Tomorrow: Send. Dry, cold and crisp: great friction, best from 12:00.
How to read the dial
- Dry
- Fast‑drying sectors only
- Wet
- Now
- When it dries
Tomorrow: Send. Dry, cold and crisp: great friction, best from 12:00.
Only these emails, and every one has a stop link. Privacy
Bouldering gyms near the forest, for a wet day.
Rozas: sandstone boulders in the forest, in Castile and León, Spain. The nearest other areas here are Ahedo (7 km), Resconorio (9 km) and Miera (22 km).
The answer at the top of this page comes from ECMWF'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.
Rozas 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.
Wet sandstone breaks. If a hold feels cool or damp, leave it for another day.