For Sumatra SE tips :
No gale warning.
The reliability of the situation is good.
Very cloudy with risk of thunderstorms in the morning, predominantly sunny in the afternoon. Light showers progressively dying out in the morning, no precipitation in the afternoon. In the evening, good clear periods but cloud building.
No precipitation. ESE force 3 in the morning temporarily SE force 4 in the middle of the day. Gusts reaching 18 knots in the middle of the day. Moderate sea becoming rough in the evening. Moderate, long swell from SSW. Poor visibility becoming excellent in the middle of the day.