@Sue ********
- my understanding is (and based on the tourist visas I’ve had), once your visa is approved, you have 90 days to enter Thailand on that visa. Your visa is then valid for 60 days from the day you enter. So you CAN apply for a tourist visa up to 90 days before, but as Stuart mentions, the turn around time of visa processing is usually very quick, so there is no need to apply so far in advance. A few weeks in advance of travel is usually more than enough. Maybe this helps clarify?