Cairngorms · climbing crag beta

Hell's Lum Crag climbing conditions.

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

Friday 28 August 2026

Poor.

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

30/100
Seven-day outlook

Hell's Lum Crag 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.

PoorRain is likely to wet the crag during the climbing window.30/100
1094 m · representative sector

Main crag

30/100

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

Rock surface
Wet or seeping
Recent rain
0.9 mm / 24 h
Climbing-window rain
8.4 mm
Face wind / gust
10 / 19 mph
Above-crag gust
30 mph
Best drying window
No clear drying window
Greasy-rock risk
High

Wind: The mapped face may be in the lee of the northerly wind, but open ground above the crag is more exposed, with gusts around 30 mph.

Wet or seeping sections are likely; choose another crag or wait for direct observations.

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.30/100
1094 m · representative sector

Main crag

30/100

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

Rock surface
Wet or seeping
Recent rain
13.9 mm / 24 h
Climbing-window rain
1.5 mm
Face wind / gust
6 / 11 mph
Above-crag gust
18 mph
Best drying window
No clear drying window
Greasy-rock risk
High

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

Wet or seeping sections are likely; choose another crag or wait for direct observations.

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.30/100
1094 m · representative sector

Main crag

30/100

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

Rock surface
Wet or seeping
Recent rain
1.5 mm / 24 h
Climbing-window rain
0.3 mm
Face wind / gust
7 / 12 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.

Wet or seeping sections are likely; choose another crag or wait for direct observations.

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.25/100
1094 m · representative sector

Main crag

25/100

Thunder risk increases the seriousness of exposed climbing.

Rock surface
Wet or seeping
Recent rain
3.6 mm / 24 h
Climbing-window rain
4.4 mm
Face wind / gust
8 / 13 mph
Above-crag gust
23 mph
Best drying window
No clear drying window
Greasy-rock risk
High

Wind: The mapped face may be in the lee of the westerly wind, but open ground above the crag is more exposed, with gusts around 25 mph.

Wet or seeping sections are likely; choose another crag or wait for direct observations.

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.30/100
1094 m · representative sector

Main crag

30/100

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

Rock surface
Wet or seeping
Recent rain
4.8 mm / 24 h
Climbing-window rain
7.5 mm
Face wind / gust
8 / 16 mph
Above-crag gust
24 mph
Best drying window
No clear drying window
Greasy-rock risk
High

Wind: The mapped face may be in the lee of the southwesterly wind, but open ground above the crag is more exposed, with gusts around 25 mph.

Wet or seeping sections are likely; choose another crag or wait for direct observations.

Did this match the crag?

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

UncertainRecent rain leaves some drying uncertainty.48/100
1094 m · representative sector

Main crag

48/100

Recent rain leaves some drying uncertainty.

Rock surface
Damp or patchy
Recent rain
7.5 mm / 24 h
Climbing-window rain
0.0 mm
Face wind / gust
5 / 8 mph
Above-crag gust
13 mph
Best drying window
8 a.m.–2 p.m.
Greasy-rock risk
High

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

Some sectors may be usable, but shaded, polished or seeping sections could remain poor.

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.30/100
1094 m · representative sector

Main crag

30/100

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

Rock surface
Wet or seeping
Recent rain
0.9 mm / 24 h
Climbing-window rain
2.4 mm
Face wind / gust
4 / 8 mph
Above-crag gust
12 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 10 mph.

Wet or seeping sections are likely; choose another crag or wait for direct observations.

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

Granite 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.