For Ilha Grande :
No gale warning.
The reliability of the situation is very good.
Cloud and long sunny periods. No precipitation in the morning, possibility of showers in late afternoon. In the evening, good clear periods but lots of cloud, too.
Possibility of showers SW force 1 becoming SSW force 2 in the middle of the day then NNE. Gusts reaching 9 knots in the evening. Slight sea. Low, short swell from SSE. Poor visibility temporarily in the middle of the day.