Su Adası is east of Tavşan Adası of the southeast of Sisam Strait., The entry of the bay is from the South of Tavşan Adası,  Tavşan Islet is connected to shore by rocky reefs; its shoreline is sheer rocks. The bay between Su Islet and the mainland provides adequate shelter from northerly winds. There are sufficient depths at the entry ( 7 – 9 meters) it shelves ashore gradually. The eastern side of the bay is shallow. The bottom is weed—make sure that your anchor is well dug in. Strong breezes will send swell into the bay.

Su Adası is a layover anchorage for those cruising towards Dilek Boğazı (Strait).