Middle Lagoon, previously known as Tanja Lagoon, is an Intermittently Closed and Open Lagoon (ICOL). Ninety percent of the time it is closed to the sea. Occasionally after periods of heavy rain the sandbar is breached and the lagoon drains out into the ocean. It then becomes tidal for a time until the sandbar is reformed by the waves depositing sand. The lagoon refills with high tide wave surges and rainfall. This filling proces can happen over night or over several years!
These events radically transform the views of the lagoon landscape that can be seen from the tents. While the lagoon is tidal, water activities are restricted to periods of higher tidal variation as shallower areas like in front of the tents are exposed until the bar closes and the lagoon fills once again. Swimming at the lagoon mouth on the incoming tide is glorious at these times.