For Mentawai Islands :
No gale warning.
The reliability of the situation is good.
Skies very cloudy, risk of some thundery outbreaks. Risk of showers in the morning, showers late in the day. In the evening, good clear periods but cloud building.
Chance of light rain. E force 2 turning SSW force 1 in the middle of the day then SE force 2. Gusts reaching 7 knots in the evening. Slight sea. Low, fairly long swell from SSW. Visibility reduced by mist becoming good in the middle of the day then poor.