SeasonMapIlha Grande weather by month
Brazil
The best time to visit Ilha Grande is May, July and September — 85/100 in July, 17°C and 7 rainy days. The best season is winter, June to August (83/100 on average).
The worst month is January at 71/100 — warm, soaked, muggy air. See January →
Updated September 2026 · climate normals from ERA5 reanalysis
Planning the wider trip? Best time to visit Brazil →
Ilha Grande, month by month
Comfort score out of 100 for the kind of trip Ilha Grande is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.
| Month | Score | Tier | High | Rain | Sun | Crowds | On |
|---|---|---|---|---|---|---|---|
| JanJanuary | 71 | B | 21°C | 24 d | 10 h | Peak | 3 |
| FebFebruary | 77 | B | 21°C | 21 d | 10 h | Peak | 4 |
| MarMarch | 78 | B | 21°C | 21 d | 10 h | Shoulder | 3 |
| AprApril | 81 | A | 19°C | 15 d | 9 h | Shoulder | 1 |
| MayMay | 84 | A | 18°C | 11 d | 9 h | Busy | 1 |
| JunJune | 84 | A | 17°C | 9 d | 9 h | Shoulder | 1 |
| JulJuly | 85 | A | 17°C | 7 d | 9 h | Busy | 1 |
| AugAugust | 80 | A | 17°C | 10 d | 9 h | Shoulder | 1 |
| SepSeptember | 85 | A | 18°C | 11 d | 10 h | Busy | — |
| OctOctober | 78 | B | 18°C | 20 d | 9 h | Shoulder | — |
| NovNovember | 79 | B | 18°C | 19 d | 10 h | Shoulder | — |
| DecDecember | 77 | B | 20°C | 22 d | 10 h | Peak | 3 |
What's on in Ilha Grande through the year
Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.
Crowds in Ilha Grande in July
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyJuly winter break in Brazil, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet