Lake Vyrnwy Lake
Wales reservoir with 19th-century masonry dam
A 19th-century reservoir in Wales, Vyrnwy is known for its Victorian stone dam, reservoir circuit walks, cycling routes and birdwatching at adjacent conservation areas.
Lake Vyrnwy at a Glance#
Address: Lake Vyrnwy Reservoir, near Llanwddyn, Powys/Wales (postal area: Llanwddyn)
Website: https://www.nationaltrust.org.uk/ (local site pages vary)
Hours: Reservoir and grounds open year‑round; visitor center hours variable seasonally
Admission: Free to visit reservoir shores; visitor center (if open) may charge for guided tours
How to Get to Lake Vyrnwy#
From Welshpool and the A483, follow local roads toward Llanwddyn and the B4395 access road to the reservoir. The site is best accessed by car; there are some local walk‑in paths and limited public transport to nearby villages. National Trust and local tourist information in Powys provide details on guided walks and visitor facilities.
Tips for Visiting Lake Vyrnwy#
- Drive the B4395 and approach via the village of Llanwddyn to see the drowned valley viewpoint and memorials to the lost village.
- Climb to the dam head in the morning for photographic light across the castellated turrets - the dam was built with ornate stonework that rewards a close look.
- Combine a visit with walks in the nearby Tanat and Vyrnwy valley trails to appreciate both engineered and natural landscapes.
Best Time to Visit Lake Vyrnwy#
Late spring through early autumn is the most pleasant time to visit for walking and photography; the site is accessible year‑round but can be wet and muddy in winter.
Weather & Climate near Lake Vyrnwy#
Lake Vyrnwy's climate is classified as Oceanic - Oceanic climate with cool summers (peaking in July) and cold winters (coldest in February). Temperatures range from 0°C to 18°C. Abundant rainfall (1523 mm/year), wettest in November.
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Poor | 0° - 5° | -2° | 164 mm | overcast | 94% | 5.6 m/s | 0.1 low | 8.1h |
| February | Poor | 0° - 5° | -2° | 120 mm | overcast | 93% | 5.6 m/s | 0.2 low | 9.7h |
| March | Poor | 1° - 7° | 0° | 136 mm | overcast | 90% | 5.1 m/s | 0.4 low | 11.7h |
| April | Acceptable | 2° - 9° | 2° | 95 mm | overcast | 86% | 4.3 m/s | 0.8 moderate | 13.8h |
| May | Acceptable | 4° - 13° | 6° | 85 mm | overcast | 84% | 4.2 m/s | 1.2 high | 15.5h |
| June | Good | 7° - 16° | 11° | 96 mm | overcast | 84% | 3.9 m/s | 1.4 high | 16.5h |
| July | Good | 9° - 18° | 14° | 91 mm | overcast | 85% | 3.8 m/s | 1.4 high | 16.0h |
| August | Good | 9° - 17° | 13° | 113 mm | overcast | 87% | 3.5 m/s | 1.1 high | 14.5h |
| September | Acceptable | 7° - 15° | 11° | 127 mm | overcast | 88% | 3.6 m/s | 0.7 moderate | 12.5h |
| October | Poor | 5° - 11° | 5° | 149 mm | overcast | 91% | 4.5 m/s | 0.3 low | 10.4h |
| November | Poor | 2° - 8° | 2° | 174 mm | overcast | 93% | 4.6 m/s | 0.1 low | 8.6h |
| December | Poor | 1° - 6° | -1° | 173 mm | overcast | 94% | 5.0 m/s | 0.0 low | 7.5h |