Smooth lines parallel to the current shoreline could be formed by low waves over time, which were likely driven by winds sweeping in from the west or southwest.

[3] Infrared observations show that the southwest shoreline of the lake receded 9–11 km over four years (2005-2009), evidently due to evaporation during the dry southern hemisphere autumn.

[6] Hydrological runoff models have found evidence for an extensive basin catchment area for the lake, suggesting seasonal rainfall may be responsible for filling liquids in the local depression.

[7] Any waves on the lake are also far smaller than those that would be on a sizable body of liquid water on Earth; their estimated maximum height was less than 3 mm during observations of a radar specular reflection during Cassini's T49 flyover of July 2009.

[5][8] In any case, the apparent presence of a wave-generated beach on the lake's northeast shore suggests that at times considerably higher waves form.