Just like most of the islands in Thailand, Koh Phangan sees its peak tourist season during the months of December to March. While the temperature is warm all year round, it is during these months that it is not humid and there is a little coolness in the air. It is the best time to enjoy all the water activities, be it adventure sports, snorkelling, kayaking and everything else. This period also marks the busiest months, which means it will be crowded everywhere. This is the biggest drawback for those seeking a quiet and peaceful vacation. That is why, there is no best time that suits everyone. People who want cool weather without the hustle should come after mid-November. This is the time when the rain almost stops and the weather is warm and cool without the crowds. However, most people come to Koh Phangan because of the moon party and choose the travel time according to that. If you are with family, you should skip the dates that are related to these parties these as the island will be full of people who like to go wild!