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Eryri (Snowdonia) Mountains Winter Season 2025/26
September 2025 There was no snow observed in September. October A liitle wet snow fell on the 23rd and 25th on the highest summits. . November Snow had fallen overnight and on the morning of the 18th soft snow was lying thinly at 2000 ft with scattering at 1000ft. Further snow had fallen on the
Snow fell overnight on 29/30th and was lying at 1500 feet on the morning of the 30th, but most rather quickly disappeared with overnight rain leaving icy remnants 2250 ft and a few snow patches around 3000ft..
December Rapidly thawing snow was lying around the summits on the 1st leaving a few areas of snow, cornices on cliffs and small patches patches on the 2nd. On the 5th fresh snow had fallen again around the summits before quickly thawing with a little more seen on the 11th. One or two small patches had survived on Garnedd Ugain on the 12th. Thereafter there was no significant snow, but the air around the highest summits of the Carneddau and Yr Wyddfa from the 25th was very cold resulting in deposition of frost and rime enough to be seen from Llansadwrn. There was a sprinkling of fresh snow on the 30th . January 2026 Light snow fell on the mountains on the 1st and on the 2nd further moderate to heavy snow in showers had fallen and was lying as low as 350 ft at 0900 GMT. More snow showers on the 3rd and 4th led to moderate accumulations on high ground mainly in the west and on Anglesey. On the 5th snow had fallen at sea level again mainly in the west and on Anglesey resulting in further accumulations at higher levels. On the 6th with temperatures rising there was sleet and light rain from noon at lower levels and more snow at higher levels led to further accumulations. Little change in levels on the 7th with a little thawing taking place at low levfels. Snow was becoming unstable in some areas at higher levels with cornices in places. On the 8th snow was still lying above 2000 ft with 30% cover at 1750 ft with remnants at 1250 ft on the lower slopes of the Carneddau and at 300 ft on Anglesey. Llanberis Mountain Rescue Team warned of possible localised avalanches on Yr Wyddfa. ¤
NotesObservations are made as near to 0900 GMT as possible. I have a good view from Llansadwrn, weather permitting, across the Menai Strait towards the Snowdonia Mountains. I can see the northern slopes of the mountain range from Moel Eilio (west of Snowdon), Snowdon summits (Yr Wyddfa and Crib Goch), the Glyderau and Carneddau to Foel-fras and Drum to the east of the range near the Conwy Valley. With the aid of binoculars I make daily records that include any ice precipitation observed, the lowest altitude of snow lying at ( >= 50% cover), at ( >= 30% cover) and snow patches. I aim to update the diagram during the season at least twice weekly if there is any snow.
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 "Snow had fallen in Eryri on 19 November 2025")
 "Snow had fallen in Eryri on 19 November 2025")
 "Snow on carneddau Mountains in Eryri on 30 November 2025")
 "Snowdonia snowline current histogram.")
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