hi Andy and Sue.We,ve been taking the kids in august for the last 6 years.True,it is hot but they will get used to it.They may be a bit niggley for a day or so.try to keep your air con on in one room and then at least they can go in for a cool.perhaps have a siesta between 12 and 3 when it is hottest.high factor sun tan cream and usual precautions etc.calis is a great place for kids,its nice for them to have a play on the beach as you watch them with a refreshing drink.i'm sure there will be a park somewhere as well.always a failsafe is the trusty ds guaranteed for a few minutes peace!there is a playpark in fethiye right on the harbour where there are plenty of bars to relax and lots of stalls/shops.our favourite on the harbour is Tadem.have a great time.