Wales offers an outstanding selection of wild swimming spots, from dreamy rivers and waterfalls to organised outdoor swim sessions in lakes and along its stunning coastline. This fast-growing activity, also known as open water swimming, involves taking a dip in natural bodies of water for cold-water therapy. However, it is essential to take precautions, even in hot weather, as cold water shock is a real danger that must be taken seriously.
Health Benefits of Wild Swimming
Beyond the scenic surroundings, the health and wellbeing benefits of cold-water plunges are believed to include an immune system boost, better sleep, improved stress response, and increased happiness. As long as you are a competent swimmer, swim with a buddy, and know your limits, this activity can enhance mindfulness and reduce stress. Preparation, practice, and planning are key. Consider attending organised events or controlled sessions if you are nervous, and always inform someone of your whereabouts.
Top Wild Swimming Locations
Lisvane and Llanishen Reservoir, Cardiff
With another heatwave approaching, a supervised swim in the Welsh capital is an ideal way to cool down. Built in the late 19th century, these Victorian reservoirs cover 110 acres of green and blue space, home to diverse flora and fauna. Redeveloped in 2023, the site now features an activity hub for open-water swimming, canoeing, paddleboarding, and sailing. For just £4, you can enjoy a supervised cold-water dip, offering a mental reset that rivals therapy. The reservoir is designated as an inland bathing water, with friendly guides ensuring safety for all.
Spring Valley Lakes, Neath
This 80-acre eco-friendly campsite and activity centre in the Glyn-Neath Valley is hugely underrated. It features two vast lakes set in a natural, wooded valley, reminiscent of a Swiss postcard. The spring-fed waters offer perfect clarity for swimming and water sports. On hot days, families can enjoy leisurely swims, while the site also offers glamping pods, camping, and various activities.
Watkin Path Waterfall, Eryri National Park
For experienced outdoor swimmers, the Watkin Path waterfall in Snowdonia National Park provides an icy dip in crystal-clear aqua-blue pools. This challenging route to the summit of Yr Wyddfa (Snowdon) offers stunning scenery and a welcome relief for tired limbs. Be thoroughly prepared with warm clothes, a flask of hot coffee, a micro towel, and suitable swim gear, especially in colder seasons.
Llandegfedd Lake, Monmouth
Ideal for beginners, this lake offers supervised open-water swimming sessions with lifeguard-trained staff. Accredited by the Swim Wales SAFE Cymru Scheme, participants must complete a compulsory induction for safety. Afterward, you can join regular dips and events, wearing either a wetsuit or a swimming skin. Allow extra time for navigation, as sat navs may lead astray, and arrive early to check in at the Water Sports Centre.
Henrhyd Falls, Bannau Brycheiniog
This impressive horseshoe waterfall features a cooling plunge pool, perfect for a bracing dip. Located in Graig Llech Gorge, it is the highest single-drop waterfall in south Wales and was a filming location for The Dark Knight Rises. Access requires a short hike through hedge-lined lanes and forest tracks. The pool depth varies, so wade carefully over slippery rocks. Swimming is tolerated as long as visitors behave responsibly and leave no trace.
Keepers Pond, Blaenavon
Originally built to power a 19th-century iron forge, this high-level lake is now part of the Blaenavon World Heritage Site. It is perfect for cooling dips with friends year-round. The mobile sauna Y Sawna occasionally appears lakeside for warming up after a swim. Combine swimming with hiking on the Iron Mountain Trail, which offers historical remnants of Welsh industry and panoramic views from Blorenge Mountain.
Penarth Pier, Vale of Glamorgan
Start your day with a sunrise dip at Penarth Seafront, where the iconic pier stretches into the Bristol Channel. The 'Dawnstalkers' community meets daily for a refreshing plunge. Afterward, look for Hot 2 Cold Sauna Co's pop-up barrel sauna for a steamy warm-up. Be mindful of powerful tides and always check conditions before entering the water.
Rhiwargor Waterfall, Lake Vyrnwy
Located in the RSPB reserve at the northern tip of Lake Vyrnwy, this 100-metre waterfall is the seventh-highest in Wales. A 1.5-mile easy walk leads to the falls, where staggered cascades create natural swimming pools. Enjoy the roar of the waterfall as you unwind in the glorious surroundings.
Llyn Padarn, Eryri
This glacially formed lake in Llanberis offers spectacular scenery with ancient woodlands, a historic castle, and slate quarries. A narrow-gauge railway can transport swimmers to the far end. The 'Big Swim events' feature routes across the lake, with distances up to 3km, accommodating both wetsuit and non-wetsuit entries.
Monk Nash Beach, Vale of Glamorgan
This secluded, rocky beach accessible only on foot features surreal rock formations and 300-million-year-old fossils. Best enjoyed at low tide, it offers a quiet spot for experienced dippers. There is no car park; park in a nearby field and walk along a tree-lined path. Wear sturdy shoes for the stroll.
Bala Lake, Southern Eryri
Wales' largest natural lake, over four miles long, boasts clear water and impressive mountain scenery. The Big Bala Swim, organised by Love Swim Run, offers three distance options for confident swimmers. Check their website for upcoming events.
Blue Lagoon, Pembrokeshire
This striking spot, once a slate quarry, features stunning aqua-blue water. Owned by the National Trust, it is popular for wild swimming and coasteering, having hosted the Red Bull Cliff Diving World Series. The water is very deep, so less confident swimmers should stay near the edge. After swimming, enjoy fish and chips at The Shed or a pint at the Sloop Inn.
Jackson's Bay, Vale of Glamorgan
This sandy cove backed by cliffs slopes gently into the sea but has submerged rocks and strong currents. All or Nothing Events offers supervised open-water swim events and triathlons, with fully qualified lifeguards and rescue crews. Check their website for details.
How to Prepare for Wild Swimming
Wild swimming can be challenging due to cold water and hazardous terrain. Swim Wales advises checking conditions, swimming at accredited facilities or lifeguarded beaches, having the right gear, never swimming alone, and if in trouble, 'floating to live'. Check weather and water temperature before setting out. For sea swimming, check tide times, especially in the Bristol Channel with its second-highest tidal range. Practice box breathing before entering the water to control your breath and avoid panic. When water reaches your shoulders, tread water for a minute or two; if cold water shock persists, exit carefully.
Essential Swim Gear
In summer, a rash vest and boardies help retain warmth. Consider a wetsuit, booties, gloves, and a swim hat for colder waters. A tow float increases visibility, and a changing robe provides warmth post-swim. For hot drinks, use a double-walled vacuum-insulated flask. In winter, pack a flask of coffee or hot soup to boost energy after your dip.
