For Sumatra SE tips :
No gale warning.
The reliability of the situation is good.
Skies very cloudy, risk of thundery outbreaks during the afternoon. Risk of some spots of rain in the morning, showers late in the day. In the evening, very cloudy with risk of storms.
Light showers progressively becoming less frequent. N force 1 turning WSW force 2 in the middle of the day then NW. Gusts reaching 10 knots in the middle of the day. Slight sea. Low, fairly long swell from SSW. Visibility reduced by mist becoming good in the middle of the day then reduced by mist.