Extended Access has been running since 2017 and has been very successful and popular with people who use the libraries.
Currently Westbury-on-Trym, Stockwood and St. George are open almost 65 hours a week, but from July 7, they will also be accessible between 1-5pm every Sunday.
This change is happening as a direct result of the community engagement work on libraries that took place across the city from January to March.
The Central Library is also open on Sunday afternoons, and staff based there will be able to support anyone using library services via telephone if they need help.
Anyone who wants to use one of these libraries in Extended Access time just needs to visit during staffed hours to have a short induction with the library staff.
All the normal facilities are available, with the self-service kiosks and free public computers connected and ready to be used.
Deputy Mayor, Councillor Asher Craig, said: “As part of our ongoing commitment to the future of Bristol’s libraries, Extended Access is helping residents access services more independently when they need to. Customers are able to use libraries to borrow books, go online, and study at the times when we have fewer staff on duty.
“We are beginning to implement ideas that were put forward as part of the engagement process, and we will continue to work with Friends groups and other community organisations to help prioritise our actions.”
The library team are also considering rolling out Extended Access to further libraries once the current self-service kiosks have been replaced. The kiosks were introduced seven years ago and are now reaching the end of their life.