72% chance of a view, in and out of it all day.
Cloud base sits about 27 m above the summit, so the top should stay under a ceiling rather than in it.
Forecast for Friday 16 October, built 2026-10-16 16:22 UTC and rebuilt twice a day. A high number is close to reliable, a low one is barely better than a shrug: how reliable is this?
Fri 16 Oct
72%
in and out of it all day
Sat 17 Oct
93%
clear of the cloud
Sun 18 Oct
94%
clear of the cloud
The hill
- Lists
- Hewitt, Nuttall, Marilyn
- Height
- 734 m (398 m of drop)
- Area
- Moel Hebog
- County
- Gwynedd, Wales
- Grid ref
- SH525502
- OS Landranger
- 115
- Summit
- windshelter on ancient cairn
Sun
- Sunrise
- 06:45 ESE
- Sunset
- 17:19 WSW
- Daylight
- 10.57 hours
About Craig Cwm Silyn
Craig Cwm Silyn is a mountain in Snowdonia, North Wales which forms the highest point on the celebrated Nantlle Ridge.
From Wikipedia, CC BY-SA 4.0
Hour by hour, Friday 16 October
| Hour | View | Cloud base | Temp | Wind |
|---|---|---|---|---|
| 06:00 | 48% | 493 m | 4.8° | 18 NW |
| 08:00 | 49% | 483 m | 4.4° | 21 NW |
| 10:00 | 60% | 608 m | 4.7° | 24 NW |
| 12:00 | 69% | 761 m | 4.6° | 24 NW |
| 14:00 | 77% | 1,005 m | 4.9° | 24 NW |
| 16:00 | 98% | 1,808 m | 5.5° | 24 NW |
| 18:00 | 89% | 629 m | 5.3° | 28 NNW |
| 20:00 | 89% | 781 m | 5.4° | 30 NNW |
Nearby
Mynydd Tal-y-mignedd · Trum y Ddysgl · Mynydd Drws-y-coed · Moel Lefn · Mynydd Graig Goch · Moel yr Ogof
All Snowdonia hills for Friday 16 October · The week ahead · How to read this