Eryri (Snowdonia) cloud inversion forecast
Steep-sided valleys and lakes in Eryri trap cloud below the summits of Yr Wyddfa, the Glyderau and Moel Siabod.
Cloud and fog settle in the Llanberis Pass, Nant Gwynant, the Ogwen valley and the Conwy valley on calm, cold nights. Above the lid, the high summits stand clear in bright sunshine.
Moel Siabod is a favourite for watching cloud fill the valleys around Capel Curig. Yr Wyddfa and the Glyderau are high enough to sit above most inversions.
The forecast below is for the valleys around Llanberis. Pick a viewpoint to see whether its summit is likely to be above the cloud.
Viewpoints to try
| Viewpoint | Height |
|---|---|
| CnichtPointed summit above Croesor and the Glaslyn estuary | 689 m |
| Moel SiabodViews over Capel Curig and the Ogwen and Lledr valleys | 872 m |
| Cadair IdrisSouthern Eryri, above Dolgellau and the Mawddach | 893 m |
| TryfanScrambly summit above the Ogwen valley | 917 m |
| Glyder FawrAbove the Llanberis Pass and Llyn Ogwen | 1,001 m |
| Yr Wyddfa (Snowdon)Highest summit in Wales | 1,085 m |
Loading the forecast for Llanberis…
Other cloud inversion forecasts
- Lake DistrictDeep glacial valleys and big lakes make the Lake District one of the best places in Britain to look down on a sea of cloud.
- Peak DistrictThe Hope Valley is famous for filling with cloud on calm, cold mornings, watched from Mam Tor and Win Hill.
- Scottish HighlandsFrom Ben Nevis to Loch Lomond and Perthshire, Highland glens and sea lochs fill with cloud under winter high pressure.
- Bannau Brycheiniog (Brecon Beacons)The Usk valley fills with fog on calm mornings, seen from Pen y Fan, the Sugar Loaf and the Skirrid.
- Yorkshire DalesRibblesdale and the Three Peaks are a fine place to watch cloud fill the dales below limestone summits.