Snowdon - Yr Wyddfa1,085 mLimiting summit
26Poor
A poor day on the tops of Snowdon - Yr Wyddfa, with strong, gusty winds.
Wind35 mph WGusts 47 mph
Rain1.8 mm
Summit views74%
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
26Poor
A poor day on the tops of Crib y Ddysgl, with strong, gusty winds.
Wind35 mph WGusts 47 mph
Rain1.8 mm
Summit views75%
Crib Goch923 m
26Poor
A poor day on the tops of Crib Goch, with strong, gusty winds.
Wind35 mph WGusts 47 mph
Rain1.8 mm
Summit views83%
Elidir Fawr924 m
26Poor
A poor day on the tops of Elidir Fawr, with strong, gusty winds.
Wind35 mph WGusts 47 mph
Rain1.8 mm
Summit views83%
Y Garn947 m
26Poor
A poor day on the tops of Y Garn, with strong, gusty winds.
Wind35 mph WGusts 47 mph
Rain1.8 mm
Summit views81%
Glyder Fawr1,001 m
26Poor
A poor day on the tops of Glyder Fawr, with strong, gusty winds.
Wind35 mph WGusts 47 mph
Rain1.8 mm
Summit views78%
Glyder Fach994 m
26Poor
A poor day on the tops of Glyder Fach, with strong, gusty winds.
Wind35 mph WGusts 47 mph
Rain1.8 mm
Summit views78%
Tryfan918 m
40Poor
A poor day on the tops of Tryfan, with strong, gusty winds.
Wind37 mph WGusts 49 mph
Rain0.3 mm
Summit views95%
Pen yr Ole Wen978 m
40Poor
A poor day on the tops of Pen yr Ole Wen, with strong, gusty winds.
Wind37 mph WGusts 49 mph
Rain0.3 mm
Summit views94%
Carnedd Dafydd1,044 m
40Poor
A poor day on the tops of Carnedd Dafydd, with strong, gusty winds.
Wind37 mph WGusts 49 mph
Rain0.3 mm
Summit views94%
Carnedd Llewelyn1,064 m
42Poor
A poor day on the tops of Carnedd Llewelyn, with strong, gusty winds.
Wind36 mph WGusts 47 mph
Rain0.3 mm
Summit views94%
Yr Elen962 m
40Poor
A poor day on the tops of Yr Elen, with strong, gusty winds.
Wind37 mph WGusts 49 mph
Rain0.3 mm
Summit views94%
Foel Grach975 m
42Poor
A poor day on the tops of Foel Grach, with strong, gusty winds.
Wind36 mph WGusts 48 mph
Rain0.3 mm
Summit views94%
Carnedd Gwenllian (Garnedd Uchaf)925 m
46Poor
A poor day on the tops of Garnedd Uchaf, with a blustery wind.
Wind33 mph WGusts 44 mph
Rain0.3 mm
Summit views95%
Foel-fras944 m
42Poor
A poor day on the tops of Foel-fras, with strong, gusty winds.
Wind36 mph WGusts 48 mph
Rain0.3 mm
Summit views95%
Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.
Moon for your challenge
Night before your chosen day: Saturday 24 October 2026
Eryri (Snowdonia)
Area reference: Glyder Fawr. Local mountain horizons will vary.
Near-full moon
- Illuminated disc
- 98%
- Moonrise
- Outside this window
- Moonset
- 06:09 next morning GMT
Moon up during darker hours18:35 BST to 06:10 GMT next morning
Window: 24 Oct, 17:00 BST to 25 Oct, 08:00 GMT
Night beginning Sunday 25 October 2026
Eryri (Snowdonia)
Area reference: Glyder Fawr. Local mountain horizons will vary.
Near-full moon
- Illuminated disc
- 100%
- Moonrise
- Outside this window
- Moonset
- 07:39 next morning GMT
Moon up during darker hours17:35 GMT to 06:25 GMT next morning
Window: 25 Oct, 17:00 GMT to 26 Oct, 08:00 GMT
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