The weather on the southern peninsula and beaches is very nice with lots of sunshine and average temperatures in the high 20s Celcius (the average water temperature is a pleasant 28°C). Beach lovers can enjoy the sun on both of the southern coasts, from Phuket to Koh Samui to Krabi. Tha...
With the onset of the monsoon in May temperatures drop slightly and cloudier conditions persist through to October in the north, and right into December in the south particularly on Gulf of Thailand coast to the south of Koh Samui. However this east coast also gets less rain than the west ...