Hiya
Being a complete Turkeyphile, and having been many many times and at different times of the year, I can say without reservation that July and August are usually the hottest months to go there, that's why we always go now in May and again in September. May is slightly cooler and for me, the best month. My hubby, is a complete sun worshipper, and the heat really doesn't bother him at all, although, the last time we went in August (5 years ago) it got too much for him....................(wuss)lol
Advice to you would be, well, it's obvious, but you would be amazed at how often sooooooooooooooo many people suffer from dehydration, and blame it on food, it is because they haven't taken enough of the clear liquid (I mean water, not Voddie) too late if you feel thirsty, honest. If you are staying AI,water is on tap 24/7 either in the water coolers, or bottled in ice buckets or fridges, just grab what you need, and you do need a lot. If you staying any other board, then it is so cheap to buy, and everywhere sells it, large and small bottles.
Keep out the sun between 11 and 3, dip in the pools or sea every chance you get, although be careful, cos the sun will get ya. Wear loose cotton cover ups, (T shirts, kaftans etc) and use gallons of sun cream. Take plenty with you, because it is expensive in Turkey, and the shops in the hotels sell at premium rates. Also take plenty of after sun, and if you have the mini bar in your room, store in there to keep it cool.
Buy Autan repellant spray or cream to ward off any biting pests...............And nivea chapstick is brill for lips.
I take a small plant spray bottle with me, and fill it with 3 parts water and 1 part lavender water, keeps you cool and you smell mighty fine too.
All in all, a cool lager or 3 is always good, sitting in the sun, but, too much alcohol is the main reason lots of people become ill.
Just enjoy your holiday, believe me you will have a wonderful time, just take care in the sun.
Take care