For Koh Tao :
No gale warning.
The reliability of the situation is good.
Skies changeable with risk of thundery outbreaks developing. Risk of some spots of rain in the morning, possibility of showers in the afternoon. In the evening, skies clearing but continuing risk of storms.
Possibility of showers W force 4 turning SW in the middle of the day then W force 5. Smooth to slight sea. Low, short swell from WSW. Excellent visibility.