The Lavra monk Theologos started a weather blog (weatherlavra.blogspot.gr) with a live weather webcam, that refreshes every 5 seconds (today 30/5 the camera is not working).
The site also has a rain radar of Chalkidiki:
and satelite images:
Theologos also has two other sites about Athos (in Greek), athosmount.blogspot.gr and he reported about the earthquake on his news site: athosnews.blogspot.gr. The pictures of monk Theologos are here on Flickr.
Wim, 29/5 (thanks Vasilis)