Snowdon - Yr Wyddfa1,085 mLimiting summit
64Mixed
A mixed day on Snowdon - Yr Wyddfa, with sleet or snow up high.
Wind17 mph WGusts 23 mph
Rain0.2 mm
Summit views71%
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
64Mixed
A mixed day on Crib y Ddysgl, with sleet or snow up high.
Wind17 mph WGusts 23 mph
Rain0.2 mm
Summit views71%
Crib Goch923 m
69Mixed
A mixed day on Crib Goch, with sleet or snow up high.
Wind17 mph WGusts 23 mph
Rain0.2 mm
Summit views76%
Elidir Fawr924 m
69Mixed
A mixed day on Elidir Fawr, with sleet or snow up high.
Wind17 mph WGusts 23 mph
Rain0.2 mm
Summit views76%
Y Garn947 m
68Mixed
A mixed day on Y Garn, with sleet or snow up high.
Wind17 mph WGusts 23 mph
Rain0.2 mm
Summit views75%
Glyder Fawr1,001 m
67Mixed
A mixed day on Glyder Fawr, with sleet or snow up high.
Wind17 mph WGusts 23 mph
Rain0.2 mm
Summit views73%
Glyder Fach994 m
66Mixed
A mixed day on Glyder Fach, with sleet or snow up high.
Wind17 mph WGusts 23 mph
Rain0.2 mm
Summit views74%
Tryfan918 m
80Good
A good day on Tryfan: light winds and clear tops for most of the day.
Wind17 mph WGusts 23 mph
Rain0.2 mm
Summit views85%
Pen yr Ole Wen978 m
77Good
A good day on Pen yr Ole Wen, though expect sleet or snow up high.
Wind17 mph WGusts 23 mph
Rain0.2 mm
Summit views83%
Carnedd Dafydd1,044 m
77Good
A good day on Carnedd Dafydd, though expect sleet or snow up high.
Wind17 mph WGusts 23 mph
Rain0.2 mm
Summit views81%
Carnedd Llewelyn1,064 m
78Good
A good day on Carnedd Llewelyn, though expect sleet or snow up high.
Wind17 mph WGusts 23 mph
Rain0.2 mm
Summit views80%
Yr Elen962 m
78Good
A good day on Yr Elen, though expect sleet or snow up high.
Wind17 mph WGusts 23 mph
Rain0.2 mm
Summit views83%
Foel Grach975 m
78Good
A good day on Foel Grach, though expect sleet or snow up high.
Wind17 mph WGusts 22 mph
Rain0.2 mm
Summit views83%
Carnedd Gwenllian (Garnedd Uchaf)925 m
81Good
A good day on Garnedd Uchaf: light winds and clear tops for most of the day.
Wind15 mph WGusts 21 mph
Rain0.2 mm
Summit views85%
Foel-fras944 m
78Good
A good day on Foel-fras, though expect sleet or snow up high.
Wind17 mph WGusts 22 mph
Rain0.2 mm
Summit views84%
Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.
Moon for your challenge
Night before your chosen day: Wednesday 21 October 2026
Eryri (Snowdonia)
Area reference: Glyder Fawr. Local mountain horizons will vary.
Waxing gibbous moon
- Illuminated disc
- 80%
- Moonrise
- Outside this window
- Moonset
- 03:03 next morning BST
Moon up during darker hours18:45 BST to 03:05 BST next morning
Window: 21 Oct, 17:00 BST to 22 Oct, 08:00 BST
Night beginning Thursday 22 October 2026
Eryri (Snowdonia)
Area reference: Glyder Fawr. Local mountain horizons will vary.
Waxing gibbous moon
- Illuminated disc
- 88%
- Moonrise
- Outside this window
- Moonset
- 04:22 next morning BST
Moon up during darker hours18:40 BST to 04:20 BST next morning
Window: 22 Oct, 17:00 BST to 23 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