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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Regional Report weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
The live forecast above shows conditions for Penygadair, Cadair Idris’s summit, but expect significantly cooler, windier and wetter weather than at the base—mountain weather changes rapidly and can be dangerous even when the valley looks fine.
What is the weather like on Cadair Idris today?
Mountain weather on Cadair Idris is notoriously fickle. The summit often sits in cloud while the lower slopes are clear, and temperatures can drop 5–10°C from the car park at Minffordd to the top. Check the live forecast above for the latest wind speed and visibility; if it shows low cloud or strong gusts, consider postponing your ascent.
- Summit temperatures are typically 5–8°C colder than at sea level.
- Wind speeds can double or triple on the exposed ridge, making walking hazardous.
- Rain or hill fog can reduce visibility to under 20 metres within minutes.
- For cadair idris weather tomorrow, always re-check the live forecast before setting out.
Is there snow on Cadair Idris today?
Snow can linger on the summit into late spring and return as early as October. To check is there snow on cadair idris today, look at the live forecast above for precipitation type and the webcams linked in the cadair idris weather bbc mountain forecast. Even a dusting on the path can make the steep sections treacherous without crampons and an ice axe.
- Snow patches often persist in shaded gullies until May.
- Winter conditions can arrive suddenly from November onward.
- The cadair idris weather met office mountain forecast includes a specific snow-line prediction.
What should walkers know before heading up?
Navigation is the biggest challenge on Cadair Idris. The summit is a broad plateau with several cairns, and in cloud it is easy to walk off a cliff. Always carry a map, compass and a fully charged phone, and check the live forecast above for wind speed—if it exceeds 40 mph, the ridge becomes genuinely dangerous.
- Parking at Minffordd or Ty Nant fills early on summer weekends.
- Allow 5–7 hours for the full circular route via the Pony Path and Fox’s Path.
- For cadair idris weather tomorrow, the Met Office’s 5-day mountain outlook is more reliable than a standard valley forecast.
Can I rely on a valley forecast for Cadair Idris?
No. Valley forecasts from Dolgellau or Machynlleth can be 5–10°C warmer and miss hill fog entirely. Always use a dedicated mountain forecast from the Met Office or the live forecast above.
Is Cadair Idris dangerous in winter?
Yes. Snow, ice and strong winds create serious avalanche risk on steep slopes and make the Fox’s Path a Grade 1 scramble. Only attempt it with winter gear and experience.
Where can I find the most reliable mountain forecast?
The Met Office’s Snowdonia mountain forecast is updated twice daily. The cadair idris weather bbc page also carries a dedicated mountain summary. Always cross-check with the live forecast above.
Sources
For conditions across the UK, visit our UK weather hub. For other mountainous regions, see Glasgow Weather or 10 Day Weather Forecast UK.