Yup, been there (Ali Al Salem) and heard the same, we used to make a joke of it and every time they rang up the desk it was 49.9.
In our little shelter/ shade bit it got over 50, think it was up to 55, but when we were on days we were out in the sun, impossible to avoid, would be surprised if that was under 65 degrees.
We were in tents for the first month as well, and the air con only ran for an hour or two once the sun hit the air con unit, before shutting itself down. Coming back off nights and into the cool tent was ace, until we all woke up in pools of sweat three hours later (it was like a sunny day in a glasto tent x10), and repeated that for about a month. It's funny looking back