Snowdon - Yr Wyddfa1,085 m
95Excellent
A fine day on Snowdon - Yr Wyddfa: dry, with light winds.
Wind16 mph SGusts 20 mph
Rain0.0 mm
Summit views61%
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
88Excellent
A fine day on Cadair Idris - Penygadair: dry, with light winds.
Wind18 mph SEGusts 24 mph
Rain0.0 mm
Summit views59%
Pen y Fan886 mLimiting summit
78Good
A good day on Pen y Fan: dry and breezy.
Wind23 mph SEGusts 31 mph
Rain0.0 mm
Summit views45%
Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.
Moon for your challenge
Night before your chosen day: Thursday 19 November 2026
Snowdon - Yr Wyddfa
Waxing gibbous moon
- Illuminated disc
- 75%
- Moonrise
- Outside this window
- Moonset
- 02:16 next morning GMT
Moon up during darker hours17:00 GMT to 02:15 GMT next morning
Window: 19 Nov, 17:00 GMT to 20 Nov, 08:00 GMT
Cadair Idris - Penygadair
Waxing gibbous moon
- Illuminated disc
- 75%
- Moonrise
- Outside this window
- Moonset
- 02:15 next morning GMT
Moon up during darker hours17:00 GMT to 02:15 GMT next morning
Window: 19 Nov, 17:00 GMT to 20 Nov, 08:00 GMT
Pen y Fan
Waxing gibbous moon
- Illuminated disc
- 75%
- Moonrise
- Outside this window
- Moonset
- 02:13 next morning GMT
Moon up during darker hours17:00 GMT to 02:15 GMT next morning
Window: 19 Nov, 17:00 GMT to 20 Nov, 08:00 GMT
Night beginning Friday 20 November 2026
Snowdon - Yr Wyddfa
Waxing gibbous moon
- Illuminated disc
- 83%
- Moonrise
- Outside this window
- Moonset
- 03:38 next morning GMT
Moon up during darker hours17:00 GMT to 03:40 GMT next morning
Window: 20 Nov, 17:00 GMT to 21 Nov, 08:00 GMT
Cadair Idris - Penygadair
Waxing gibbous moon
- Illuminated disc
- 83%
- Moonrise
- Outside this window
- Moonset
- 03:36 next morning GMT
Moon up during darker hours17:00 GMT to 03:35 GMT next morning
Window: 20 Nov, 17:00 GMT to 21 Nov, 08:00 GMT
Pen y Fan
Waxing gibbous moon
- Illuminated disc
- 83%
- Moonrise
- Outside this window
- Moonset
- 03:33 next morning GMT
Moon up during darker hours17:00 GMT to 03:35 GMT next morning
Window: 20 Nov, 17:00 GMT to 21 Nov, 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 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