Right now

Temp12°C

Wind32 km/h

Gusts39 km/h

Humidity86.9%

Rain 48hdry

Last rainNone recent

Assessment

0.6mm rain forecast

Good friction temperature range for rhyolite

High humidity (86.9%) — rhyolite friction compromised, particularly for bouldering

Breezy — good for drying

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Wednesday 16 September

Poor

Temp12°C

Rain0.6mm

Wind30 km/h

Gusts39 km/h

Humidity86%

0.6mm rain forecast

Good temperature for mountain rhyolite
Wet rhyolite is slippery; seepage from grass above can linger
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

12:00 12° dry 32 39 86.9%

15:00 12° dry 27 35 84.76%

18:00 12° 0.3mm 20 40 92.47%

21:00 11° 0.3mm 23 49 91.54%

Thu Thursday 17 September

Poor

Temp12°C

Rain4mm

Wind24 km/h

Gusts46 km/h

Humidity77%

4mm rain forecastWindy — 24 km/h, gusts 46 km/h

Good temperature for mountain rhyolite
Wet rhyolite is slippery; seepage from grass above can linger
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 11° dry 17 37 90.69%

09:00 11° dry 22 41 83.46%

12:00 11° dry 25 46 76.7%

15:00 12° 0.2mm 24 44 77.69%

18:00 12° 0.1mm 16 36 81.19%

21:00 11° dry 18 39 84.08%

Fri Friday 18 September

Poor

Temp12°C

Rain8mm

Wind31 km/h

Gusts60 km/h

Humidity92%

8.3mm rain forecastWind 31 km/h, gusts 60 km/h — too windy

Good temperature for mountain rhyolite
Wet rhyolite is slippery; seepage from grass above can linger
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 10° dry 16 34 92.91%

09:00 11° dry 23 44 85%

12:00 12° 0.6mm 31 60 88.66%

15:00 12° 4mm 30 59 96.29%

18:00 12° 1mm 29 57 98.48%

21:00 13° 2mm 27 53 98.63%

Sat Saturday 19 September

Poor

Temp14°C

Rain10mm

Wind27 km/h

Gusts55 km/h

Humidity90%

9.5mm rain forecastWindy — 27 km/h, gusts 55 km/h

Good temperature for mountain rhyolite
Wet rhyolite is slippery; seepage from grass above can linger
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 13° 1mm 26 50 97.84%

09:00 13° 1mm 28 53 96.04%

12:00 14° 2mm 28 55 91.1%

15:00 14° 1mm 27 52 89.85%

18:00 14° 0.9mm 21 41 92.61%

21:00 12° dry 19 38 91.6%

Sun Sunday 20 September

Poor

Temp13°C

Rain0.3mm

Wind18 km/h

Gusts37 km/h

Humidity75%

0.3mm rain forecast

Good temperature for mountain rhyolite

Time °C Rain Wind (km/h) Gust Hum

06:00 10° dry 15 29 92.02%

09:00 11° dry 18 37 83.1%

12:00 12° dry 19 37 75.15%

15:00 13° dry 18 35 75.76%

18:00 12° dry 12 24 85.33%

21:00 11° 0.3mm 11 23 92.62%

Mon Monday 21 September

Poor

Temp15°C

Rain3mm

Wind17 km/h

Gusts33 km/h

Humidity93%

3.3mm rain forecastHumidity 93% — potential fog

Good temperature for mountain rhyolite
Wet rhyolite is slippery; seepage from grass above can linger

Time °C Rain Wind (km/h) Gust Hum

06:00 12° 0.5mm 13 25 97.65%

09:00 13° 0.5mm 14 29 95.38%

12:00 15° 0.5mm 17 33 92.52%

15:00 15° 0.4mm 16 32 92.72%

18:00 15° 0.4mm 13 25 96.94%

21:00 14° 0.3mm 11 22 98.33%

Tue Tuesday 22 September

Poor

Temp15°C

Rain4mm

Wind14 km/h

Gusts29 km/h

Humidity89%

3.5mm rain forecast

Good temperature for mountain rhyolite
Wet rhyolite is slippery; seepage from grass above can linger

Time °C Rain Wind (km/h) Gust Hum

06:00 13° 0.6mm 12 23 98.22%

09:00 14° 0.6mm 14 27 95.2%

12:00 14° 0.7mm 15 29 90.04%

15:00 15° 0.6mm 13 25 88.26%

18:00 14° 0.3mm 8 15 93.44%

21:00 12° dry 6 13 96.21%

Wed Wednesday 23 September

Caution

Temp13°C

Raindry

Wind13 km/h

Gusts27 km/h

Humidity78%

Drying — 18h since rain

Good temperature for mountain rhyolite

Time °C Rain Wind (km/h) Gust Hum

06:00 10° dry 6 12 97.17%

09:00 11° dry 9 20 87.14%

12:00 13° dry 13 27 78.23%

About Little Tryfan (Tryfan Bach)

The canonical UK trad-lead teaching crag — a low-angle rhyolite slab north-east of Tryfan proper, sitting in a sunny hollow above Gwern Gof Uchaf farm. South-east facing, low altitude, gentle-angled, well-featured with abundant gear placements, and topped by an easy walk-off — everything you want for first leads. Routes are short (single pitch, up to about 30m) and mostly V.Diff. Popular with instructors self-lining novices and with new leaders on their own; expect groups on any decent weekend. The Arête (D), The Slab (VDiff) and Crevasse Route (VDiff) are the routes everybody starts on. Fifteen-minute flat walk from the road.

Region: Snowdonia — Ogwen
Rock type: Rhyolite
Aspect: south-east-facing
Altitude: 300m
Exposure: low
Seepage: low

Other crags in this region

Glyder Fach (Main Cliff)Tryfan (Heather Terrace & Grooved Arete)