I was on Ben Nevis yesterday with John and a team of Alasdair, Fiona, Harry, Lindsay, Mercy and Wilson from Falkirk Community Trust Outdoors. We scrambled/climbed Castle Ridge, one of the classic Ben Nevis ridges. There was some dampness/seepage on the lower slabs, but once on the ridge itself the rock was generally dry. Cloud was hovering around the summit level and we had one light shower, otherwise conditions were excellent with a light breeze keeping most of the midges away.
To descend after finishing the ridge I’d definitely recommend continuing up to just above the 1150m contour and contouring South to reach the Tourist Track rather than descending the screes as some books suggest.