SeasonMapIlha Grande weather in July
Brazil
July in Ilha Grande: nice, a little rain, with muggy air — one of the best months to visit.
#1 of 12 months in Ilha Grande · #475 of 1383 destinations to visit in July · comfort 85/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Ilha Grande in July
Notes from nearby Rio de Janeiro (111 km away)
Ilha Grande doesn't have its own notes for July yet — these are about Rio de Janeiro, close enough to share the season.
It's winter in Rio, and the forum's regulars are clear that means dry and mild rather than cold — sightseeing weather, not beach weather. The water stays cool most of the year regardless, so July doesn't lose much on that front.
Other months in Ilha Grande
Ilha Grande's forum calls June the start of the cooler, drier season — less rain than the summer months, but regulars note it's noticeably cooler for the beach than northern Brazil destinations like Salvador if warmth matters more to you than avoiding crowds. Still one of the better months overall, since the rainier stretch has passed.
Add your own note from Ilha Grande's card on the map.
Ilha Grande climate normals — July
| Daytime high | 17°C / 62°F | 😎 nice |
|---|---|---|
| Nighttime low | 13°C / 55°F | |
| Feels like (high) | 16°C / 61°F | |
| Sea temperature | 22°C / 72°F | 🙂 pleasant |
| Rainfall | 42 mm / 1.6 in | 🌦 some rain |
| Rainy days | 7 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 11°C / 51°F | |
| Sunshine | 9 h/day | |
| Daylight | 10.9 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 52 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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
Best months for Ilha Grande's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherIlha Grande's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in Ilha Grande in July
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Clear water and empty trails
1 May – 31 Aug · usuallyDry seasonThe storms stop, the sea settles and underwater visibility is at its best of the year; the island is quiet enough that half the pousadas take the month off. Cool for swimming by August.
Nearby, and something's on
Within 300 km of Ilha Grande — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Ilha Grande?
Ilha Grande in July — FAQ
- Is July a good time to visit Ilha Grande?
- July in Ilha Grande: nice, a little rain, with muggy air — one of the best months to visit. It ranks #1 of 12 months for Ilha Grande on SeasonMap's comfort score (85/100).
- What is the weather like in Ilha Grande in July?
- In July, Ilha Grande averages a daily high of 16.5°C and a low of 12.9°C, with about 41.7 mm of rain over roughly 6.9 rainy days.
- What is the air quality in Ilha Grande in July?
- Ilha Grande has a mean US Air Quality Index of about 52 in July.
Other months in Ilha Grande
Compare Ilha Grande in July
Warmer or cooler than Ilha Grande in July
Similar destinations in South America — July
Within 300 km: São Paulo's Ipe trees in flower around 1 Jul – 30 Sep, and Rio de Janeiro's Dry season around 15 May – 15 Sep.