If you do a search you should find lots of info on this as it is often raised.

However in a nutshell, yes, you stand a 99% chance of getting a good soaking - if you are "lucky" you could well be plastered in talcum powder that soon dries into a thick crusty face pack!! Until the next bucket of water when it will return to its original form of yucky slimy sludge.

The water throwing sort of follows a trail around the country - so it is in Bangkok, then a few days later in Chiang Mai , then Phuket and Pattaya (or whatever order). It normally starts around the 13th of April and the Pattaya day is normally somewhere around the 18th or 19th April.

Yes it does calm down at night a lot but like any "party activity", there are aways a few who do not know when to stop and go a bit later.

Most Pattaya residents vacate the city during this time - lots of patience and good natured attitude can be required, after being soaked and dusted the umteenth time. A great experience once but not too be repeated too often.