So Pattaya in May ?

[Moses]

And humid all the time or does it lower at night when going out ?
I hear Pattaya has a (small) breeze of wind from the sea that helps... ?

You will feel breeze on the beach and it helps... but in city you will feel hot air from walls and pavement, smell from sewage system... Bangkok is 10 times worst at that time than Pattaya is, but still Aprill-May isn't the best time for sure... +37C in shadow? easy...

Pattaya weather records:

Highest Temperature 37.7 °C at 2:19 PM on 21 April 2015
Highest Dew Point 30.6 °C at 1:45 PM on 05 May 2021
Highest Apparent Temperature 45.6 °C at 12:19 PM on 06 May 2020
Highest Heat Index 55.4 °C at 1:45 PM on 05 May 2021
Highest Humidity 100 % at 8:23 PM on 24 May 2012