As mentioned in the introduction, a peculiar characteristic of 2D perovskites is their enhanced moisture and even water stability. To date, no studies on the effect of the alkyl chain length on such phenomenon has been performed. To address this issue, we subjected three selected members of the (CnH2n+1NH3)2PbBr4 and (CnH2n+1NH3)2PbI4 series, namely with n = 6, 10, and 16, to two kind of tests. In the first experiment we put the perovskite powdered sample directly in deionized water and we left it for 4 hours under stirring and recovered the material after this time following water evaporation under the hood. On these samples we collected XRD patterns and compare them to the pristine, as-prepared materials. The second test was the determination of the contact angle by using water as solvent as a function of time on thin films samples.