Snowdon - Yr Wyddfa1,085 m
55Mixed
A mixed day on Snowdon - Yr Wyddfa, with cloud on the tops early.
Wind26 mph SEGusts 34 mph
Rain0.0 mm
Summit views49%
Welsh 3000s weather forecast
Compare all 15 summits over 3,000 feet in Eryri before committing to this long and serious mountain challenge.
15 summitsAcross three mountain ranges
Forecast comparison
Every summit is shown side by side. The combined grade gives extra weight to the weakest forecast.
SummitGradeForecast summaryWindRainSummit viewsDetails
Crib y Ddysgl (Garnedd Ugain)1,065 m
55Mixed
A mixed day on Crib y Ddysgl, with cloud on the tops early.
Wind26 mph SEGusts 34 mph
Rain0.0 mm
Summit views49%
Crib Goch923 m
60Mixed
A mixed day on Crib Goch: dry and breezy.
Wind26 mph SEGusts 34 mph
Rain0.0 mm
Summit views62%
Elidir Fawr924 m
60Mixed
A mixed day on Elidir Fawr: dry and breezy.
Wind26 mph SEGusts 34 mph
Rain0.0 mm
Summit views62%
Y Garn947 m
60Mixed
A mixed day on Y Garn: dry and breezy.
Wind26 mph SEGusts 34 mph
Rain0.0 mm
Summit views60%
Glyder Fawr1,001 m
56Mixed
A mixed day on Glyder Fawr, with cloud on the tops early.
Wind25 mph SEGusts 33 mph
Rain0.0 mm
Summit views55%
Glyder Fach994 m
58Mixed
A mixed day on Glyder Fach: dry and breezy.
Wind26 mph SEGusts 34 mph
Rain0.0 mm
Summit views56%
Tryfan918 m
48Poor
A poor day on the tops of Tryfan, with a blustery wind.
Wind33 mph SEGusts 44 mph
Rain0.1 mm
Summit views63%
Pen yr Ole Wen978 m
44Poor
A poor day on the tops of Pen yr Ole Wen, with a blustery wind and cloud on the tops early.
Wind33 mph SEGusts 44 mph
Rain0.1 mm
Summit views58%
Carnedd Dafydd1,044 m
44Poor
A poor day on the tops of Carnedd Dafydd, with a blustery wind and cloud on the tops early.
Wind32 mph SEGusts 43 mph
Rain0.1 mm
Summit views53%
Carnedd Llewelyn1,064 mLimiting summit
40Poor
A poor day on the tops of Carnedd Llewelyn, with a blustery wind and cloud coming and going on the summit.
Wind33 mph SEGusts 44 mph
Rain0.1 mm
Summit views52%
Yr Elen962 m
44Poor
A poor day on the tops of Yr Elen, with a blustery wind and cloud on the tops early.
Wind33 mph SEGusts 44 mph
Rain0.1 mm
Summit views59%
Foel Grach975 m
47Poor
A poor day on the tops of Foel Grach, with a blustery wind and cloud on the tops early.
Wind32 mph SEGusts 42 mph
Rain0.1 mm
Summit views58%
Carnedd Gwenllian (Garnedd Uchaf)925 m
52Mixed
A mixed day on Garnedd Uchaf, with a blustery wind.
Wind30 mph SEGusts 40 mph
Rain0.1 mm
Summit views62%
Foel-fras944 m
48Poor
A poor day on the tops of Foel-fras, with a blustery wind.
Wind32 mph SEGusts 43 mph
Rain0.1 mm
Summit views61%
Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.
Moon for your challenge
Night before your chosen day: Sunday 18 October 2026
Eryri (Snowdonia)
Area reference: Glyder Fawr. Local mountain horizons will vary.
Moon information is unavailable for this night at this summit. An earlier night may no longer be in the current forecast.
Night beginning Monday 19 October 2026
Eryri (Snowdonia)
Area reference: Glyder Fawr. Local mountain horizons will vary.
Waxing gibbous moon
- Illuminated disc
- 63%
- Moonrise
- Outside this window
- Moonset
- 00:28 next morning BST
Moon up during darker hours18:45 BST to 00:30 BST next morning
Window: 19 Oct, 17:00 BST to 20 Oct, 08:00 BST
Approximate times in UK local time, for an open horizon. Moon-up periods are rounded to five minutes. Hills and cloud can hide the Moon. Illumination is the sunlit percentage of its disc, not how bright your route will be. Darker hours here begin after civil twilight. This almanac covers only the stated overnight window and does not change the weather grade. Take a headtorch and spare power regardless.
Planning the Welsh 3000s
The Welsh 3000s crosses the Yr Wyddfa, Glyderau and Carneddau ranges, taking in 15 summits above 3,000 feet. Its length, exposed scrambling and repeated high ground make a single valley forecast inadequate for choosing a day.
The combined grade is deliberately conservative and gives extra weight to the weakest summit. Review every row, especially Crib Goch and Tryfan, and use the full peak pages for timing and hazard detail.
Read BMC Welsh 3000s guide