The Surin Islands enjoy a tropical climate. It is typically high in both temperature and humidity with yearly mosoons. Awareness of Thailand's seasonal weather patterns is essential for the traveller so as to make for a comfortable and enjoyable trip.
Thailand annual weather cycle
In a typical year the monsoon rains peter out in October and the high season for tourism begins. November till April sees the most accommodating weather for guests to Thailand. During these months the humidity has been cleared from the preceding monsoon. There is now low rainfall, sunny skies and the temperature flirts with 30°C
Savage showers & sublime sunsets
During April and May the heat intensifies and the humidity rises. April and May are particularly warm with average daytime temperatures breaching 35°C. Clear skies are still common, but as the weeks pass the clouds start to bubble up during the late morning and afternoon rain becomes more frequent. These showers eliminate the humidity and break up the clouds leading to stunning sunsets.
It's raining - it's pouring
June to September sees the full onset of the monsoon. Often the mornings begin clear and sunny. However, even before the heat has chance to build up, dark clouds are rolling in accompanied with strong gusts of wind. Wild, exciting storms are commonplace with heavy precipitation. Whereas this weather is not good for tourism, the locals seem indifferent, enjoying the cool respite before the cycle starts over.
Regional climactic conditions across Thailand
Although the seasonal gyrations remain roughly the same across the entire nation, there are of course regional differences based upon location within the country and local geography.
Chiang Mai in the north is cooler than Hat Yai in the south. The winds coming off the sea in Phuket are stronger than the broken down gusts that occur in big city Bangkok.