Do UK citizens need a visa for short visits to Thailand in 2025?

Yes

Yes. But remember the visa exemption and visa on arrival time limit is 180 days. After that you cant get a new stamp unless you've been out of country for 30 days. Or you can apply online for a 90 day E-visa.

Phil Ward . . TDAC, not DTAC. It is done in 5 minutes. I already prepared a Word.doc Form with all the required info except the flight number. I only need to copy and paste

All the above comments are correct … for now. That said, sometimes Thailand changes laws, so stay on top of the immigration requirements.

In short, uk citizens are visa exempted for 30 days. (Was temporarily increased to 60, soon back to 30). No visa required.

And complete any immigration requirements pre arrival on line. Sadly no little immigration form - without a pen - are handed out on the plane any more.

I reckon it's as much to do with how long you spend in Thailand on each visit. If you go for say a couple of weeks only several times in a year, I reckon there'll be no problem, but if you try to go several times and max out visas and visa extensions then you may have issues with IO's. In the good old days I used to go several times a year on visa exempt and do many border bounces. Then after years of this I was at a land border entering and when I presented my passport to the IO., I think he got peed off looking for my last exit stamp as my passport for full of them, so he let me back in for 30 days, but Red stamped me. So after that expired I returned to my own country and got a 12 month O multiple entry visa, which unfortunately I believe is not available now.

Yep should be the same again no problem but maybe don't try to keep doing it many times