For Sumatra SE tips :
No gale warning.
The reliability of the situation is good.
Fair weather with mostly clear skies. In the evening, skies with few clouds.
E force 3 in the morning turning SE in the evening. Gusts reaching 19 knots from the middle of the day. Moderate sea. Low, fairly long swell from SSW. Poor visibility becoming excellent in the middle of the day then good.