For Sumatra SE tips :
No gale warning.
The reliability of the situation is good.
Fairly cloudless skies becoming changeable during the morning, sun and storm clouds in the afternoon. Risk of some spots of rain in the morning, possibility of showers in the afternoon. In the evening, changeable skies with risk of storms.
Possibility of showers ENE force 2 in the morning temporarily ESE force 3 in the middle of the day. Gusts reaching 11 knots in the middle of the day. Moderate sea. Moderate, fairly long swell from S. Visibility reduced by mist becoming excellent in the middle of the day then poor.