I already have talked about Caorle, a little town close to Venice made by a patchwork of pastels coloured houses and traditional seafood restaurants.
There is also a natural and pure spot of the beach, alongside the mouth of Livenza's river. The sand is pristine, wide and open to people, without an entrance fee. Nevertheless, lifeguards stations are present, as well as characteristic cafes, in which caring and lovely baristas are willing to make a fresh lemonade (from real squeezed lemons) for their customers.
If you are in Venice, you can take a bus to reach Caorle, and, to find this tranquil spot, you have to proceed to the west side until you will just find water and a low wall separating the river from the sea. That is the end of Caorle's west side and where the magic spot is. If you glimpse elegant swans, small boats, clear blue water and water cowboys on water motors, then you are in the right place.
I will suggest you to stay here if you are looking for peace and relax, with friends or family. Caorle is at the top-notch location for top-notch seafood: the range of restaurants is wide and nice.