Ko Tao, a small island in the Gulf of Thailand, boasts a tropical climate with warm temperatures and high humidity year-round. The island experiences a hot, dry season from February to May, a windy and wetter period from June to October, and a wet monsoon season from November to January. Sunshine, lush landscapes, and warm seas make Ko Tao a beach lover’s paradise.
The best times to travel section shows how the months compare for a visit, so you can find the time of year that fits what you want to do.
Background colours of the months:
The colour shows the typical temperature: yellow (hot), green (mild) and blue (cold). How strong the colour is shows the travel season: full colour means high season, soft colour means shoulder season and soft-striped means off season.
Weather symbols:
Each month has one symbol showing what the weather is typically like, such as hot and sunny, freezing or a rainy or snowy season. Use them to quickly spot months that match the weather you want, or to avoid the ones that don't.
Crowdedness:
The people icon shows how busy the place usually is. The more people, the more crowded it gets.
Additional notes:
The grey info boxes point out special things worth knowing, like recurring weather issues or seasonal events.
Ko Tao’s tropical climate keeps temperatures consistently warm, ranging from 29°C in January to 35°C in April. Nights are balmy, rarely dropping below 22–26°C. The island’s weather is shaped by three main seasons. The dry season (February–May) brings the sunniest days, minimal rainfall, and the hottest temperatures of the year, peaking in April. Sea temperatures are inviting, averaging 28–30°C, perfect for swimming and diving. Humidity is high but slightly lower than during the wet season.
The windy season (June–October) sees the arrival of southwest monsoon winds, bringing occasional waves and afternoon showers. While rain is more frequent, sunny intervals are still common, and underwater visibility can be excellent, especially on the east coast. The wet season (November–January) is marked by heavy rainfall, especially in November, when precipitation can exceed 300 mm and rainy days peak at over 20 per month. Thunderstorms are common, but even in the wettest months, rain often falls in short, intense bursts, followed by sunshine. Sunshine hours range from 8 hours per day in the dry season to as low as 5 hours during the wettest months. Winds are generally light to moderate, increasing during storms. Despite the rains, the sea remains warm and suitable for water activities year-round.
| Average climate data for Ko Tao, Thailand | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average water temperature (°C) | 28 | 28 | 29 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 28 | 29 |
| Average daily daylight hours (h) | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 12 |
The best time to visit Ko Tao is from December to April, when weather is warm (29–33°C), sunny, and dry, with calm seas and excellent diving conditions. These months are ideal for beach activities, snorkelling, and festivals, offering the most reliable and comfortable climate for travellers.
The least favourable time is from October to November, when Ko Tao experiences its heaviest rainfall, frequent thunderstorms, and the highest number of rainy days. Outdoor activities, diving, and boat trips may be disrupted, and some services can be limited due to weather conditions.
Ko Tao has a tropical climate with warm temperatures (29–35°C) and high humidity all year. The dry season runs from December to April, while the wettest months are October and November.
The best time to visit Ko Tao is from December to April, when the weather is sunny, dry, and ideal for diving, snorkelling, and beach activities. These months also see the most festivals and events.
Rain is common, especially from October to January, with November being the wettest month. Rain usually falls in short, heavy bursts, and sunny intervals are frequent even in the wet season.
Sea temperatures in Ko Tao range from 28°C in January to 30°C in April and May, making it perfect for swimming, snorkelling, and diving throughout the year.
Yes, diving is possible year-round, but the best visibility is from February to September. November and December may see reduced visibility due to heavy rain and choppy seas.
Pack light, breathable clothes, swimwear, sun cream, a hat, and sunglasses. Bring a rain jacket and waterproof bag for the wet season. Insect repellent and comfortable shoes for hiking are also recommended.
Ko Tao can experience strong winds and tropical storms, especially during the wet season (October–January). While storms are usually brief, they can disrupt outdoor plans and boat schedules.
The month with the highest average water temperature is May (30.1 °C). The month with the lowest average water temperature is January (27.8 °C). Overall, the average water temperature over the whole year is 29.1 °C.
The months with the longest days, so the most daylight, are May, June and July (Average daylight: 12.1 h). The month with the shortest days, so the least daylight, is December (Average daylight: 11 h). Over the whole year there are 11.6 h of daylight per day on average.
