For Sumatra SE tips :
No gale warning.
The reliability of the situation is very good.
Lots of good clear periods. No precipitation. In the evening, skies with few clouds covering over progressively.
Risk of showers in the early hours. SE force 3 in the middle of the day becoming ESE force 2 in the evening. Gusts reaching 13 knots in the middle of the day. Slight sea. Low, fairly long swell from S. Excellent visibility becoming poor in the evening.