32% chance of a view, in cloud all day.
The summit sits about 558 m inside the layer.
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
32%
in cloud all day
Sat 17 Oct
76%
in and out of it all day
Sun 18 Oct
94%
clear of the cloud
The hill
- Lists
- Hewitt, Nuttall, Marilyn
- Height
- 1,062 m (748 m of drop)
- Area
- The Carneddau
- County
- Conwy, Gwynedd, Wales
- Grid ref
- SH683643
- OS Landranger
- 115
- Summit
- cairn
Sun
- Sunrise
- 06:44 ESE
- Sunset
- 17:18 WSW
- Daylight
- 10.57 hours
About Carnedd Llewelyn
Carnedd Llewelyn, also spelled Carnedd Llywelyn, is a mountain massif in the Carneddau range in Snowdonia, north-west Wales. It is the highest point of the Carneddau at 1,064 metres (3,491 ft) and the second-highest peak by relative height in Wales, 49th in the British Isles and lies on the border between Gwynedd and Conwy.
From Wikipedia, CC BY-SA 4.0
Hour by hour, Friday 16 October
| Hour | View | Cloud base | Temp | Wind |
|---|---|---|---|---|
| 06:00 | 15% | 383 m | 2.2° | 21 WNW |
| 08:00 | 18% | 394 m | 1.9° | 22 WNW |
| 10:00 | 17% | 406 m | 2.5° | 24 WNW |
| 12:00 | 26% | 504 m | 2.2° | 23 WNW |
| 14:00 | 44% | 650 m | 2.1° | 24 NW |
| 16:00 | 20% | 463 m | 2.0° | 27 NW |
| 18:00 | 23% | 474 m | 2.5° | 29 NW |
| 20:00 | 21% | 508 m | 2.8° | 29 NNW |
Nearby
Yr Elen · Foel Grach · Pen yr Helgi Du · Carnedd Dafydd · Garnedd Uchaf · Pen yr Ole Wen
All Snowdonia hills for Friday 16 October · The week ahead · How to read this