Do I need to apply for a 60-day tourist visa before entering Thailand, or is it automatic?

You need to apply for a tourist visa before arriving in Thailand

When going to Thailand for 31 - 60 ( 90 )days, the 60 days touristvisa is the best option.

It is cheaper than visa excempt + 30 days extension.

No need of a onward ticket ( 90 days 1 onward ), if returnticket within 60 days.

It is easier to apply from the comfort of your home.

thaievisa.go.th

If visiting the nearest Thai Embassy website, you may find informations, that make it much easier to apply online.

Not wasting holiday time to find, go to and waiting at a immigration office ( 90 you would need that ).

Then no need to leave Thailand in up to 90 days.

Depends on your passport country. Some require a visa to enter. Many get what’s called a visa exempt entry for 30 days, which can be extended in country once for 30 days.