Can I climb todayToday: Maybe. Only the sunniest, windiest boulders from 11:00, if any. Sandstone can still be wet inside when the surface feels dry.
How to read the dial
- Dry
- Fast‑drying sectors only
- Wet
- Now
- When it dries
Blok Sessions
Today's weather
The week ahead
Email me when it's dry
Only these emails, and every one has a stop link. Privacy
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The best-known areas today
Climb indoors instead
Bouldering gyms near the forest, for a wet day.
Before you go
Best time to climb at Avalonia, month by month
Avalonia after rain
Avalonia: sandstone boulders in the forest, in North Rhine-Westphalia, Germany. The nearest other areas here are Glees (107 km), Rocher de Nasproué (136 km) and Rochers de Stoumont (158 km).
Is Avalonia dry today?
The answer at the top of this page comes from the German weather service's forecast and how fast sandstone dries, and it's updated through the day. Nobody checks the rock in person, so touch the holds before you climb.
How long does Avalonia take to dry after rain?
Avalonia is sandstone, which soaks up rain and stays weak inside for a while after the surface looks dry. These times are the model's estimates, tuned on Fontainebleau sandstone and not checked here. After a proper soaking (2 mm of rain or more), sunny, windy boulders need about 18 hours of dry weather, most of the forest about 30 hours, and shaded ones about 42 hours. A light shower needs less. Wind, sun and dry air shorten the wait, and above about 92% humidity the model won't call the rock dry.
Can you climb at Avalonia when the rock is wet?
Wet sandstone breaks. If a hold feels cool or damp, leave it for another day.