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 showers in the afternoon. In the evening, good clear periods but cloud building.
No precipitation. WSW force 2 becoming SW force 3 in the middle of the day then SSW. Moderate sea. Moderate, fairly long swell from S. Excellent visibility becoming excellent in the middle of the day.