For Koh Samui :
No gale warning.
The reliability of the situation is very good.
Changeable skies with risk of storms. Showers towards the end of the night. In the evening, storms developing.
Heavy showers. W force 3 in the middle of the day becoming WSW force 2 in the evening. Gusts reaching 14 knots in the middle of the day. Smooth sea. Low, short swell from SW. Excellent visibility becoming good in the evening.