For Koh Samui :
No gale warning.
The reliability of the situation is good.
Very cloudy with risk of storms. Light showers progressively becoming less frequent. In the evening, changeable skies with risk of storms.
Showers. ESE wind force 3 from the middle of the day. Gusts reaching 11 knots. Smooth to slight sea. Low, short swell from ESE. Excellent visibility becoming good in the evening.