Climate and average weather of Thailand : Weather is tropical. Temperature is constantly hot ( 23 Celsius degree minimum to 34 Celsius degree maximum) the whole year.
Mid-May to September : rainy, warm, cloudy Southwest monsoon.
November to mid-March : dry, cool, Northeast monsoon.
Southern isthmus always hot and humid.
Due to the protected location in the Phang Nga Bay the island is providing ideal weather conditions throughout the year.
Thirty year records of Meteological Department of Thailand (1961- 1990) collected at Takua Pa weather station indicate that rain is abundant in the Southwest monsoon season from May to October.
The average annual rainfall is 3,560.5 mm. and the average total rain days is 189 days.
The temperature fluctuates between 23 Celsius degree and 32 Celsius degree.
The average relative humidity is 83%.
Weather conditions in the "wet" monsoon are generally surprisingly good. Although you have to expect some rain, this usually comes in short squalls. Prolonged periods of rain are rare.
In this period however, the South western winds are sometimes quite strong and produce a fairly large swell on the open sea, swimming is not recommended during this period.