My wife, two sons and I went there for swimming in August. If you arrive by car you have to use one of the overpriced parking lots close to Spiaggia dello Schiacchetello. The beach is just a couple of minutes of walking away, at the very end you have to climb down a very littered staircase. Sadly, the beach and water were not that clean either. It's really a shame, because the lagoon is actually a idyllic place, however due to the littering we were not able to enjoy the atmosphere at all.
Without the litter, the lagoon would really be a nice place, however our experience was complety the opposite...