São Sebastião in Winter
In winter (June, July and August), São Sebastião sees average daytime highs around 27°C and overnight lows near 21°C, with 237 mm of rain over about 63 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Across winter, daytime highs hold fairly steady around 27°C. The sky is clear or mostly clear about 21% of the time across winter, and the air most often feels muggy.
Winter is São Sebastião's 2nd-best season to visit on our travel score. For the whole year in context, see São Sebastião's year-round climate.
- Avg daytime high
- 27°C
- coldest season of the year
- Avg overnight low
- 21°C
- Rainfall
- 237 mm
- 63 wet days
- Avg wind
- 10 km/h
- Travel score
- 5.0
- 2nd-best season
- Months
- Jun · Jul · Aug
Temperature in São Sebastião in Winter
Across winter, daytime highs hold fairly steady around 27°C.
A typical winter day in São Sebastião reaches about 27°C and drops to 21°C overnight. The warmest of the three months is June, the coolest August.
How winter really feels in São Sebastião
Once humidity and wind are folded in, winter brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
winter sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
São Sebastião weather by month
How the three winter months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 31° / 24° | 41 | 10.9 | 12.5 | 4.2 |
| Feb | 31° / 24° | 45 | 11.1 | 12.3 | 4.1 |
| Mar | 31° / 24° | 56 | 13.3 | 12.1 | 4.1 |
| Apr | 30° / 23° | 75 | 16.6 | 11.8 | 4.1 |
| May | 29° / 22° | 98 | 19.7 | 11.6 | 4.5 |
| Jun | 27° / 21° | 91 | 21.5 | 11.4 | 4.8 |
| Jul | 26° / 21° | 86 | 22.2 | 11.5 | 4.9 |
| Aug | 27° / 20° | 60 | 19.4 | 11.7 | 5.3 |
| Sep | 28° / 21° | 42 | 13.9 | 11.9 | 5.7 |
| Oct | 30° / 22° | 33 | 9.1 | 12.2 | 5.4 |
| Nov | 31° / 23° | 26 | 6.4 | 12.5 | 4.9 |
| Dec | 32° / 23° | 22 | 6.5 | 12.6 | 4.6 |
Cloud cover in Winter
The sky is clear or mostly clear about 21% of the time across winter.
Chance of precipitation in Winter
São Sebastião gets around 237 mm of rain over 63 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 10 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 11 h 30 min in early June to 11 h 48 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 4.1 kWh/m².
Hazard calendar for São Sebastião
In winter, São Sebastião overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
São Sebastião's rainy season runs February–August, when most of the year's rain falls.
Is winter a good time to visit São Sebastião?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit São Sebastião for sightseeing.
What to pack for São Sebastião in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, São Sebastião sees daytime highs around 27°C and nights near 21°C. Pack light clothes and rain gear. About 63 days see rain.
Sea temperature near São Sebastião in Winter
The nearest coast averages about 26°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 52 km away) is warmest in April at about 29°C and coldest in August near 26°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 28 | 28 | 28 | 29 | 28 | 27 | 26 | 26 | 26 | 26 | 27 | 27 |
| Comfort | Warm | Tropical | Tropical | Tropical | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 28 | Tropical |
| Mar | 28 | Tropical |
| Apr | 29 | Tropical |
| May | 28 | Warm |
| Jun | 27 | Warm |
| Jul | 26 | Warm |
| Aug | 26 | Warm |
| Sep | 26 | Warm |
| Oct | 26 | Warm |
| Nov | 27 | Warm |
| Dec | 27 | Warm |
UV index in São Sebastião in Winter
Clear-sky midday UV across winter averages around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in São Sebastião peaks around February 22 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 9 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 14 | 14 | 13 | 10 | 9 | 9 | 10 | 12 | 12 | 13 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 14 | Extreme |
| Mar | 14 | Extreme |
| Apr | 13 | Extreme |
| May | 10 | Extreme |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 10 | Very high |
| Sep | 12 | Extreme |
| Oct | 12 | Extreme |
| Nov | 13 | Extreme |
| Dec | 12 | Extreme |
Where is São Sebastião?
São Sebastião sits at 9.9°S, 36.6°W, 204 m above sea level, in Brazil. The nearest listed city is Junqueiro, 9.0 km away.
Topography around São Sebastião
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Sebastião.
Within 3 km, the terrain around São Sebastião has only modest variations in elevation — a maximum elevation change of 123 m around an average of 185 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 299 m; within 80 km, large variations in elevation — a maximum elevation change of 909 m.
The land around São Sebastião is covered by grassland (68%) within 3 km, grassland (67%) and cropland (21%) within 16 km, and grassland (56%) within 80 km.
Brazil travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / N
- 127 / 220 V · 60 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $10,713
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 89%
- of population, 2024
- Homicide rate
- 19.3
- per 100k, 2023
- Road deaths
- 16
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 482
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for São Sebastião (-9.9336°, -36.5542°, elevation 204 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.