We collected information about Bangkok Post Offices Opening Hours for you. Follow the liks to find out everything about Bangkok Post Offices Opening Hours.
https://thaiportal.ru/en/thailand-post-offices-in-bangkok/
https://www.thailandguru.com/thailand-postal-office-couriers.html
The central post office is located near the river on thanon Charoen Krung (about halfway between its intersections with thanon Surawong and thanon Si Phraya). It runs longer hours and is also open on the weekend. Monday-Friday 8am to 8pm, and weekends 8am to 1pm. (You can also make international phone calls there, which is open 24 hours.)
http://thailandbreeze.com/thai-post-office.html
Normal business hours are Monday to Friday 8:30 a.m. – 4:30 p.m. There is no lunch break. The opening hours for weekends and public holidays are 9:00 a.m. – 12:00 p.m. However, some post offices are closed on Sundays.
https://aseannow.com/topic/207056-post-office-opening-hours-weekend/
I believe that Thai Post Offices are open 9:00 a.m. - 12:00 noon on Saturdays, and 8:30 a.m.- 4:30 p.m. weekdays. I do confess though to not having been in one in the late afternoon for a few years now. Link to post.
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