Ko Samui Water Temperature

(Today) 2024

30.3°C / 86.6°F

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

Current weather

29°C / 85°F
(heavy intensity rain)
Partly cloudy
Wind
19 mph
Humidity
71%

The measurements for the water temperature in Ko Samui, 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 Ko Samui water temperature derived from many years of historical sea surface temperature data.

Ko Samui average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Ko Samui
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 26.9 27.2 27.5 28.2 28.9 28.9 28.9 28.2 28.2 28 28.1 26.8
Max °C 28.5 28.9 29.9 31.5 31.4 30.7 30.6 30.1 30.1 30.4 30.3 29.6
Min °F 81.1 81.6 82.5 84 85 84.7 84.7 83.5 83.5 83.4 83.5 81.4
Max °F 82.7 83.3 84.9 87.3 87.5 86.5 86.4 85.4 85.4 85.8 85.7 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 81.9°F / 27.7°C.


7 day tide forecast for Ko Samui

MonTueWedThuFriSatSun
  • Low 5:02am
    (0.75m)
  • High 11:25am
    (3.98m)
  • Low 5:42pm
    (0.57m)
  • High 11:54pm
    (3.52m)
  • Low 5:45am
    (0.79m)
  • High 12:07pm
    (3.93m)
  • Low 6:25pm
    (0.6m)
  • High 12:39am
    (3.49m)
  • Low 6:31am
    (0.89m)
  • High 12:52pm
    (3.8m)
  • Low 7:11pm
    (0.69m)
  • High 1:28am
    (3.42m)
  • Low 7:22am
    (1.04m)
  • High 1:39pm
    (3.61m)
  • Low 8:01pm
    (0.82m)
  • High 2:21am
    (3.32m)
  • Low 8:19am
    (1.21m)
  • High 2:33pm
    (3.39m)
  • Low 8:57pm
    (0.97m)
  • High 3:21am
    (3.23m)
  • Low 9:28am
    (1.37m)
  • High 3:34pm
    (3.17m)
  • Low 10:01pm
    (1.1m)
  • High 4:30am
    (3.18m)
  • Low 10:48am
    (1.45m)
  • High 4:47pm
    (3m)
  • Low 11:12pm
    (1.19m)
7 day tide times for Ko Samui

*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.