SeasonMapKo Tao (Koh Tao) weather in March
Thailand
March in Ko Tao: hot, a little rain, with muggy air — one of the best months to visit.
#1 of 12 months in Ko Tao · #109 of 1383 destinations to visit in March · comfort 91/100 (tier S)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Ko Tao in March
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 — March
| Daytime high | 27°C / 81°F | 🥵 hot |
|---|---|---|
| Nighttime low | 26°C / 79°F | |
| Feels like (high) | 32°C / 90°F | |
| Sea temperature | 29°C / 84°F | ♨️ bath-warm |
| Rainfall | 34 mm / 1.3 in | 🌦 some rain |
| Rainy days | 7 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 22°C / 72°F | |
| Sunshine | 10.9 h/day | |
| Daylight | 12.1 h | |
| Wind | 20 km/h / 12 mph | |
| Air quality (US AQI) | 59 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Ko Tao in March
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.
BusyClear water, dive season, school holidays in 2 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).
Best weatherKo Tao's weather peaks February–April, best around March.
March includes Whale shark season.
Best weatherFair weatherToughest weather
What's on in Ko Tao in March
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Clear water, dive season
1 Feb – 30 Sep · usuallyDry seasonCrowdedThe settled half of the Gulf year, when the boats to Chumphon Pinnacle and Sail Rock go out every day and the training courses run back to back. Visibility is at its best on the shoulder months.
- Nature
Whale shark season
15 Mar – 31 May · usuallyDive seasonThey turn up on the pinnacles for a few weeks in the spring, and again in a smaller run around September and October. Sightings get posted on the dive-shop boards within the hour; nobody guarantees them.
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 March — FAQ
- Is March a good time to visit Ko Tao?
- March in Ko Tao: hot, a little rain, with muggy air — one of the best months to visit. It ranks #1 of 12 months for Ko Tao on SeasonMap's comfort score (91/100).
- What is the weather like in Ko Tao in March?
- In March, Ko Tao averages a daily high of 27.2°C and a low of 26.1°C, with about 34.2 mm of rain over roughly 6.5 rainy days.
- What is the air quality in Ko Tao in March?
- Ko Tao has a mean US Air Quality Index of about 59 in March.
Other months in Ko Tao
Compare Ko Tao in March
Warmer or cooler than Ko Tao in March
Similar destinations in Southeast Asia — March
Within 300 km: Khao Sok's Rafflesia in bloom around 1 Jan – 15 Mar, and Khao Lak's Manta and whale shark season around 1 Feb – 5 May.