Thailand Seasons & Climate

The best season to travel to Thailand is from November to February when temperatures are moderated by dry air blowing cooler. This time of year temperatures in Bangkok and in the south range between 65-85 degrees F with moderate humidity, whereas in the highlands of northern Thailand it can be quite cool in the morning and at night. The weather in Thailand for travel this time of year is pleasant, warm and dry, hence these months are the most popular time to travel to Thailand. During the Christmas-New Year's holiday it's best to book your trip to Thailand 6-12 months in advance to secure the most special boutique accommodations in the best locations.

The summer season from March through June is hot and dry when temperatures reach 100 degrees F and humidity is relatively high at 75%. April is the hottest month of the year. This is the least popular season for traveler to Thailand, although the weather in Thailand is still quite nice along the islands and beaches in the south.

July to October is monsoon season, when the climate of Thailand reaches its highest overall rainfall, humidity averages around 90%, and temperatures hover around 85 degrees F. Days are often sunny for travel in Thailand during monsoon as rain falls more in downpours with some flash-flooding, but the air is cleared and temperatures cooled with the showers. Bangkok can be particularly wet and flooding occurs in concentrated areas.

Travel to the islands and beaches of southern Thailand essentially has two seasons –rainy and dry. Beginning in late November and continuing through April or May you find featuring glorious sunshine without much rain or unbearable heat hanging around the water.

Travelers to Thailand can find sunny beaches any time of year on either one or the other of Thailand’s two coasts which have slightly different rainy seasons. Phuket, Krabi, and the Phi Phi Islands on the Andaman or west coast experience heavy monsoon rains from April to October, while on the Gulf of Thailand or east coast most rain falls between September and December on the beaches and islands around Koh Samui, Koh Phangan, and Koh Tao. While the monsoon on the west coast brings continual rain that causes some disruptions and tourist facilities to close, the east coast storms are more similar to the rainy season in the north with sporadic downpours and mostly sunny days.