8· 1 review
Acaiá Cave & Ilha Grande Lagoons Boat Tour
If you're in Ilha Grande, don't miss the opportunity to take a tour around the Acaiá Cave and its main lagoons. You'll fall in love with its landscapes!
7 h
from US$ 46
Short answer
In October, Ilha Grande averages highs of 28 °C (82 °F) and lows of 21 °C (70 °F), with about 105 mm of rain spread over roughly 13 days. October is one of the rainiest months of the year, so bring a rain jacket and keep some indoor activities in mind. Crowds tend to be moderate this month.
Climate · INMET (updated 2026)
Temperature
28 / 21 °C
high / low
Rain
105 mm
13 days
Daylight
12h38
sunset at 18:01
Crowds
Moderate
1 public holiday
What to expect in Ilha Grande in October
Editor's tip
October is spring in Ilha Grande. In Brazil the seasons are the reverse of those in the Northern Hemisphere. Temperatures are pleasant, with highs of 28 °C (82 °F) and nights that still call for a light jacket. Crowds sit somewhere in the middle, with peaks on public holidays. Outside those dates, you can enjoy the place at an easy pace and spend less. It rains fairly often, so keep an indoor plan handy for gray days.
Myllena Vieira · Editor at VisiteCrowds
Crowd level: moderate
Moderate crowds, with peaks on public holidays. Outside those dates, you can enjoy the place at a calmer pace.
Prices
Rates: moderate
Moderate prices outside public holidays, which push rates and crowds up.
Tours and tickets
Things to do in Ilha Grande in October
Where to stay
Hotels in Ilha Grande
In October, demand in Ilha Grande is moderate: most hotels have room, but public holidays fill them up. Compare rates and book a few weeks ahead.
Rates change with the dates: confirm the price on Booking.com.
What happens in October
No major fixed festivals in October, but public holidays (Our Lady of Aparecida) bring more people to the destination.
Public holidays in October: Our Lady of Aparecida (12/10). Expect more people and higher prices around these dates.
What to pack in October
Light clothing for the day · highs of 28 °C (82 °F) Rain jacket or umbrella · 13 days of rain in the month Sunscreen and sunglasses · strong sun on the tours Quick-dry clothing · humidity of 81% Comfortable walking shoes · you will be on foot much of the day
Looking for better weather?
Where the weather is good in October
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