Snowdon - Yr Wyddfa1,085 mLimiting summit
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 Three Peaks weather forecast
Compare the mountain weather on Yr Wyddfa, Cadair Idris and Pen y Fan before choosing a day for the Welsh Three Peaks.
3 summitsThree mountains spread across Wales
Forecast comparison
Every summit is shown side by side. The combined grade gives extra weight to the weakest forecast.
SummitGradeForecast summaryWindRainSummit viewsDetails
Cadair Idris - Penygadair893 m
60Mixed
A mixed day on Cadair Idris - Penygadair: dry and breezy.
Wind24 mph SEGusts 32 mph
Rain0.1 mm
Summit views58%
Pen y Fan886 m
70Good
A good day on Pen y Fan: light winds.
Wind20 mph SEGusts 27 mph
Rain0.2 mm
Summit views76%
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
Snowdon - Yr Wyddfa
Moon information is unavailable for this night at this summit. An earlier night may no longer be in the current forecast.
Cadair Idris - Penygadair
Moon information is unavailable for this night at this summit. An earlier night may no longer be in the current forecast.
Pen y Fan
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
Snowdon - Yr Wyddfa
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
Cadair Idris - Penygadair
Waxing gibbous moon
- Illuminated disc
- 63%
- Moonrise
- Outside this window
- Moonset
- 00:29 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
Pen y Fan
Waxing gibbous moon
- Illuminated disc
- 63%
- Moonrise
- Outside this window
- Moonset
- 00:30 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 Three Peaks
The Welsh Three Peaks Challenge links three iconic mountains across north, mid and south Wales. Because the summits are widely separated, the forecast can vary far more than a single Wales-wide weather summary suggests.
Treat the combined grade as a quick comparison, then read each mountain row. A good forecast on one summit does not imply similar wind, cloud or rain on the other two.
Read Welsh Three Peaks route information