For Koh Tao :
No gale warning.
The reliability of the situation is very good.
Cloud and long sunny periods. Possibility of showers In the evening, changeable skies with risk of storms.
Showers towards the end of the night. SE force 2 in the middle of the day turning WSW in the evening. Gusts reaching 9 knots in the evening. Smooth sea becoming rippled in the evening. Low, short swell from S. Excellent visibility becoming good in the evening.