For Ilha grande :
No gale warning.
The reliability of the situation is very good.
Skies changeable to very cloudy. Risk of showers in the morning, possibility of a few spots in the afternoon. In the evening, good clear periods but lots of cloud, too.
No precipitation. SW force 2 in the morning temporarily SSW force 3 in the middle of the day. Rough sea becoming moderate in the middle of the day. Moderate, fairly long swell from SSW. Excellent visibility becoming excellent in the middle of the day.