For Mentawai islands :
No gale warning.
The reliability of the situation is good.
Good clear periods alternating with cloudy spells, sometimes dense. Risk of some spots of rain in the morning, no precipitation in the afternoon. In the evening, very cloudy.
No precipitation. N force 2 turning ENE in the middle of the day then S force 1. Gusts reaching 8 knots in the morning. Slight sea. Low, fairly long swell from S. Poor visibility becoming excellent in the middle of the day then good.