cottim:Obrigado Conce,
my problem was september, not august, though!
What they told me was that in September the temperature is a little higher ... But I still think that with the wind felt after the dive I would go wiht 2 suits (one of 2 and one of 5 milimiters) and there I would decide which to wear ... But that´s my opinion ... as I said before some people dove very well in a 0.5 milimiters suit .