SeasonMapKo Tao (Koh Tao) weather in December
Thailand
December in Ko Tao: hot, soaked, with muggy air — fine if you can take 13 rainy days.
#9 of 12 months in Ko Tao · #637 of 1383 destinations to visit in December · comfort 73/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Ko Tao in December
Other months in Ko Tao
Ko Tao's forum calls March a good window as the seas calm after the rainy season — flat water and great visibility for diving, with only occasional cloudy days and the odd rain shower rather than a washout. Regulars flag the humidity as climbing as the hot season sets in, though it's not yet the peak heat of April-June.
Add your own note from Ko Tao's card on the map.
Ko Tao climate normals — December
| Daytime high | 26°C / 79°F | 🥵 hot |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 29°C / 84°F | |
| Sea temperature | 29°C / 83°F | ♨️ bath-warm |
| Rainfall | 193 mm / 7.6 in | ⛈ soaked |
| Rainy days | 13 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 22°C / 71°F | |
| Sunshine | 9.4 h/day | |
| Daylight | 11.5 h | |
| Wind | 25 km/h / 16 mph | |
| Air quality (US AQI) | 57 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Ko Tao in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyChristmas and New Year peak, school holidays in 5 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Ko Tao's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherKo Tao's weather peaks February–April, best around March.
Best weatherFair weatherToughest weather
What's on in Ko Tao in December
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Northeast monsoon
15 Oct – 31 Dec · usuallyRiskThe wettest and roughest weeks of the year, when the crossing from Chumphon is cancelled for days at a stretch and the visibility on the dive sites drops. Many shops shut for December.
- Holiday
Christmas and New Year peak
18 Dec – 5 JanChristmas & New YearCrowdedFull and expensive in spite of the weather, and the one time of year the boat can strand you either coming or going. Leave a spare day before any onward flight. Source ↗
Nearby, and something's on
Within 300 km of Ko Tao — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Ko Tao?
Ko Tao in December — FAQ
- Is December a good time to visit Ko Tao?
- December in Ko Tao: hot, soaked, with muggy air — fine if you can take 13 rainy days. It ranks #9 of 12 months for Ko Tao on SeasonMap's comfort score (73/100).
- What is the weather like in Ko Tao in December?
- In December, Ko Tao averages a daily high of 26.3°C and a low of 25.1°C, with about 192.7 mm of rain over roughly 13.4 rainy days.
- What is the air quality in Ko Tao in December?
- Ko Tao has a mean US Air Quality Index of about 57 in December.
Other months in Ko Tao
Compare Ko Tao in December
Warmer or cooler than Ko Tao in December
Similar destinations in Southeast Asia — December
Within 300 km: Khao Sok's Morning mist on Cheow Lan around 1 Nov – 15 Feb, and Khao Lak's Dry season, calm Andaman around 1 Nov – 20 Apr.