Reference: Fataawa Ramadhaan – Volume 2, Pages 528-529, Fatwa No.497
Fataawa al-Lajnah ad-Daa.imah lil-Buhooth al-`Ilmiyyah wal-Iftaa. – Fatwa No.3738
Question: Is it permissible for the fasting person in Ramadhaan to comfort himself with water after the Zhuhr prayer by taking a shower or bathe in the pool? [Please] benefit us [with a response] and may Allaah reward you with good.
Response: Yes, that is permissible for the fasting person [to do], and his fast is not affected so long as he takes care water does not enter his stomach; It has been authenticated regarding the Prophet (sal-Allaahu ‘alayhi wa sallam) that he would bathe whilst fasting.
And with Allaah lies all the success, and may Allaah send prayers and salutations upon our Prophet Muhammad (sal-Allaahu ‘alayhi wa sallam) and his family and his companions.