Koh Tao weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Excellent
Best time to visit: December – April
What is the weather like in Koh Tao in December?
In December, Koh Tao is warm: daytime highs average 27 °C, and even at night it stays warm at around 26 °C. The sea averages 27.9 °C – lovely and warm for swimming. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 134 mm in total. The air is often humid and muggy. All in all, December is an excellent month for a holiday in Koh Tao.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 68 | 81 | 88 |
| Day | 27° | 27° | 27° |
| Night | 26° | 26° | 26° |
| Sea | 29° | 28° | 28° |
| Sun | 5 h | 6 h | 7 h |
| Rain days | 20 | 11 | 8 |
More details for December
- Daylight
- 11 h 32 min06:30 – 18:02
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 25 km/haverage daily peakAll months
- Cloud cover
- 64 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+7Asia/Bangkok
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %57 %
- Few rainy daysweight 20 %47 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in December
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Koh Tao in December: quick answers
Is Koh Tao hot in December?
Warm rather than hot: in December, daytime highs in Koh Tao average 27 °C and nights cool to about 26 °C.
Can you swim in Koh Tao in December?
Yes. In December the sea averages 27.9 °C – lovely and warm for swimming.
Does it rain much in Koh Tao in December?
Rain is frequent, with about 11 rainy days and 134 mm in total.
Koh Tao month by month
The whole year in Koh TaoAll destinations: ThailandWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences