Diving Seasons Thailand – The Gulf of Thailand and the Andaman Sea have opposing seasons.
Andaman Sea – The West Coast of Thailand
This is typically regarded as being November to April. This is considered the dry season and affects the areas in the South and West of Thailand, mainly trips or packages in Phuket, Phi Phi, Krabi, Similan, Hin Daeng, Hin Muang, Richelieu, Burma, Myanmar and Surin.
During this season the weather is generally sunny with an average of 29C/85F. February March are the most popular periods for spotting Whale Sharks. Conditions are generally calm seas, sunny days and excellent diving conditions making it perfect for Liveaboard Thailand trips to the Similans, Myanmar, Phi Phi Islands and Hin Daeng & Hin Muang aboard our liveaboards.
The low season in the Andaman is typically May to October. Whilst the weather and sea temperatures are still warm, diving in the areas of Similan and further north become more unpredictable due to possible high winds, periods of heavy rain and unexpected rough seas. However, diving is still available in other areas of the Andaman Sea in this period, especially in the areas of Phuket, Phi Phi and Krabi. As the Andaman Sea has a large inlet/bay area offering some protection from these unpredictable weather conditions. This allows divers to access these excellent dive sites all year round so even if we cannot take you to the Similan Islands aboard our liveaboards we can still arrange some fantastic diving for you.
Gulf of Thailand
The Gulf of Thailand high season is typically May to October. Again this is considered the dry season with the areas affected being those from Koh Samui, Koh Tao and including the famous dive sites Sail Rock and Chumpon Pinnacle. During this season you can expect also usually calm seas, warm sunny days and water and air temperatures averaging around 29C/85F.
More about Gulf of Thailand Dive Sites
The low season for the Gulf of Thailand is generally November to April, again the water and air temperatures remain around a balmy 29C/85F however possible high winds, periods of rain from 10 minutes to all day and unexpected high seas bring about the “low season” period. There is still diving on offer in this period and often excellent diving however you must be prepared for less than perfect weather conditions should you wish to dive during this time.