Relaxing on the sun roof of the boatLocals would say that Koh Tao is always warm, other tourists may feel that it is hot.

Air temperatures rarely drop below 30 degrees, except in the monsoon season, where they can plummet to 28 degrees. Because the sea is never far away, even on hot days a gentle breeze helps cooling of a bit, a plunge in the sea can further alleviate the heat.

Water temperatures normally stay around 27/31 degrees, a perfect temperature to enjoy the under water world and all its colorful inhabitants.