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Llyn Efyrnwy / Lake Vyrnwy - Photo 1
Photo: Awyrlun o Lyn Efyrnwy (Llyn Llanwddyn) - Aerial Image of Llyn Efyrnwy (lake Vyrnwy) in Novemebr 2022 08.jpg via Wikidata Q2248798 License

Llyn Efyrnwy / Lake Vyrnwy

Reservoir

Cool today

Lake Vyrnwy (Welsh: Llyn Efyrnwy, pronounced [ɛˈvərnʊɨ] or Llyn Llanwddyn) is a reservoir in Powys, Wales, built in the 1880s for Liverpool Corporation Waterworks to supply Liverpool with fresh water. It flooded the head of the Vyrnwy (Welsh: Afon Efyrnwy) valley and submerged the village of Llanwddyn. The Lake Vyrnwy Nature Reserve and Estate that surrounds the lake is jointly managed by the Royal Society for the Protection of Birds (RSPB) and Hafren Dyfrdwy and is a popular destination for ornithologists, cyclists and hikers.

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Weather at Llyn Efyrnwy / Lake Vyrnwy

H: 68° L: 44°
Mist
Mist
46°
|
Feels like 43°
Precipitation
6%
Humidity
95%
Wind
3 mph
UV Index
0
Water Conditions:
🥶Too cold for most swimmers
12 AM
Mist
47°
3 AM
Mist
45°
6 AM
Mist
44°
9 AM
Sunny
52°
12 PM
Sunny
62°
3 PM
Sunny
67°
6 PM
Sunny
66°
9 PM
Clear
53°

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Frequently asked questions

Where is Llyn Efyrnwy / Lake Vyrnwy?
Llyn Efyrnwy / Lake Vyrnwy is a reservoir in Wales.
Can you swim at Llyn Efyrnwy / Lake Vyrnwy?
There is no fixed answer for Llyn Efyrnwy / Lake Vyrnwy: whether it is safe to swim there on a given day depends on the water temperature, recent rainfall, and any advisories posted at Llyn Efyrnwy / Lake Vyrnwy in Wales. Check current water conditions before you go, and follow posted signs and local guidance.

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Best Times to Visit

🧥
Right Now
Cool weather - dress warmly
🏞️ Lakes 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
Best Seasons:
☀️ Summer (Jun-Aug)🍂 Fall (Sep-Nov)🌸 Spring (Mar-May)

Location & Contact

Wales

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Plan your visit

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