April is the hottest month in Koh Tao with an average temperature of 29°C (84°F) and the coldest is January at 26°C (79°F) with the most daily sunshine hours at 8 in April. The wettest month is November with an average of 463mm of rain. The best month to swim in the sea is in April when the average sea temperature is 30°C (86°F).
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Sunrise 06:32
Sunset 18:05
Sunrise 06:32
Sunset 18:05