Updated

Llyn Celyn
Reservoir
Llyn Celyn (Welsh pronunciation: [ɬɨ̞n ˈkɛlɨ̞n]) is a reservoir constructed between 1960 and 1965 including the highly controversial Tryweryn flooding in the valley of the River Tryweryn in Gwynedd, Wales. This included the forcible removal of the Capel Celyn village residents despite protest and opposition of Welsh MPs. With an area of 320 hectares (1.2 sq mi), it measures roughly 2.5 miles (4.0 km) long by 1 mile (1.6 km) wide, and has a maximum depth of 140 ft (43 m).
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Weather at Llyn Celyn
45°F, Light rain · H 46° / L 38° · 91% chance of rain3-day forecast









Frequently asked questions
- Where is Llyn Celyn?
- Llyn Celyn is a reservoir in Wales.
- Can you swim at Llyn Celyn?
- There is no fixed answer for Llyn Celyn: whether it is safe to swim there on a given day depends on the water temperature, recent rainfall, and any advisories posted at Llyn Celyn in Wales. Check current water conditions before you go, and follow posted signs and local guidance.
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Location & Contact
Wales
🏞️ Best times & visiting tips
- ›Check for boat launch facilities and fees
- ›Obtain required fishing licenses before arrival
- ›Be aware of lake-specific regulations and restrictions
- ›Monitor water quality reports before swimming
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