The best time for Khaolak and the Andaman Sea is from November to April. November is the coolest month of the year with day temperatures of 28 - 30ºC, the nightly temperature is regularly 5 - 7 degrees lower.
The temperatures are slowly raising from November until May, in January, you can expect temperatures of 30 - 33ºC, in April the temperatures will climb up to 35 - 37ºC and occasionally downpours might occur.
The monsoon season lasts from May through to October with temperatures slowly declining to their lowest level in November. During this period, the sea is rough and swimming is not recommended. Watch out for the red flag shown on most beaches and exercise additional care when playing in the waves. While many diving schools at Khaolak will close down due to a lack of customers, diving will be available on Phuket, Koh Phi Phi and Krabi.
