For Koh Tao :
No gale warning.
The reliability of the situation is good.
Overcast skies with storms likely in the morning, storms developing in the afternoon. Some showers from late morning. In the evening, skies clearing but continuing risk of storms.
Light showers progressively becoming less frequent. W force 5 becoming force 4 in the middle of the day then WNW. Smooth to slight sea. Low, short swell from NW. Excellent visibility.