On this year May i walk in to bank at Chiang Mai enquire this. Due to recent rule changes and updates, tourist visas are no longer allowed to be used to open a bank account.
You can only do this if you have another type of visa, like an Elite, Retirement, or Student visa. Even that nomad visa not allow as well.

Keep in mind that even with a Student visa, you still need to stay there and check in with immigration every 90 days.

This post has been edited by nash_ph_41: Nov 1 2025, 12:15 PM