Long time visitor returning for the summer - shaded sea areas?

HI

I will be spending 3 weeks in Dubai in the summer, 2 will be with family. By family, it's a wife and a 7 year old.

I lived in UAE back in 2010 and I had trips until about 2017 in the summer. However this is the first time I will bring my daughter with us. (this August) (yes I know about the heat and I love it)

We have a half board hotel so not bothered about breakfast or dinner.

What I am asking here is, is there any places which is under shade but it is in the open water? Like shaded beach or similar where we can actually be in the sea?

Also if anyone knows a place for this in AD.

Other suggestions would be welcome too, we are not interested in swimming in pools as we can do that in the hotel during the evening, but I would like to introduce my daughter to open sea swimming. For me, Mamzar beach is my secret spot away from the crowd and I love it, but she will need some shade during the day.