Gwaun Cerrig Llwydion is a 730m (2395ft) Wales hill classified as a Nuttall (Deleted), one of 60 Nuttall (Deleted)s in Wales. Check today's Gwaun Cerrig Llwydion summit weather including wind speed, temperature, rain risk and cloud cover before heading out. Weather on the Welsh hills can change quickly at this altitude.
Geology: The bedrock here is Pen Y Fan Formation — Sandstone — a sedimentary rock formed from compressed sand grains. Age: Frasnian Age.
Planning to walk Gwaun Cerrig Llwydion? Our summit weather forecast shows live conditions at 730m including wind speed, wind chill, temperature, freezing level, cloud base and rain risk. The forecast updates hourly using data from 7 weather models blended into the HILLANDGLEN ensemble — accuracy-weighted so the best-performing models have the most influence.
Key conditions to check before climbing Gwaun Cerrig Llwydion: wind chill (the real temperature you'll feel on exposed ridges), freezing level (whether ice and snow are likely on the summit), cloud base (whether you'll have visibility at 730m), and wind gusts (which can be significantly stronger on exposed summits than in the valley below).
Gwaun Cerrig Llwydion weather can change quickly at 730m. Valley conditions often differ from the summit — our forecast applies lapse rate adjustments to give you the actual temperature and wind at the top, not the nearest town. Check the 14-day outlook to find the best day to walk Gwaun Cerrig Llwydion.
Frequently Asked Questions
How high is Gwaun Cerrig Llwydion?
Gwaun Cerrig Llwydion is 730 metres (2395 feet) above sea level. It is classified as a Nuttall (Deleted) in Wales.
What is the weather like on Gwaun Cerrig Llwydion?
At 730m, conditions on Gwaun Cerrig Llwydion are noticeably different from the valley floor. Expect temperatures 4-6°C colder at the summit, stronger winds on exposed sections, and cloud that can sit on the tops. Check the live summit forecast on hillandglen.com for wind chill, rain risk and visibility before your walk.
Is Gwaun Cerrig Llwydion a difficult walk?
Gwaun Cerrig Llwydion at 730m is a hill walk requiring reasonable fitness. The main challenges are weather-related: wind, rain and poor visibility can make navigation harder. Check the summit forecast before setting out and carry waterproofs, warm layers and a map.
When is the best time to climb Gwaun Cerrig Llwydion?
The best months for climbing Gwaun Cerrig Llwydion are typically May to September, when days are longest and weather is generally drier. Summer offers the most stable conditions and longest daylight hours. Autumn can also be excellent with clearer skies and golden light.
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