Escape to the serene Llanishen Reservoir, a tranquil oasis in Cardiff, Wales, boasting a picturesque shoreline and Excellent water quality, as certified by Natural Resources Wales. During the summer months, the water temperature typically ranges from 15°C to 18°C, perfect for a refreshing swim or paddle. Surrounded by lush greenery, this inland lake offers a peaceful retreat from the hustle and bustle of city life.
Hand-picked holiday cottages & coastal retreats near Llanishen Reservoir (Cardiff) & surrounds
Rural Retreats
From £596
In association with Trinity House, we are pleased to present Stella at Nash Point Lighthouse. One of two former lighthouse keeper's cottages available on the Glamorgan Heritage ...
Rural Retreats
From £468
Nos Da (Welsh for “good night”) is a beautifully presented contemporary cottage offering the ideal tranquil escape in South Wales’ beautiful countryside and nearby coastline mak...
Rural Retreats
From £724
Rexton House is light and spacious property, tucked away in the beautiful seaside town of Llanwit Major. This comfortable property is the perfect base to explore the local area ...
Rural Retreats
From £755
In association with Trinity House, we are pleased to present Ariel at Nash Point Lighthouse. One of two former lighthouse keeper's cottages available on the Glamorgan Heritage C...
Rural Retreats
From £448
Nos Da (Welsh for “good night”) is a beautifully presented contemporary cottage offering the ideal tranquil escape in South Wales’ beautiful countryside and nearby coastline mak...
Rural Retreats
From £763
In association with Trinity House, we are pleased to present Stella at Nash Point Lighthouse. One of two former lighthouse keeper's cottages available on the Glamorgan Heritage ...
Rural Retreats
From £385
The Cwtch provides you with the peace and tranquillity of the countryside, with close proximity to a beautiful coastline and the many attractions that South Wales has to offer i...
Rural Retreats
From £756
Rexton House is light and spacious property, tucked away in the beautiful seaside town of Llanwit Major. This comfortable property is the perfect base to explore the local area ...
Sediment type has not yet been recorded for this site. Underfoot conditions and bank composition may vary.
Water quality is classified as excellent, meeting the highest cleanliness standards. Bacterial counts (E. coli & Intestinal Enterococci) are consistently low, posing negligible health risks.
Bacterial levels are highly susceptible to storm runoff. Heavy rainfall in the local catchment is likely to trigger storm overflows and agricultural runoff, rendering the water temporarily unsafe.
Tested weekly by the Environment Agency England for bacteria levels (E. coli & Intestinal Enterococci) between May and September.
Monitored as an inland lake bathing water. Inland lakes and reservoirs have low water circulation compared to tidal waters, meaning bacterial levels can persist longer after rainfall.
Unknown is the regional utility responsible for waste water treatment, sewage infrastructure, and storm overflow management in this catchment area.
Officially designated as a protected bathing water site in 2025. This designation mandates regular public health monitoring.
Governed under local district sanitation and environmental safety regulations in the Cardiff area.
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