Snowdon - Yr Wyddfa1,085 m
98Excellent
A fine day on Snowdon - Yr Wyddfa: dry, with light winds and clear tops for most of the day.
Wind17 mph NEGusts 23 mph
Rain0.0 mm
Summit views97%
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
98Excellent
A fine day on Crib y Ddysgl: dry, with light winds and clear tops for most of the day.
Wind17 mph NEGusts 23 mph
Rain0.0 mm
Summit views97%
Crib Goch923 m
98Excellent
A fine day on Crib Goch: dry, with light winds and clear tops for most of the day.
Wind17 mph NEGusts 23 mph
Rain0.0 mm
Summit views97%
Elidir Fawr924 m
98Excellent
A fine day on Elidir Fawr: dry, with light winds and clear tops for most of the day.
Wind17 mph NEGusts 23 mph
Rain0.0 mm
Summit views97%
Y Garn947 m
98Excellent
A fine day on Y Garn: dry, with light winds and clear tops for most of the day.
Wind17 mph NEGusts 23 mph
Rain0.0 mm
Summit views97%
Glyder Fawr1,001 m
98Excellent
A fine day on Glyder Fawr: dry, with light winds and clear tops for most of the day.
Wind17 mph NEGusts 22 mph
Rain0.0 mm
Summit views97%
Glyder Fach994 m
98Excellent
A fine day on Glyder Fach: dry, with light winds and clear tops for most of the day.
Wind17 mph NEGusts 23 mph
Rain0.0 mm
Summit views97%
Tryfan918 mLimiting summit
86Excellent
A fine day on Tryfan: dry, with light winds and clear tops for most of the day.
Wind19 mph EGusts 25 mph
Rain0.0 mm
Summit views97%
Pen yr Ole Wen978 m
86Excellent
A fine day on Pen yr Ole Wen: dry, with light winds and clear tops for most of the day.
Wind19 mph EGusts 25 mph
Rain0.0 mm
Summit views97%
Carnedd Dafydd1,044 m
86Excellent
A fine day on Carnedd Dafydd: dry, with light winds and clear tops for most of the day.
Wind19 mph EGusts 25 mph
Rain0.0 mm
Summit views96%
Carnedd Llewelyn1,064 m
86Excellent
A fine day on Carnedd Llewelyn: dry, with light winds and clear tops for most of the day.
Wind19 mph EGusts 25 mph
Rain0.0 mm
Summit views96%
Yr Elen962 m
86Excellent
A fine day on Yr Elen: dry, with light winds and clear tops for most of the day.
Wind19 mph EGusts 25 mph
Rain0.0 mm
Summit views97%
Foel Grach975 m
87Excellent
A fine day on Foel Grach: dry, with light winds and clear tops for most of the day.
Wind18 mph EGusts 24 mph
Rain0.0 mm
Summit views97%
Carnedd Gwenllian (Garnedd Uchaf)925 m
88Excellent
A fine day on Garnedd Uchaf: dry, with light winds and clear tops for most of the day.
Wind16 mph EGusts 22 mph
Rain0.0 mm
Summit views97%
Foel-fras944 m
88Excellent
A fine day on Foel-fras: dry, with light winds and clear tops for most of the day.
Wind18 mph EGusts 23 mph
Rain0.0 mm
Summit views97%
Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.
Moon for your challenge
Night before your chosen day: Saturday 17 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 Sunday 18 October 2026
Eryri (Snowdonia)
Area reference: Glyder Fawr. Local mountain horizons will vary.
First-quarter moon
- Illuminated disc
- 53%
- Moonrise
- Outside this window
- Moonset
- 23:11 BST
Moon up during darker hours18:50 BST to 23:10 BST
Window: 18 Oct, 17:00 BST to 19 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