Account management series and log-in access to the PSN website will be unavailable from 4pm until 00.01am GMT today.
Users who wish to play online during this period are recommended to sign into PSN before the maintenance begins.
It has been added that all Trophies unlocked during this period will be reinstated on user profiles once the service is back online.
It has been suggested that the downtime will see the return of the PlayStation store after an internal memo stated it would return later today.
Yesterday, it was revealed that Sony experienced the second biggest loss in the company's history following the Japanese earthquake and attack on PSN.
Access to PlayStation Network services, including online multiplayer, was restored for multiple regions last week.