We stayed there for a week about 3 years ago - weather lovely but had one day when it lashed! Cleared up later. A day trip (because you'll spend the whole day there - it's just fantastic) to Pompeii - get the local train & the headphones when you get there. There are tours but much cheaper & you can suit yourself if you do it on your own. Also get the local bus around the coast to Amalfi - white knuckle ride - but beautiful. If you get a chance go to Positano (on the way to Amalfi) just lovely. We walked up & down the steps to Positano - nearly killed me on the way back up! Then I discovered that there is a bus back up to the mail road - DOH! I'm so jealous of your trip!!!