São Sebastião weather in October

In October, São Sebastião sees average daytime highs of 30°C and overnight lows near 22°C, with 33 mm of rain across 9.1 wet days and about 12.2 hours of daylight. It is the 7th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 30% of the time in October, and the air most often feels muggy.

Daylight stretches from about 12 h 06 min at the start of October to 12 h 24 min by month's end. Set against the rest of the year, October is São Sebastião's 2nd-clearest and 3rd-windiest month. For the whole year in context, see São Sebastião's year-round climate.

Daytime high
30°
7th warmest
Overnight low
22°
5th coldest
Rainfall
33 mm
9.1 wet days
Daylight
12 h 12 min
5:05 AM – 5:18 PM
Cloud cover
52%
2nd clearest
Wind
13 km/h
3rd windiest
Solar energy
5.93 kWh/m²
Travel score
5.4
out of 10

São Sebastião is human settlement in Brazil.

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

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical October day in São Sebastião reaches about 30°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, October runs about 2°C warmer than September and about 1°C cooler than November.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12922
22922
32922
42922
52922
62922
72922
82922
92922
102922
112922
122922
132922
142922
152922
162922
173022
183022
193022
203022
213022
223022
233022
243022
253022
263022
273022
283022
293022
303022
313022

How October really feels in São Sebastião

Once humidity and wind are folded in, October averages 11 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
11
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in October is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

São Sebastião weather by month

How October compares with the rest of the year at a glance. October is the 7th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 24°4110.912.54.2
Feb31° / 24°4511.112.34.1
Mar31° / 24°5613.312.14.1
Apr30° / 23°7516.611.84.1
May29° / 22°9819.711.64.5
Jun27° / 21°9121.511.44.8
Jul26° / 21°8622.211.54.9
Aug27° / 20°6019.411.75.3
Sep28° / 21°4213.911.95.7
Oct30° / 22°339.112.25.4
Nov31° / 23°266.412.54.9
Dec32° / 23°226.512.64.6

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 39% of October, with mostly cloudy or overcast conditions the remaining 31%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17624
27525
37426
47426
57228
67129
77030
86931
96931
106733
116733
126733
136733
146733
156634
166634
176634
186634
196634
206634
216733
226733
236733
246832
256832
266832
276832
286931
296931
306832
316832

Chance of precipitation in October

Any precipitation

São Sebastião gets around 33 mm of rain over 9.1 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 30% and peaks near 33% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
132
232
332
432
532
632
732
833
933
1033
1133
1233
1333
1433
1532
1632
1731
1831
1930
2030
2129
2228
2327
2427
2526
2626
2726
2826
2925
3025
3125

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the muggy band about 69% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
117623
217524
317524
417425
517425
617326
717326
817326
917227
1017227
1117227
1217128
1317128
1407129
1507129
1607030
1706931
1806931
1906832
2006733
2106733
2206634
2306535
2406535
2506436
2606436
2706337
2806337
2906337
3006238
3106238

Wind in October

Winds average 13 km/h in October.

Across October, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 12 h 06 min at the start of October to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over October. Sunrise moves from 5:13 AM to 4:59 AM, and sunset from 5:18 PM to 5:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.15:135:18
212.15:125:18
312.15:115:18
412.15:115:18
512.15:105:18
612.15:105:18
712.15:095:18
812.25:095:18
912.25:085:18
1012.25:075:18
1112.25:075:18
1212.25:065:18
1312.25:065:18
1412.25:055:18
1512.25:055:18
1612.25:055:18
1712.25:045:18
1812.25:045:18
1912.35:035:18
2012.35:035:18
2112.35:025:18
2212.35:025:19
2312.35:025:19
2412.35:015:19
2512.35:015:19
2612.35:015:19
2712.35:005:19
2812.35:005:20
2912.35:005:20
3012.35:005:20
3112.44:595:20

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 5.93 kWh/m².

For context, solar energy here swings from a low near 3.88 kWh/m² to a high of 6.28 kWh/m² in December across the year — October's 5.93 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
196.0Bright
206.0Bright
216.0Intense
226.0Intense
236.0Intense
246.1Intense
256.1Intense
266.1Intense
276.1Intense
286.1Intense
296.2Intense
306.2Intense
316.2Intense
Planning a trip in October

Hazard calendar for São Sebastião

In seasonPeak

None of São Sebastião's seasonal hazards are active in October. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

São Sebastião's rainy season runs February–August, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is October a good time to visit São Sebastião?

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

5.4
Sightseeing
2nd-best month of the year
7.1
Beach & pool
2nd-best month of the year

October is a reasonable time to visit São Sebastião for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for São Sebastião in October

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

In October, São Sebastião sees daytime highs around 30°C and nights near 22°C. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near São Sebastião in October

The nearest coast averages about 26°C in October — 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.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Tropical
Mar28Tropical
Apr29Tropical
May28Warm
Jun27Warm
Jul26Warm
Aug26Warm
Sep26Warm
Oct26Warm
Nov27Warm
Dec27Warm

UV index in São Sebastião in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 12 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 22UV 14Jun 23UV 9
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar14Extreme
Apr13Extreme
May10Extreme
Jun9Very high
Jul9Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov13Extreme
Dec12Extreme
Location & terrain

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.

3 km
123 m
16 km
299 m
80 km
909 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
October weather nearby: Junqueiro 9.0 km · Feira Grande 14 km · Teotônio Vilela 22 km · Limoeiro de Anadia 22 km · Lagoa da Canoa 23 km · Arapiraca 23 km · Igreja Nova 24 km · Campo Alegre 28 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 (-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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).