Weather in Cha-am
Cha-am is a seaside resort in the Gulf of Thailand so it has a very tropical climate.

Seasons are split in 3:

  1. Hot - March until May
  2. Rainy - June until October
  3. Cool - November until February
Seasons are not exact - due to Global warming!  These are just indications.
The real fact is that Thailand is a great place to visit ALL YEAR ROUND.  The most popular time is December when temperatures are around 25 degrees.