Tovster:Is it too hot to go in the middle of the summer?
On the opposite! If you are a true Nitrogen Junkie, you'd prefer the hottest season, as it will encourage you to get in the water and dive more!
And seriously- if August is the month you can come- then August be it. Heat is tolerable, water temp is so fine that you may not need any suit at all (no weigths, hurrah! ) or just a thin skin protection.