Generally, the best time to visit Thailand is from November to April. Not only is this the driest time of year, it is also the warmest. Temperatures are frequently greater than 30 Celcius and long days are characterised by blue skies and sunshine. The high season attracts those looking to soak up glorious weather on the beaches in the south – it is worth noting that good weather conditions can be found across much of the country during this time.
The climate differs between the east and west coastlines. The Andaman coast is hit by the monsoon from May to October with islands such as Krabi, Phuket and Khao Lak receiving heavy rainfall. Koh Samui, along with other islands on the east coast, can be visited from January to September as they are sheltered from the worst of the tropical rains.
The north of the country is affected more considerably by the monsoon receiving greater variations in temperature, even within the popular months of travel from November to April. The cold front can cause temperatures to drop as low as zero during November, but by March temperatures can be higher than the central plains and will continue to rise all the way into May.
In general, the coolest months are December to February and the warmest months are from April to June.
Thailand draws many tourists searching for sunshine during the high season, as well as incorporating some of Thailand’s iconic temples and rice paddies. As a result, it is always advisable to book well in advance if you are hoping to travel during high season, to ensure your accommodation options are not restricted.