[sunkisser]

Don't take too much!
Shorts & t shirts are what most people wear. A fleece or cardigan for the evenings and restaurants (the air conditioning can be cold). Maybe some leggings or trousers for the girls if their legs get cold in the evenings.
Are you staying in a villa or hotel? If you have access to a washer/dryer then take a weeks worth of clothes and a few washing powder tablets. The first few times we went we always took too many clothes and didn't wear half of them.
Sun hats. Don't forget the sun hats.
Pac-a-macs just in case there is a shower.
Comfy shoes/sandals/trainers.