When is the best time to dive in Koh Tao

Mujer buceando en Tailandia

Waking up to the sound of the sea, observing the impressive views, and diving into the crystalline waters are some of the things that are waiting for you in Koh Tao. Diving in Koh Tao is like entering a new and stunning marine world. Here, you can find a wonderful variety of marine life, from colorful coral reefs to fish of all shapes and sizes. Besides, the diving conditions are perfect for almost the whole year. For that reason, Koh Tao, the diving island, is the perfect paradise for diving lovers.

However, it is important to consider the weather because it can be variable and can influence diving conditions. In this blog, we present to you how the climate is in Koh Tao, its seasons, and the weather conditions. Are you ready?


The climate in Koh Tao changes as the marine life changes, but the temperature is always between 25 and 35 degrees with high humidity. The island has two main weather seasons: the dry season and the rainy season. 

Even though the rainy season cannot be the time to visit the island, it will surprise you to know that it is also a perfect moment for diving. This is because when it rains, the drops clean the water, which, when you are underwater, creates a fantastic sensation. Moreover, the rain attracts many marine animals to be around. For that reason, the climate can have a significant impact on diving conditions. 


Thailand, especially the Gulf of Thailand, where Koh Tao island, is well known to have wonderful diving conditions during the whole year. Even there are some periods when it is more favorable to explore the marine world on the island.

DRY SEASON (diving season)

In general, this season starts from January to September.  During this period, the diving conditions are exceptional, with extraordinary underwater visibility that can reach up to 30 meters. Additionally, the water temperature is warm, which makes diving comfortable using light neoprene. Moreover, it is a fantastic time to do snorkel in Koh Tao at its different beaches, where you can see baby sharks, turtles, and a thousand different fish near the seashore. 


It is from March to May, when the weather conditions continue to be good for diving.  During these months, the water temperature is also warm, between 28 and 34 degrees.  The visibility underwater continues to be wonderful, but it can be affected by having more plankton in the water. This season is ideal for divers who want to see whale sharks. These giant animals used to live near the Koh Tao waters, following plankton to eat. 

LOW SEASON (rainy season)

Koh Tao has its monsoon season from September to the end of November. During this time, it can be intense raining and very variable climate conditions. But the temperature never goes down to 25 degrees. Despite this, the island remains a viable diving destination during these months.

The underwater visibility can be reduced, varying from 5 to 20 meters, due to runoff and particles suspended in the water. Moreover, this season benefits the island because there are fewer people and the prices are cheaper.  


Diving in Koh Tao is a wonderful and richness experience. In our diving courses always we focus on the security mainly. From beginner courses like try scuba diving, to open water or in advance diver, we teach you how works all the diving equipment, so that later you just have to enjoy and dive. Here are some tips for diving in different weather conditions in Koh Tao.

  1. Revise the water conditions before every immersion. In our web we update every day the climate conditions. This will help you to prepare for your immersion and be safe underwater. 
  2. Prepare yourself for being underwater. For example, if the underwater visibility is with rain, consider to dive in areas where the marine life is abundant. Our diving instructors will help to guide you. 
  3. Dive always with someone. This is the most important rule in diving! This will give you security in your immersion and a better experience of sharing. 
charla de cursos de buceo

From our diving center in Koh Tao recommend you the best points on the island to dive, depending on the day. Because we always keep in mind the climate conditions and the state of the sea. Take a look at all our diving courses that you can do in your visit to Koh Tao. Also, remember that we give you the possibility to obtain a diving certificate in Koh Tao. It is the cheapest diving course in the world! 

Do not forget about exploring all the things Koh Tao can offer you, from beautiful beaches to adventure experiences, with amazing views. So, what are you waiting for? Pack your things, especially bikinis, and go to Koh Tao to dive and see spectacular marine animals!