Koh Tao Water Temperature

(Today) 2025

29.4°C / 85°F

The water will feel unpleasantly warm (stifling). May be a little too warm for any kind of activity, particularly if sunny.

Current weather

28°C / 83°F
(overcast clouds)
Partly cloudy
Wind
16 mph
Humidity
74%

The measurements for the water temperature in Koh Tao, Surat Thani are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.

*Live data may vary from satellite readings for a number of reasons. These include local factors, depth of smapling and time of day.

Water temp by month

Monthly average max / min water temperatures

The graph below shows the range of monthly Koh Tao water temperature derived from many years of historical sea surface temperature data.

Koh Tao average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Koh Tao
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 26.8 27.2 27.5 28.1 28.8 28.7 28.8 28.2 28.1 28.1 28.1 26.8
Max °C 28.4 28.9 30 31.3 31.4 30.8 30.4 30.1 30 30.4 30.2 29.6
Min °F 80.9 81.6 82.5 83.9 84.9 84.5 84.5 83.5 83.3 83.5 83.4 81.4
Max °F 82.5 83.3 85 87.1 87.5 86.6 86.1 85.4 85.2 85.8 85.5 84.2

The warmest water temperature is in May with an average around 86.2°F / 30.1°C. The coldest month is January with an average water temperature of 81.7°F / 27.6°C.

7 day tide forecast for Koh Tao

FriSatSunMonTueWedThu
  • Low 3:58am
    (0.95m)
  • High 10:20am
    (3.8m)
  • Low 4:38pm
    (0.73m)
  • High 10:45pm
    (3.41m)
  • Low 4:35am
    (0.84m)
  • High 10:56am
    (3.9m)
  • Low 5:12pm
    (0.61m)
  • High 11:21pm
    (3.53m)
  • Low 5:13am
    (0.77m)
  • High 11:31am
    (3.95m)
  • Low 5:46pm
    (0.54m)
  • High 11:58pm
    (3.6m)
  • Low 5:50am
    (0.76m)
  • High 12:08pm
    (3.93m)
  • Low 6:22pm
    (0.53m)
  • High 12:37am
    (3.62m)
  • Low 6:30am
    (0.81m)
  • High 12:47pm
    (3.83m)
  • Low 7:00pm
    (0.59m)
  • High 1:18am
    (3.58m)
  • Low 7:14am
    (0.92m)
  • High 1:28pm
    (3.66m)
  • Low 7:42pm
    (0.71m)
  • High 2:03am
    (3.49m)
  • Low 8:02am
    (1.09m)
  • High 2:14pm
    (3.43m)
  • Low 8:28pm
    (0.89m)
7 day tide times for Koh Tao

*These tide times are estimates based on the nearest accurate location (Pulau Besin, Myanmar) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.