Latest NewsThailand NewsTravel & Tourism Guide for best time to visit Thailand beaches By Pattaya Mail March 17, 2022 0 1743 Share on Facebook Tweet on Twitter tweet Infographics. Here is a Guide for The Best Time to Visit Thailand Beaches. Down south, the east and west coasts get the rainy season at different times. So, if one side has monsoon, then go to the other side. (TAT) The Gulf of Thailand provinces (Koh Samui).