Best lakes around Penarth include significant natural and historical attractions, such as Cosmeston Lakes Country Park, which features two large lakes formed from former limestone quarries. This park spans over 100 hectares, including lakes, reed beds, woodlands, and meadows, with a substantial portion designated as a Site of Special Scientific Interest. The area is known for its diverse ecosystems and historical connections, including the nearby site where Guglielmo Marconi received the first radio message transmitted across water. Penarth's landscape offers…
Last updated: May 2, 2026
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The Barrage connects Penarth to the Cardiff peninsula. It offers stunning views across the sea to one side, and the freshwater bay on the other. One of the highlights of the Cardiff Bay tour
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Every day, this narrow crossing offers a new perspective on life. It's a unique place where you feel enveloped in blue. Love it!
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Cardiff Bay Barrage is a significant engineering project located in Cardiff, Wales. Completed in 1999, the barrage was built to create a freshwater lake in Cardiff Bay by damming the River Taff and the River Ely. This project transformed the bay area, which was previously a tidal estuary, into a more controlled water environment. Key Features and Purpose: Tidal Control: The barrage helps manage tidal flows, preventing flooding and allowing for the creation of a stable freshwater environment. Recreation and Tourism: The area around the barrage has been developed for recreational use, including walking and cycling paths, boating, and various leisure activities. It has become a popular destination for both locals and tourists. Environmental Impact: The construction of the barrage altered the local ecosystem. While it created new habitats in the freshwater lake, it also raised concerns about the impact on marine life in the estuary. Hydropower Generation: The barrage includes a small power station that harnesses tidal energy, contributing to renewable energy production. Economic Development: The project played a crucial role in the regeneration of Cardiff Bay, leading to significant investment and development in the area, including residential, commercial, and cultural projects. The Cardiff Bay Barrage is often noted for its engineering complexity and its role in transforming the landscape and economy of Cardiff.
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Lisvane and Llanishen Reservoirs forms a vital part of the green and blue infrastructure of Cardiff. The mix of grassland, woodland, scrub and waterside habitats offers opportunities for all kinds of wildlife and nature. There are two Sites of Special Scientific Interest (SSSI) and much of the grassland and woodland outside of the SSSIs is designated as a Site of Importance for Nature Conservation (SINC). Dogs are permitted on the café balcony, car park and Grab & Go seating area only and are not permitted anywhere else on the site, including the paths. Natural Resources Wales has advised that the risk from dogs to the fungi is too great. Waxcaps are very sensitive to changes in habitat such as fluctuations in soil moisture, temperature and nitrate levels which can reduce the production of fruiting bodies. In particular, sudden changes to nitrate levels on the site – from dog urine specifically – can have a detrimental effect on the fungi. There is a fully accessible Visitor Centre with cafe, toilets, free wi-fi, room hire, equipment hire, changing rooms and other facilities include the boathouse, bird hide, education centre, nature trails and paths, bike parking/shelters and car parking.
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Enjoy a pretty stroll through the woodland surrounding Llanishen Reservoir. Well-maintained dirt paths will lead you around the forest where there is a rope swing and stream to discover, a little something for the kids to enjoy too.
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Roath Park is one of Cardiff's most loved parks, it was recently awarded the prestigious Green Flag award to recognise its high quality and its importance to Cardiff. In the centre of the park sits the wonderful Roath Lake, a peaceful place to walk around with sights of ducks, birds, and an impressive lighthouse stood in the water. There is a lovely little café and plenty of places to picnic, so take a seat and enjoy the view.
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The primary lakes to explore include the two large lakes within Cosmeston Lakes Country Park, formed from disused limestone quarries. Other notable spots are Cardiff Bay Barrage, which created a large freshwater lake, and Roath Park Lake, known for its peaceful atmosphere. Additionally, Rhydypenau Woods and Llanishen Reservoir offers a pleasant woodland experience.
Yes, Cosmeston Lakes Country Park is very family-friendly, offering lakeside walks, wildlife watching, and a play area. Roath Park Lake is also a popular choice with ducks to feed, picnic spots, and a café. Rhydypenau Woods and Llanishen Reservoir features well-maintained dirt paths and a rope swing, perfect for children.
Cosmeston Lakes Country Park is a designated Site of Special Scientific Interest (SSSI) and attracts diverse wildlife, including large flocks of waterfowl like mute swans and great crested grebes. You can also see damselflies, dragonflies, and various butterflies in summer, and nesting water birds in spring. Roath Park Lake is also home to many ducks and birds.
Yes, Cosmeston Lakes Country Park uniquely features the reconstructed Cosmeston Medieval Village. This archaeological site showcases 14th-century houses rebuilt on their original foundations, offering an immersive historical experience with costumed villagers. The area also has connections to Guglielmo Marconi's first radio message across water near Lavernock Point.
Around the lakes, you can enjoy various outdoor activities. Cosmeston Lakes offers windsurfing and sailing in some areas, along with parkrun events. For walking, running, and cycling, the area around Cardiff Bay Barrage and Cardiff Bay provides extensive paths. You can find numerous running routes, such as the Cardiff Bay Trail, and cycling routes, including those around Cardiff Bay, on the Running Trails around Penarth and Cycling around Penarth guides.
Cosmeston Lakes Country Park is designed to be accessible, with flat, even paths suitable for people of all abilities. Lisvane and Llanishen Reservoirs also features a fully accessible Visitor Centre and accessible paths around the site.
The lakes are open year-round. Spring (March-May) is ideal for seeing wildflowers and nesting birds. Summer (June-August) is best for observing abundant wildlife, including insects and orchids. Autumn (September-November) offers spectacular fall foliage and migratory bird sightings.
Cosmeston Lakes Country Park is generally dog-friendly, though specific rules may apply in certain areas. However, at Lisvane and Llanishen Reservoirs, dogs are only permitted on the café balcony, car park, and Grab & Go seating area, and are not allowed on the main paths due to the risk to sensitive fungi.
Yes, Cosmeston Lakes Country Park has a visitor center with displays and a café. Roath Park Lake also features a lovely little café. At Lisvane and Llanishen Reservoirs, there is a fully accessible Visitor Centre with a café, toilets, and other amenities.
Cosmeston Lakes Country Park allows activities like windsurfing and sailing in designated areas. For fishing, permits are typically required. It's advisable to check with the park authorities directly for current regulations and permit information regarding fishing and specific water sports.
Cosmeston Lakes Country Park offers flat and accessible paths perfect for easy walks. Roath Park Lake provides a peaceful and easy circuit. The paths around Rhydypenau Woods and Llanishen Reservoir are also well-maintained dirt paths suitable for a pleasant stroll.
Yes, Cosmeston Lakes Country Park has parking facilities available for visitors. There is also parking at Lisvane and Llanishen Reservoirs.


Still not found your perfect lake around Penarth? Check out the guides of these regions to see even more beautiful places.