Snowdon - Yr Wyddfa1,085 mLimiting summit
48Poor
A poor day on the tops of Snowdon - Yr Wyddfa, with sleet or snow up high.
Wind34 mph SWGusts 45 mph
Rain4.8 mm
Summit views82%
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
50Mixed
A mixed day on Crib y Ddysgl, with drizzle arriving in the early afternoon.
Wind34 mph SWGusts 45 mph
Rain4.8 mm
Summit views83%
Crib Goch923 m
50Mixed
A mixed day on Crib Goch, with drizzle arriving in the early afternoon.
Wind34 mph SWGusts 45 mph
Rain4.8 mm
Summit views84%
Elidir Fawr924 m
50Mixed
A mixed day on Elidir Fawr, with drizzle arriving in the early afternoon.
Wind34 mph SWGusts 45 mph
Rain4.8 mm
Summit views84%
Y Garn947 m
50Mixed
A mixed day on Y Garn, with drizzle arriving in the early afternoon.
Wind34 mph SWGusts 45 mph
Rain4.8 mm
Summit views84%
Glyder Fawr1,001 m
50Mixed
A mixed day on Glyder Fawr, with drizzle arriving in the early afternoon.
Wind34 mph SWGusts 45 mph
Rain4.8 mm
Summit views83%
Glyder Fach994 m
50Mixed
A mixed day on Glyder Fach, with drizzle arriving in the early afternoon.
Wind34 mph SWGusts 45 mph
Rain4.8 mm
Summit views84%
Tryfan918 m
54Mixed
A mixed day on Tryfan, with drizzle arriving in the early afternoon.
Wind29 mph SWGusts 38 mph
Rain2.7 mm
Summit views94%
Pen yr Ole Wen978 m
51Mixed
A mixed day on Pen yr Ole Wen, with drizzle arriving in the early afternoon.
Wind31 mph SWGusts 41 mph
Rain2.7 mm
Summit views93%
Carnedd Dafydd1,044 m
50Mixed
A mixed day on Carnedd Dafydd, with drizzle arriving in the early afternoon.
Wind29 mph SWGusts 38 mph
Rain2.7 mm
Summit views93%
Carnedd Llewelyn1,064 m
52Mixed
A mixed day on Carnedd Llewelyn, with drizzle arriving in the early afternoon.
Wind29 mph SWGusts 38 mph
Rain2.7 mm
Summit views93%
Yr Elen962 m
51Mixed
A mixed day on Yr Elen, with drizzle arriving in the early afternoon.
Wind31 mph SWGusts 41 mph
Rain2.7 mm
Summit views94%
Foel Grach975 m
52Mixed
A mixed day on Foel Grach, with drizzle arriving in the early afternoon.
Wind28 mph SWGusts 38 mph
Rain2.7 mm
Summit views93%
Carnedd Gwenllian (Garnedd Uchaf)925 m
60Mixed
A mixed day on Garnedd Uchaf, with drizzle arriving in the early afternoon.
Wind26 mph SWGusts 34 mph
Rain2.7 mm
Summit views94%
Foel-fras944 m
54Mixed
A mixed day on Foel-fras, with drizzle arriving in the early afternoon.
Wind28 mph SWGusts 37 mph
Rain2.7 mm
Summit views94%
Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.
Moon for your challenge
Night before your chosen day: Friday 23 October 2026
Eryri (Snowdonia)
Area reference: Glyder Fawr. Local mountain horizons will vary.
Waxing gibbous moon
- Illuminated disc
- 94%
- Moonrise
- Outside this window
- Moonset
- 05:43 next morning BST
Moon up during darker hours18:40 BST to 05:45 BST next morning
Window: 23 Oct, 17:00 BST to 24 Oct, 08:00 BST
Night beginning 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
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