castle stronghold.
Monkton Old Hall
35.2 km
Explore the historical charm of Monkton Old Hall, a serene landmark in Pembroke, perfect for history enthusiasts and peaceful retreats.
Foel Drygarn Hill Fort
36.2 km
Discover the ancient history and stunning vistas at Foel Drygarn Hill Fort, a captivating landmark in Pembrokeshire, Wales.
Carew Tidal Mill
37.0 km
Experience the rich history and stunning scenery of Carew Tidal Mill, a historic treasure in Pembrokeshire's beautiful landscape.
Carew Castle & Tidal Mill
37.3 km
Explore Carew Castle & Tidal Mill, a historical marvel blending medieval architecture with breathtaking natural beauty in Pembrokeshire.
Carew Cross
37.4 km
An exquisite 11th-century Celtic cross memorializing Welsh royalty, showcasing intricate stone carvings and deep historical roots near Carew Castle.
Llys yr Esgob Llandyfái / Lamphey Bishops Palace
37.8 km
Explore the enchanting ruins of Lamphey Bishops Palace, a historical landmark nestled in Pembrokeshire, rich in history and breathtaking architecture.
Unmissable attractions to see
Abereiddi Tower
0.2 km
Discover Abereiddi Tower, a mysterious coastal lookout surrounded by Pembrokeshire’s rugged cliffs, slate quarry ruins, and breathtaking sea views.
Celtic Quest Coasteering
0.3 km
Experience thrilling coasteering adventures exploring Pembrokeshire’s rugged coastline with expert guides and full safety gear.
Solva Woollen Mill
5.6 km
Discover traditional Welsh wool weaving and heritage craftsmanship at Solva Woollen Mill, nestled in scenic Pembrokeshire.
Carreg Samson
5.7 km
Explore Carreg Samson, a monumental 5,000-year-old Neolithic dolmen perched on the Pembrokeshire coast, steeped in legend and prehistoric wonder.
Oriel y Parc Gallery & Visitor Centre
7.3 km
Discover art, nature, and local culture at Oriel y Parc, the vibrant gateway to Pembrokeshire Coast National Park in St Davids.
Solva Lime Kilns
7.4 km
Historic 19th-century lime kilns set against Pembrokeshire’s rugged coast, blending industrial heritage with breathtaking natural beauty.
Llys yr Esgob, Tyddewi / St Davids Bishop's Palace
7.5 km
Explore the majestic ruins of St Davids Bishop's Palace, a medieval Welsh landmark steeped in history and scenic charm beside the River Alun.
Whitesands Bay
7.6 km
A breathtaking Pembrokeshire beach with golden sands, thrilling surf, and stunning views crowned by the majestic Carn Llidi headland.
Wild About Pembrokeshire!
7.6 km
Explore the natural beauty and rich culture of Pembrokeshire with Wild About Pembrokeshire, your gateway to unforgettable adventures in nature.
St David's Head - National Trust
8.0 km
Dramatic cliffs, ancient dolmens and sweeping sea views on the wild Pembrokeshire headland where the Irish and Celtic Seas meet.
St Non's Chapel and Well
8.3 km
Discover the ancient birthplace of St David with sacred ruins, a healing holy well, and a serene chapel on the Pembrokeshire coast.
Porthmynawyd beach
9.1 km
Secluded sand and pebble beach on the Pembrokeshire Coast Path, perfect for peaceful walks and year-round dog-friendly exploration.
Porthclais Harbour Authority
9.2 km
A historic 12th-century harbour on Pembrokeshire’s coast, perfect for kayaking, coastal walks, and soaking in scenic Welsh maritime heritage.
Pembrokeshire Coast Path
9.2 km
Explore 186 miles of breathtaking Welsh coastline, from rugged cliffs to golden beaches, along the iconic Pembrokeshire Coast Path.
Abermawr
9.3 km
Discover the tranquil, shingle-strewn shores of Abermawr, a secluded coastal gem framed by woodlands and marshes in Pembrokeshire.
Essential places to dine
The Shed Fish & Chip Bistro
2.2 km
Fresh, locally caught seafood served in a charming harbour-side bistro in the heart of Porthgain village.
The Cambrian Inn
7.1 km
A charming coastal inn in Solva offering cozy rooms, local cuisine, and a warm Welsh welcome near Pembrokeshire’s scenic shores.
The Hats and Barrels
7.1 km
A stylish riverside bistro in Solva offering British classics, vegan options, and a warm, welcoming atmosphere in Pembrokeshire’s scenic harbour village.
Twr y Felin Hotel
7.4 km
A stylish coastal retreat blending contemporary art, luxury comfort, and Welsh heritage in the heart of St Davids.
The Really Wild Emporium
7.4 km
Discover wild flavours, sustainable living, and unique local crafts at The Really Wild Emporium in St Davids’ historic heart.
Blas Restaurant
7.4 km
A boutique dining gem in St Davids blending innovative Welsh cuisine with contemporary art in a historic windmill setting.
The Druidstone Hotel
16.1 km
Eclectic bohemian hotel near Pembrokeshire’s coast, offering creative cuisine, cozy rooms, and stunning seaside views in a relaxed, pet-friendly setting.
The Wolfe Inn Wolfscastle
17.0 km
A welcoming country inn where Welsh hospitality meets modern comfort in rural Pembrokeshire.
The Ocean Cafe Bar & Restaurant
18.9 km
Seaside dining with fresh seafood, hearty breakfasts, and stunning views over Broad Haven’s St Brides Bay.
Sand & Stone Kitchen
19.0 km
Cozy seaside kitchen serving top-notch breakfast, burgers, and vegan delights in Broad Haven’s charming coastal village.
The Rising Sun Inn
19.9 km
Charming countryside pub and restaurant in Pelcomb Bridge offering hearty meals, warm hospitality, and a welcoming caravan park in scenic Pembrokeshire.
The George's
22.4 km
A unique all-day dining and shopping experience in the heart of historic Haverfordwest with a tranquil walled garden retreat.
SEED Restaurant & Coffee Shop
22.5 km
Experience fresh, expertly crafted meals by hospitality students in a welcoming college restaurant with seasonal menus and themed evenings.
The Lobster Pot Inn
23.0 km
Cozy coastal inn in Marloes offering fresh seafood, simple comfort, and easy access to Pembrokeshire’s scenic coastal paths.
The Griffin
25.8 km
A beloved Pembrokeshire seafood gastropub offering fresh local fish, warm hospitality, and stunning seafront views in the village of Dale.
Markets, malls and hidden boutiques
Window On Wales Ltd
7.1 km
Discover unique Welsh gifts, stylish men’s clothing, and charming homeware in the heart of Solva at Window On Wales Ltd.
Seaforth Home
7.2 km
Discover handcrafted Welsh homewares inspired by Pembrokeshire’s rugged coast at Seaforth Home in Solva.
Basalt & Dune
7.3 km
Discover unique artisan gifts and local art in the heart of St Davids at Basalt & Dune, a boutique gallery and shop celebrating Welsh creativity.
Interesting Things
7.4 km
Explore St Davids' charm through unique gifts and handcrafted crafts at Interesting Things, a must-visit shop for every tourist.
Window on Wales
7.4 km
Discover authentic Welsh crafts and gifts in a charming historic setting at Window on Wales, St Davids’ beloved artisan shop.
Offshore Surf Shed
9.6 km
A warm local surf shop in historic Penycwm offering quality gear and coastal lifestyle essentials in the heart of Pembrokeshire.
Nolton Cross Farm Shop
16.3 km
Authentic Pembrokeshire farm shop offering local Welsh produce, grass-fed beef, and traditional Welshcakes in a serene rural setting.
Pembrokeshire Creations & Beyond
17.0 km
Discover authentic Pembrokeshire crafts and unique gifts in a welcoming Fishguard boutique celebrating local artistry and heritage.
Haven Sports Ltd
19.0 km
Your trusted Broad Haven surf shop offering quality water sports gear and expert local advice for all ages and skill levels.
The Beach Shop
19.0 km
A charming coastal gift shop in Broad Haven offering beach essentials and souvenirs near the scenic Pembrokeshire coastline.
Vincent Davies
21.1 km
A versatile department store in Haverfordwest blending home goods, garden supplies, dining, and friendly service under one welcoming roof.
Springfield Retail Park
21.7 km
A vibrant shopping and dining hub in Haverfordwest offering diverse stores, ample parking, and a lively atmosphere for locals and visitors alike.
Next
21.9 km
A family-friendly fashion hub in Haverfordwest offering stylish clothing, shoes, and accessories for all ages at moderate prices.
Withybush Retail Park
21.9 km
A modern retail park in Haverfordwest offering diverse shopping, dining, and free parking for a convenient and lively local experience.
Mountain Warehouse Haverfordwest
21.9 km
Your essential outdoor gear destination for Pembrokeshire adventures and Welsh wilderness exploration.
Essential bars & hidden hideouts
Sloop Inn
2.3 km
Historic coastal pub in Porthgain offering warm hospitality, fresh local seafood, and a rich maritime atmosphere.
Artramont Arms
3.6 km
A welcoming Welsh country pub serving hearty meals and good beer in the peaceful village of Croesgoch near Haverfordwest.
The Ship Inn
4.4 km
Historic coastal pub in Pembrokeshire blending rustic charm with modern dining and a welcoming garden.
Square & Compass Inn
5.2 km
A welcoming Welsh country pub near Haverfordwest offering hearty food, friendly locals, and scenic Pembrokeshire views.
The Ship Solva
7.1 km
Charming family-run pub in Solva offering craft beers, fresh Welsh cuisine, and a cozy atmosphere near scenic Solva Harbour.
Harbour Inn
7.2 km
A welcoming coastal pub in Solva offering hearty meals, scenic harbour views, and friendly hospitality along the Pembrokeshire Coast Path.
The Farmers Arms
8.4 km
Traditional Welsh pub in scenic Mathry offering hearty meals, real ales, and warm Pembrokeshire hospitality daily from noon to 11pm.
Royal Oak
17.1 km
Historic Fishguard pub and restaurant offering local ales and hearty fare in the scenic Pembrokeshire Coast National Park.
The Pelcomb Inn
18.3 km
A warm, traditional Welsh pub offering hearty meals, friendly service, and cozy accommodation near Haverfordwest.
The Corner Piece Inn
18.8 km
Cozy dog-friendly pub in Rudbaxton serving hearty home-cooked meals and renowned Sunday roasts with warm, attentive hospitality.
The Galleon Inn
19.0 km
A family-run coastal pub in Broad Haven offering hearty food, excellent beer, and a warm, lively atmosphere by the sea.
The Castle
19.5 km
A charming seaside pub in Little Haven offering hearty meals, stunning sea views, and warm, attentive service in a cozy setting.
St. Brides Inn
19.6 km
Cozy seaside pub in Little Haven serving fresh local seafood, Welsh meats, and warm hospitality in a charming coastal setting.
Lost Coins
21.4 km
A cozy, family-friendly pub in historic Haverfordwest serving quality pub classics, real ales, and vegan options with a warm atmosphere.
Friars Vaults
22.4 km
Historic and welcoming pub in Haverfordwest serving hearty British fare with great value and a lively local atmosphere.
Nightclubs & after hour spots
Eddie Rocks
22.4 km
A vibrant multi-floor nightclub in Haverfordwest offering energetic nights, diverse music, and a welcoming atmosphere by the waterfront.
The Basement
27.6 km
Discover the energetic nightlife of Milford Haven at The Basement, where music, dancing, and vibrant gatherings create unforgettable experiences.
Boulevard Show Bar
27.6 km
Experience vibrant cabaret, live shows, and lively nightlife at Boulevard Show Bar, Milford Haven’s premier entertainment venue.
Paddles
35.4 km
Experience Pembroke’s vibrant nightlife at Paddles, the go-to nightclub for late-night music, drinks, and social energy in the town center.
Comlongon
41.9 km
Experience vibrant nightlife in the charming village of St Florence with Comlongon, Tenby’s energetic nightclub gem.
Sands Nightclub
43.1 km
Saundersfoot’s lively nightclub with dance, drinks, and a vibrant atmosphere near the beach.
Prince Of Wales
45.7 km
Tenby’s iconic late-night nightclub blending lively music, classic charm, and a spirited atmosphere in the heart of Town Wall Arcade.
Hazewell Club
45.9 km
Discover the Hazewell Club in Tenby: a cozy sports club offering a warm atmosphere and local drinks amidst stunning coastal views.
Savannah's Night Club
62.2 km
Experience Carmarthen’s vibrant nightlife at Savannah's Night Club—where music, dance, and stylish vibes create unforgettable Saturday nights.
The Gremlin Club
62.5 km
Vibrant nightlife and lively open mic nights in the heart of Carmarthen’s social scene.
Club Mambo
62.6 km
Discover the energetic vibe of Club Mambo, a lively bar in Carmarthen offering delicious drinks and an unforgettable nightlife experience.
Lucifer's Nightlife
62.7 km
Experience Carmarthen's vibrant nightlife and fast food fusion at Lucifer's Nightlife, where music, dancing, and late-night bites come alive on Queen Street.
The Rainbow Rooms Bar & Club
86.1 km
Experience lively nights and vibrant music at The Rainbow Rooms Bar & Club, Gorseinon’s premier destination for unforgettable nightlife.
Yokoswnb
93.1 km
A vibrant, budget-friendly nightclub and bar in Aberystwyth, popular with students for its lively atmosphere and central location.
Pier Pressure
93.1 km
Experience Aberystwyth’s vibrant nightlife at Pier Pressure, a lively nightclub set on the historic Royal Pier by scenic Cardigan Bay.
For the vibe & atmosphere seeker
- Adventurous
- Scenic
- Unique
- Tranquil
For the design and aesthetic lover
- Rustic Designs
- Industrial Designs
For the architecture buff
- Historic
- Landmarks
- Parks & Gardens
- Heritage Neighborhoods
For the view chaser and sunset hunter
- Iconic Views
- Panoramas
- Waterfront
For the social media creator & influencer
- Instagrammable
- Photo Spots
- Selfie Spots
- Aesthetic Corners
- Architectural Shots
For the eco-conscious traveler
- Protected Area
- Public-Transport Accessible
- Leave-No-Trace Critical
- Wildlife Habitat
For the kind of experience you’re after
- Cultural Heritage
- Photowalk
- Adventure Photo Shoot
- Nature Escape
- Day Trip
For how adventurous you want the journey to be
- Easy Access
- Requires Hike
Location Audience
- Family Friendly
- Teen Friendly
- Child Friendly
- Solo Friendly
- Couple Friendly
- Pet Friendly
- Vegetarian Friendly
- Vegan Friendly
