Haven't been on a sunday morning tho..shame as i think i would have liked to see the dancing.
It wasn't cool at night while we were there recently but usually it can turn cooler at night this time of year so my advice would be to pack a fleece or a hoody for night just in case. ( it also comes in handy for when you get off the plane after arriving back in good ol' sunny england and the temperature drops 20 degree's

The sea was not cold but again, this may change. I suppose it depends on what you are used to.. sometimes it would be cold when you first get in as you are boiling hot and the hotter you are the colder it feels, but then it warms up as you are used to it. I did find it even more saltier than usual this time and it was quite unpleasant to the taste and stings your eyes even more than usual.
Hope you have a great holiday.....