The name Craig Fach comes from Welsh: "craig" (crag/rock) + "fach" (small) — roughly "crag of the small".
At 609m (1997ft), Craig Fach is the 6th highest Dewey, one of 425 Deweys in total. Check today's Craig Fach 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 Bedded Pyroclastic Formation — Pyroclastic-rock — rock formed from explosive volcanic eruptions. Age: Caradoc Series.
Planning to walk Craig Fach? Our summit weather forecast shows live conditions at 609m 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 Craig Fach: 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 609m), and wind gusts (which can be significantly stronger on exposed summits than in the valley below).
Craig Fach weather can change quickly at 609m. 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 Craig Fach.
Frequently Asked Questions
How high is Craig Fach?
Craig Fach is 609 metres (1997 feet) above sea level. It is classified as a Dewey in Wales.
What is the weather like on Craig Fach?
At 609m, conditions on Craig Fach 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 Craig Fach a difficult walk?
Craig Fach at 609m 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.
What is a Dewey?
A Dewey is a hill in England, Wales, or the Isle of Man between 500 and 609.6 metres with a drop of at least 30 metres on all sides. There are 425 Deweys, named after Michael Dewey. They fill the gap between the lower hills and the 2,000ft Hewitt threshold.
When is the best time to climb Craig Fach?
The best months for climbing Craig Fach 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.
Free summit weather forecasts for over 20,000 British and Irish hills. Designed for hikers, runners, and climbers who need accurate mountain conditions — not just city weather.
