I must give a lot of you some friendly advise. First of all Sharm has there own sun cream it is in a orange fat bottle, you can buy it everywhere, and can be very high factors. We wore factor 30 for all the two weeks, never get red, never peeled, and had a lovely golden brown tan, which didnt disappear after a few week of coming home. I saw a lot of people buying low factors like 6 or 8. That is a disaster, you wouldnt last five mins in the sun. Low factor sun creams are fine if in the UK and it is not to hot, abroad in the med or anywhere hot, you will need a high factor, it doesnt stop you from going brown, but it would make you go red, peel and have to be out of the sun for a few days whilst everyone else is on the beach. I dont get my cream from the uk, buy theirs, it smells nice, isnt greasy, and it tans instantly....
Reguarding water, in the months from April to september temps will be between roughly 100 degrees to 140 degrees, it is a dry heat, but you must drink all the time water. You will collapse if not, especially if you have children with you. We drank bottles and bottles a day, very cheap. Even eating out in the restaurants at night, it was too hot, if you want air-conditioning sit inside although no one does, al-fresco is best.