Bit early I'd say but MWIS usually quite good at giving you an idea.
http://www.mwis.org.uk/forecast.php?area=4
PLANNING OUTLOOK: all mountain areas of Britain from Wednesday
Improving conditions across the western half of the UK on Wednesday after early low clouds clear, but extensive low clouds/drizzle in the east. A band of rain overnight into Thursday will cross from the west with much clearer conditions persisting into Friday before a further rain spreads in.
Becoming cooler and showery into the weekend.