Red Sea diving in September: is the water too warm?

[rickpreve]

Hello guys, nice to be in this forum!
I have to be in Cairo September 3/4 and could spend about 10-14 days after that diving the Egyptian Red Sea coast from Marsa Alam south.
But... will water temps be so warm that any sharks or other larger critters be very deep that time of the year?
Any comments or suggestions are very welcomed.
Shukran
Ricardo

 

[drbill]

Was there last August and dove many locations including Marsa Alam. Don't even remember seeing a single shark then. Checked my video and stills and not a single image.