Start of the wetter season · Weather & things to do
Ilha Grande in October
Little changes in Ilha Grande from September: highs stay near 83°F (28°C), lows near 69°F (20°C), and about 4.7 in (120 mm) of rain falls.
Our comfort score puts it mid-table at 65/100, 7th of 12.
- Avg high
- 83°F (28°C)
- Avg low
- 69°F (20°C)
- Rain
- 4.7 in (120 mm)
- Humidity
- 79%
- Cloud cover
- 72%
- Daylight
- ~12 h 33 min
- Comfort score
- 65/100 · Good
What October feels like
Highs settle around 83°F (28°C), warm enough for short sleeves.
Lows average 69°F (20°C).
With 79% average humidity, it feels muggy.
Expect regular rain: about 4.7 in (120 mm) falls in the month.
Plan around October
October sits mid-table; the best months are June – August.
- Comfort slips from 79/100 in September to 65/100.
- October sits inside the Apr – Jun, Sep – Nov window our Rio, Ilha Grande & Paraty route recommends.
What to pack for October
- Light, breathable clothes83°F afternoons
- Sunscreen, sunglasses and a hatstrong sun this month
- Quick-dry fabrics79% average humidity
- Rain jacket and waterproof shoes4.7 in of rain on average
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Ilha Grande in October
October is good outdoor weather here, so these picks lean toward the open air.
Lagoa Azul
Shallow lagoon between islets with clear water for snorkeling, usually on a boat tour.
Why now October scores 65/100 for comfort, good conditions for being outside.
Pico do Papagaio
982 m peak shaped like a parrot's beak, with a steep forest trail and wide views.
Why now Highs near 83°F and 4.7 in of monthly rain make this an easy outdoor pick.
Lopes Mendes
Long white-sand beach on the ocean side, reached by trail or boat plus a short walk.
Why now One to do outside while the weather is on your side.
Vila do Abraão
The island's main village of sand lanes, pousadas, a white church and boat docks.
Casarão da Ilha
Long-established spot near the pier for drinks and food as the boats come in.
Nearby in October
- Paraty in October~35 mi · highs 89°F, 4.7 in rain · 3°C (6°F) warmer by day, about as wet
- Rio de Janeiro in October~65 mi · highs 79°F, 4.3 in rain · 2°C (4°F) cooler by day, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~438 m to Ilha Grande's ~6 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Ilha Grande in October: quick answers
Is October a good time to visit Ilha Grande?
It's middling, scoring 65/100. The best months are June – August, at up to 89. Expect highs of 83°F (28°C) and 4.7 in (120 mm) of rain. October is inside the Apr – Jun, Sep – Nov window our Rio, Ilha Grande & Paraty route recommends.
How hot is Ilha Grande in October?
Average highs are 83°F (28°C) and average lows 69°F (20°C), making it the 5th-warmest month by daytime highs.
Does it rain a lot in Ilha Grande in October?
Yes: about 4.7 in (120 mm) of rain falls across October on average, the 6th-wettest month of the year. The annual total is about 58.1 in (1475 mm).
What should I pack for Ilha Grande in October?
Bring light, breathable clothes (83°F afternoons), sunscreen, sunglasses and a hat (strong sun this month), quick-dry fabrics (79% average humidity), rain jacket and waterproof shoes (4.7 in of rain on average) and comfortable walking shoes (most places below are best reached on foot or with short walks).
More on Ilha Grande
Routes in season in October
- Rio, Ilha Grande & Paraty Apr – Jun, Sep – Nov
Planning Ilha Grande in October?
Share this October plan with your group, poll everyone on dates and keep the packing list in one place.