For Sumatra SE tips :
No gale warning.
The reliability of the situation is good.
Very cloudy with risk of thunderstorms in the morning, skies clearing but storms likely in the afternoon. Risk of showers in the morning, light showers in the afternoon. In the evening, very cloudy with risk of storms.
Showers towards the end of the night. N force 2 in the morning turning W force 3 in the middle of the day. Gusts reaching 15 knots in the middle of the day. Moderate sea becoming slight in the middle of the day. Low, fairly long swell from S. Visibility reduced by mist becoming good in the middle of the day then poor.