Îlet à Eau is an uninhabited islet in the commune of Le Robert. It lies to the northwest of Rats Islet, to which it is attached by an inlet at low tide. It is densely wooded.
It owes its name to the presence of a well whose brackish waters were once said to be miraculous.
There are 13 dwellings, all of them second homes.
It is possible to visit it via the various excursion companies offering tours of the islets of Robert.
Îlet à Eau is not a protected islet.