Snowdon - Yr Wyddfa1,085 m
42Poor
A poor day on the tops of Snowdon - Yr Wyddfa, with strong, gusty winds and a bitter wind chill.
Wind37 mph EGusts 49 mph
Rain0.0 mm
Summit views55%
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
46Poor
A poor day on the tops of Cadair Idris - Penygadair, with strong, gusty winds and a bitter wind chill.
Wind37 mph EGusts 49 mph
Rain0.0 mm
Summit views40%
Pen y Fan886 mLimiting summit
-2Severe hill conditions
Serious conditions on Pen y Fan, with snow on the tops and strong, gusty winds.
Wind36 mph EGusts 47 mph
Rain9.4 mm
Summit views27%
Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.
Moon for your challenge
Night before your chosen day: Wednesday 18 November 2026
Snowdon - Yr Wyddfa
Waxing gibbous moon
- Illuminated disc
- 65%
- Moonrise
- Outside this window
- Moonset
- 00:58 next morning GMT
Moon up during darker hours17:00 GMT to 01:00 GMT next morning
Window: 18 Nov, 17:00 GMT to 19 Nov, 08:00 GMT
Cadair Idris - Penygadair
Waxing gibbous moon
- Illuminated disc
- 65%
- Moonrise
- Outside this window
- Moonset
- 00:58 next morning GMT
Moon up during darker hours17:00 GMT to 01:00 GMT next morning
Window: 18 Nov, 17:00 GMT to 19 Nov, 08:00 GMT
Pen y Fan
Waxing gibbous moon
- Illuminated disc
- 65%
- Moonrise
- Outside this window
- Moonset
- 00:56 next morning GMT
Moon up during darker hours17:00 GMT to 00:55 GMT next morning
Window: 18 Nov, 17:00 GMT to 19 Nov, 08:00 GMT
Night beginning 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
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