For Koh Tao :
No gale warning.
The reliability of the situation is good.
Very cloudy skies with short clear spells. The risk of seeing rain will remain low. In the evening, very cloudy.
Chance of light rain. WSW wind force 4 continuing all day. Gusts reaching 21 knots in the evening. Slight sea. Low, short swell from SE. Excellent visibility.