September signals a high average temperature and humidity levels. It's pretty cloudy at this time of year with only X hours of daily sunshine breaking through. The average sea temperature is 28C.
Cloudy weather aside, paying a visit to Ra Mountain which rises over the island and highlights magnificent views, is still a great day out. As is travelling from Ban Tai to Thong Nai Pan Beach and strolling round the old Chinese fishing village of Chaloklum.
One of the best places to stay in Ko Phangan is Haadlad Prestige Resort and Spa a luxurious place with a gorgeous beach setting.
Again and Again is a highly regarded Thai eatery and combines delicious Thai food and hospitality to great effect.
Click here for a 14-day forecast for Ko Phangan.