Allow me to state the obvious. We have an expression in the UK that is charming yet illustrative of the fickle nature of the British Summer and the gloomyness of the British Winter. It is..."Nice weather for ducks!" Although we are not surrounded by Sherlock Holmesian fogs 24 hours a day, neither do we yet enjoy the balmy summers soon to be foisted upon us by global warming.
In Avebury, although there is a small museum housing archeological finds, everything you will want to see is outside and open to the elements. The taller stones may offer a little shelter from a keen wind but it's better to be prepared with a mac and brolly than sit inside a coach or car trying to 'experience' the stones through a misted up windscreen. I mean, is there any greater joy than staying droll and dry whilst the masses scatter back to their vehicles in panic?! I think not!! (By the way, don't bother looking for a duck pond..there isn't one).
Getting the best out of Avebury isn't the stuff of a Sunday stroll, you have to work at it! Proper walking boots are essential and waterproofs would be wise. The banks and ditches can be treacherously slippery after wet weather, and the Downs can be bleak.
Photo Equipment: Lots of film - you'll want to take lots of photos and there isn't much scope for buying film in the village.
Miscellaneous: You need a map - Ordnance Survey Explorer sheet 157 Marlborough & Savernake Forest.