55% chance of a view, in and out of it all day.
The summit sits about 125 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
55%
in and out of it all day
Sat 17 Oct
87%
clear of the cloud
Sun 18 Oct
94%
clear of the cloud
The hill
- Lists
- Hewitt, Nuttall
- Height
- 762 m (42 m of drop)
- Area
- The Glyders
- County
- Conwy, Wales
- Grid ref
- SH685585
- OS Landranger
- 115
- Summit
- large rock 11m NNW of cairn
Sun
- Sunrise
- 06:44 ESE
- Sunset
- 17:18 WSW
- Daylight
- 10.57 hours
About Gallt yr Ogof
Gallt yr Ogof is a mountain in Snowdonia, North Wales. It is a subsidiary top of Glyder Fawr, and is the most easterly summit over 2,000 feet in the Glyderau mountain range, the most easterly hill being Cefn y Capel. Gallt yr Ogof is 763 metres high.
From Wikipedia, CC BY-SA 4.0
Hour by hour, Friday 16 October
| Hour | View | Cloud base | Temp | Wind |
|---|---|---|---|---|
| 06:00 | 35% | 402 m | 4.2° | 20 WNW |
| 08:00 | 41% | 435 m | 3.9° | 20 WNW |
| 10:00 | 43% | 470 m | 4.4° | 20 WNW |
| 12:00 | 54% | 637 m | 4.5° | 20 NW |
| 14:00 | 61% | 744 m | 4.7° | 22 NW |
| 16:00 | 47% | 592 m | 4.3° | 26 NW |
| 18:00 | 49% | 580 m | 4.3° | 24 NW |
| 20:00 | 45% | 593 m | 4.7° | 21 NW |
Nearby
Y Foel Goch · Tryfan · Glyder Fach · Glyder Fawr · Moel Siabod · Pen yr Ole Wen
All Snowdonia hills for Friday 16 October · The week ahead · How to read this