São Sebastião weather in July

In July, São Sebastião sees average daytime highs of 22°C and overnight lows near 18°C, with 92 mm of rain across 8.8 wet days and about 10.7 hours of daylight. It is the 11th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 45% of the time in July, and the air most often feels humid.

Daylight stretches from about 10 h 36 min at the start of July to 10 h 54 min by month's end. Set against the rest of the year, July is São Sebastião's 1st-clearest and 5th-windiest month. For the whole year in context, see São Sebastião's year-round climate.

Daytime high
22°
11th warmest
Overnight low
18°
1st coldest
Rainfall
92 mm
8.8 wet days
Daylight
10 h 42 min
7:47 AM – 6:27 PM
Cloud cover
48%
1st clearest
Wind
10 km/h
5th windiest
Solar energy
3.37 kWh/m²
Travel score
7.0
out of 10

São Sebastião is settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical July day in São Sebastião reaches about 22°C in the afternoon and slips back to 18°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 26°C. Set against its neighbours, July runs on par with June and on par with August.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12218
22218
32218
42218
52218
62218
72218
82218
92218
102218
112218
122218
132218
142218
152218
162217
172217
182217
192217
202217
212217
222217
232217
242217
252217
262217
272217
282217
292217
302217
312217

São Sebastião weather by month

How July compares with the rest of the year at a glance. July is the 11th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 24°27722.413.34.6
Feb27° / 24°22819.612.84.7
Mar27° / 23°23620.612.25.0
Apr25° / 22°13013.711.56.2
May23° / 20°11512.110.96.6
Jun23° / 18°829.510.67.0
Jul22° / 18°928.810.77.0
Aug22° / 18°758.911.27.0
Sep22° / 19°13213.711.96.1
Oct23° / 20°14715.212.65.8
Nov24° / 21°18717.513.15.6
Dec26° / 22°21419.213.45.1

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in July, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 11% of July, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25644
35743
45644
55644
65743
75743
85743
95743
105743
115743
125743
135743
145743
155743
165743
175743
185743
195644
205644
215644
225743
235644
245644
255644
265545
275644
285644
295644
305545
315644

Chance of precipitation in July

Any precipitation

São Sebastião gets around 92 mm of rain over 8.8 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 29% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
128
228
328
428
528
628
728
828
929
1029
1129
1229
1329
1429
1529
1629
1729
1829
1929
2029
2129
2229
2329
2429
2529
2629
2729
2829
2929
3029
3130

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the humid band about 60% of days. Sticky, muggy-or-worse air turns up on roughly 14% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15126122
25136121
35136220
45146120
56156019
66166018
76166117
86176116
96186115
107196014
117205914
127206013
137215913
147215913
158225713
168225713
178225713
188225713
198225713
208225713
218215813
228215813
239205813
249205813
259196012
269196012
279186112
289186112
299186112
308186212
318176312

Wind in July

Winds average 10 km/h in July.

Across July, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 10 h 36 min at the start of July to 10 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over July. Sunrise moves from 7:48 AM to 7:42 AM, and sunset from 6:21 PM to 6:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.67:486:21
210.67:496:22
310.67:496:22
410.67:496:22
510.67:496:23
610.67:496:23
710.67:496:24
810.67:486:24
910.67:486:24
1010.67:486:25
1110.67:486:25
1210.67:486:26
1310.67:486:26
1410.67:486:26
1510.77:486:27
1610.77:476:27
1710.77:476:28
1810.77:476:28
1910.77:476:29
2010.77:466:29
2110.77:466:29
2210.77:466:30
2310.87:456:30
2410.87:456:31
2510.87:446:31
2610.87:446:32
2710.87:446:32
2810.87:436:33
2910.87:436:33
3010.97:426:33
3110.97:426:34

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 3.37 kWh/m².

For context, solar energy here swings from a low near 3.22 kWh/m² to a high of 5.9 kWh/m² in December across the year — July's 3.37 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.2Moderate
23.2Moderate
33.2Moderate
43.3Moderate
53.3Moderate
63.3Moderate
73.3Moderate
83.3Moderate
93.3Moderate
103.3Moderate
113.3Moderate
123.3Moderate
133.3Moderate
143.3Moderate
153.3Moderate
163.4Moderate
173.4Moderate
183.4Moderate
193.4Moderate
203.4Moderate
213.4Moderate
223.4Moderate
233.5Moderate
243.5Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.6Moderate
293.6Moderate
303.6Moderate
313.6Moderate
Planning a trip in July

Is July a good time to visit São Sebastião?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.0
Sightseeing
1st-best month of the year
4.8
Beach & pool
7th-best month of the year

July is one of the better times to visit São Sebastião for general sightseeing.

What to pack for São Sebastião in July

From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In July, São Sebastião sees daytime highs around 22°C and nights near 18°C. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near São Sebastião in July

The nearest coast averages about 21°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 25 km away) is warmest in February at about 27°C and coldest in August near 21°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb27Warm
Mar27Warm
Apr26Warm
May24Refreshing
Jun22Refreshing
Jul21Refreshing
Aug21Refreshing
Sep21Refreshing
Oct22Refreshing
Nov23Refreshing
Dec25Warm

UV index in São Sebastião in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in São Sebastião peaks around February 8 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 5 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeFeb 8UV 14Jul 11UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in São Sebastião in July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.

Air quality in São Sebastião is worst in June — around 23 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (November, 13 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 2223 µg/m³Nov 2313 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar13Moderate
Apr14Moderate
May18Moderate
Jun23Moderate
Jul23Moderate
Aug22Moderate
Sep21Moderate
Oct16Moderate
Nov13Moderate
Dec13Moderate
Location & terrain

Where is São Sebastião?

São Sebastião sits at 23.8°S, 45.4°W, 6 m above sea level, in Brazil. The nearest listed city is Ilhabela, 6.0 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 large variations in elevation — a maximum elevation change of 806 m around an average of 181 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,359 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,647 m.

The land around São Sebastião is covered by trees (50%) and water (39%) within 3 km, trees (53%) and water (36%) within 16 km, and water (53%) and trees (33%) within 80 km.

3 km
806 m
16 km
1,359 m
80 km
1,647 m
treesgrasslandartificial surfaceswater
July weather nearby: Ilhabela 6.0 km · Caraguatatuba 16 km · Paraibuna 49 km · Ubatuba 50 km · Salesópolis 52 km · Biritiba Mirim 67 km · Guararema 74 km · Bertioga 75 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
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 (-23.76°, -45.4097°, elevation 6 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).