Weather in Thailand: Climate, Seasons and Travel Tips

THéo COurant

Travelling around South East Asia

fr-FRen-GB
News

Thailand: Koh Phangan’s Full Moon in September 2025

Thailande - September: A Month of Holidays and Public Celebrations?

Thailand - Events calendar: August 2025 in Thailand, Festivals and main events guides

Weather in Thailand: Climate, Seasons and Travel Tips

Weather in Thailand shapes daily life and strongly influences travel. Understanding the climate and its variations is essential for planning a smooth trip.

Climate in Thailand: General Overview

Thailand has a tropical climate with three main seasons:

  • Cool season (November to February): mild temperatures, clear skies, peak tourist season.
  • Hot season (March to May): very hot, often above 35 °C.
  • Rainy season (June to October): heavy but short downpours, lush green landscapes.

👉 Weather conditions vary by region (mountainous North, Central plains, Andaman coast, Gulf of Thailand).


Average Temperatures in Thailand

  • Bangkok: 25–34 °C depending on the season.
  • Chiang Mai (North): cooler nights (18–22 °C in the cool season).
  • Phuket (Andaman): hot and humid year-round.
  • Koh Samui (Gulf): rainy season shifts later, heaviest in November/December.

Best Time to Visit Thailand Based on Weather

  • December to February: ideal for traveling anywhere, dry and sunny.
  • March to May: great for beaches, though heat can be intense.
  • June to October: rainy season, but fewer tourists and lower prices.

Monthly Weather Guides

Check out our detailed month-by-month guides to plan your trip:


Weather Alerts and Updates

We regularly publish weather alerts on:

  • Heavy rainfall and seasonal flooding.
  • Tropical storms affecting the Gulf of Thailand and the Andaman Sea.
  • Heatwaves and pollution episodes.

Practical Travel Tips for Thailand’s Weather

  • Light clothing in cotton or linen, but pack a rain jacket for the wet season.
  • Sunscreen and hat are must-haves year-round.
  • Check regional forecasts: for example, Koh Samui is sunnier in September than the Andaman coast.
  • Stay flexible: plan indoor activities (museums, temples, spas) in case of heavy showers.