South Wales Valleys · climbing crag beta

Cilfrew Edge (Craig Gwladys) climbing conditions.

Aspect-aware crag drying, rain and exposed-wind guidance for sandstone climbing.

Friday 28 August 2026

Poor.

Thunder risk increases the seriousness of exposed climbing.

18/100
Seven-day outlook

Cilfrew Edge (Craig Gwladys) day by day.

The headline stays short. Expand a day to compare recent rain, drying windows, surface state and the wind on the climb with more exposed ground above.

PoorThunder risk increases the seriousness of exposed climbing.18/100
168 m · representative sector

Main crag

18/100

Thunder risk increases the seriousness of exposed climbing.

Rock surface
Wet or seeping
Recent rain
11.6 mm / 24 h
Climbing-window rain
5.6 mm
Face wind / gust
7 / 15 mph
Above-crag gust
17 mph
Best drying window
No clear drying window
Greasy-rock risk
High

Wind: The cliff face and open ground above have broadly similar wind exposure.

Do not recommend climbing until the rock is completely dry.

Did this match the crag?

A broad sector and surface report is enough; no route-level claim is needed.

PoorThunder risk increases the seriousness of exposed climbing.15/100
168 m · representative sector

Main crag

15/100

Thunder risk increases the seriousness of exposed climbing.

Rock surface
Wet or seeping
Recent rain
10.8 mm / 24 h
Climbing-window rain
6.3 mm
Face wind / gust
5 / 11 mph
Above-crag gust
19 mph
Best drying window
No clear drying window
Greasy-rock risk
High

Wind: The mapped face may be in the lee of the southeasterly wind, but open ground above the crag is more exposed, with gusts around 20 mph.

Do not recommend climbing until the rock is completely dry.

Did this match the crag?

A broad sector and surface report is enough; no route-level claim is needed.

PoorThunder risk increases the seriousness of exposed climbing.12/100
168 m · representative sector

Main crag

12/100

Thunder risk increases the seriousness of exposed climbing.

Rock surface
Wet or seeping
Recent rain
6.7 mm / 24 h
Climbing-window rain
13.3 mm
Face wind / gust
7 / 12 mph
Above-crag gust
17 mph
Best drying window
No clear drying window
Greasy-rock risk
High

Wind: Wind is somewhat stronger on open ground above the crag, where gusts reach about 15 mph.

Do not recommend climbing until the rock is completely dry.

Did this match the crag?

A broad sector and surface report is enough; no route-level claim is needed.

PoorThunder risk increases the seriousness of exposed climbing.18/100
168 m · representative sector

Main crag

18/100

Thunder risk increases the seriousness of exposed climbing.

Rock surface
Wet or seeping
Recent rain
23.2 mm / 24 h
Climbing-window rain
1.2 mm
Face wind / gust
10 / 18 mph
Above-crag gust
20 mph
Best drying window
No clear drying window
Greasy-rock risk
High

Wind: The cliff face and open ground above have broadly similar wind exposure.

Do not recommend climbing until the rock is completely dry.

Did this match the crag?

A broad sector and surface report is enough; no route-level claim is needed.

PoorThunder risk increases the seriousness of exposed climbing.18/100
168 m · representative sector

Main crag

18/100

Thunder risk increases the seriousness of exposed climbing.

Rock surface
Wet or seeping
Recent rain
3.0 mm / 24 h
Climbing-window rain
4.0 mm
Face wind / gust
7 / 13 mph
Above-crag gust
16 mph
Best drying window
No clear drying window
Greasy-rock risk
High

Wind: Wind is somewhat stronger on open ground above the crag, where gusts reach about 15 mph.

Do not recommend climbing until the rock is completely dry.

Did this match the crag?

A broad sector and surface report is enough; no route-level claim is needed.

PoorThunder risk increases the seriousness of exposed climbing.18/100
168 m · representative sector

Main crag

18/100

Thunder risk increases the seriousness of exposed climbing.

Rock surface
Wet or seeping
Recent rain
21.9 mm / 24 h
Climbing-window rain
4.7 mm
Face wind / gust
10 / 18 mph
Above-crag gust
21 mph
Best drying window
No clear drying window
Greasy-rock risk
High

Wind: The cliff face and open ground above have broadly similar wind exposure.

Do not recommend climbing until the rock is completely dry.

Did this match the crag?

A broad sector and surface report is enough; no route-level claim is needed.

PoorRain is likely to wet the crag during the climbing window.18/100
168 m · representative sector

Main crag

18/100

Rain is likely to wet the crag during the climbing window.

Rock surface
Wet or seeping
Recent rain
5.1 mm / 24 h
Climbing-window rain
1.1 mm
Face wind / gust
7 / 13 mph
Above-crag gust
14 mph
Best drying window
No clear drying window
Greasy-rock risk
High

Wind: The cliff face and open ground above have broadly similar wind exposure.

Do not recommend climbing until the rock is completely dry.

Did this match the crag?

A broad sector and surface report is enough; no route-level claim is needed.

Use it as a starting signal

Sandstone still needs an on-arrival check.

The forecast combines recent and expected rain with broad drying, humidity, dew and wind signals. The climb and open ground above the crag are treated separately where the mapped face gives useful shelter context.

Reviewed OSM cliff ways and broad face aspects, not route boundaries, exact belay positions or a climbing topo. Forecast-grid weather and representative sector geometry only. Check live access information and touch-test the rock before climbing.

Access: Check current landowner and BMC access information, seasonal restrictions and local notices before travelling.