How long does it take to recover from hydroceles on both sides at the same time?

1 - 3 weeks. Depends upon size of hydroceles and age of patient. Young prepubertal boys should recover within a week. Recovery can be much longer after puberty and depends upon size of hydroceles and postoperative activity and use or not of a compression dressing.
A week or two. For a transcrotal hydrocele repair in an adult, the usual recovery is 1-2 weeks. However, if the wound becomes infected or a hematoma develops, then the recovery can take much much longer. Ice packs, minimal activity and scrotal support will decrease recovery time somewhat.