For Koh Samui :
No gale warning.
The reliability of the situation is good.
Good clear periods alternating with cloudy spells, sometimes more dense in the afternoon. Risk of showers in the morning, no precipitation in the afternoon. In the evening, relatively clear skies becoming changeable.
ESE wind force 2 continuing all day. Gusts reaching 10 knots in the evening. Smooth sea. Low, short swell from ESE. Good visibility becoming excellent in the middle of the day then good.