Porto Seguro weather in September

In September, Porto Seguro sees average daytime highs of 25°C and overnight lows near 22°C, with 51 mm of rain across 11.1 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 45% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Porto Seguro's 3rd-clearest and 3rd-windiest month. For the whole year in context, see Porto Seguro's year-round climate.

Daytime high
25°
10th warmest
Overnight low
22°
3rd coldest
Rainfall
51 mm
11.1 wet days
Daylight
11 h 54 min
5:33 AM – 5:28 PM
Cloud cover
48%
3rd clearest
Wind
15 km/h
3rd windiest
Solar energy
5.22 kWh/m²
Travel score
6.8
out of 10

Porto Seguro is human settlement in Brazil.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 25°C through the month.

A typical September day in Porto Seguro reaches about 25°C in the afternoon and slips back to 22°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 26°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12522
22522
32522
42522
52522
62522
72522
82522
92522
102522
112522
122522
132522
142522
152522
162522
172522
182522
192522
202522
212522
222522
232522
242622
252622
262623
272623
282623
292623
302623

How September really feels in Porto Seguro

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Porto Seguro weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 25°7014.812.95.7
Feb28° / 25°6414.712.65.2
Mar28° / 25°11318.812.15.0
Apr27° / 24°11518.811.65.2
May26° / 23°9616.811.25.8
Jun25° / 22°7315.6116.1
Jul25° / 22°6716.711.16.2
Aug25° / 22°5312.811.46.7
Sep25° / 22°5111.111.96.8
Oct26° / 23°9613.112.46.3
Nov27° / 24°15815.612.85.6
Dec27° / 24°11013.9135.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 29% of September, with mostly cloudy or overcast conditions the remaining 26%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17624
27624
37624
47624
57525
67624
77624
87723
97723
107723
117723
127822
137822
147822
157822
167723
177723
187624
197525
207426
217327
227228
237129
247030
256931
266832
276733
286634
296634
306436

Chance of precipitation in September

Any precipitation

Porto Seguro gets around 51 mm of rain over 11.1 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 37% and peaks near 39% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
139
239
339
439
538
638
737
837
936
1036
1135
1235
1335
1435
1535
1635
1735
1835
1935
2036
2136
2236
2337
2437
2537
2637
2737
2837
2937
3037

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 65% of days. Sticky, muggy-or-worse air turns up on roughly 90% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11117315
21117315
31117216
41117216
51117216
61127116
71117117
81117117
91117018
101117018
111116919
121107019
131106920
141106821
15196822
16196723
17186724
18186625
19186526
20186328
21186229
22176230
23176032
24076033
25075835
26075736
27075538
28075439
29065341
30065242

Wind in September

Winds average 15 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over September. Sunrise moves from 5:46 AM to 5:22 AM, and sunset from 5:26 PM to 5:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.75:465:26
211.75:455:26
311.75:445:26
411.75:435:27
511.75:435:27
611.85:425:27
711.85:415:27
811.85:405:27
911.85:395:27
1011.85:385:27
1111.85:385:27
1211.85:375:27
1311.95:365:28
1411.95:355:28
1511.95:345:28
1611.95:335:28
1711.95:325:28
1811.95:325:28
1912.05:315:28
2012.05:305:28
2112.05:295:28
2212.05:285:28
2312.05:275:29
2412.05:275:29
2512.15:265:29
2612.15:255:29
2712.15:245:29
2812.15:235:29
2912.15:225:29
3012.15:225:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.22 kWh/m².

For context, solar energy here swings from a low near 3.76 kWh/m² to a high of 6.46 kWh/m² in January across the year — September's 5.22 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.1Bright
95.1Bright
105.1Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.4Bright
275.4Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Is September a good time to visit Porto Seguro?

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

6.8
Sightseeing
1st-best month of the year
6.2
Beach & pool
1st-best month of the year

September is a reasonable time to visit Porto Seguro for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Porto Seguro in September

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

In September, Porto Seguro sees daytime highs around 25°C and nights near 22°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Porto Seguro in September

The nearest coast averages about 25°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 22 km away) is warmest in April at about 28°C and coldest in August near 25°C.

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

24°26°28°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr28Warm
May27Warm
Jun26Warm
Jul25Warm
Aug25Warm
Sep25Warm
Oct25Warm
Nov26Warm
Dec26Warm

UV index in Porto Seguro in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Porto Seguro peaks around February 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 16UV 15Jun 22UV 7
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar14Extreme
Apr11Extreme
May8Very high
Jun7Very high
Jul7Very high
Aug9Very high
Sep11Extreme
Oct12Extreme
Nov14Extreme
Dec13Extreme
Location & terrain

Where is Porto Seguro?

Porto Seguro sits at 16.4°S, 39.1°W, 4 m above sea level, in Brazil. The nearest listed city is Santa Cruz Cabrália, 20 km away.

Topography around Porto Seguro

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Porto Seguro.

Within 3 km, the terrain around Porto Seguro has only modest variations in elevation — a maximum elevation change of 61 m around an average of 11 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 109 m; within 80 km, large variations in elevation — a maximum elevation change of 761 m.

The land around Porto Seguro is covered by water (46%) within 3 km, water (46%) and trees (38%) within 16 km, and trees (40%), water (33%) and grassland (25%) within 80 km.

3 km
61 m
16 km
109 m
80 km
761 m
treesshrubsgrasslandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Santa Cruz Cabrália 20 km · Itabela 54 km · Eunápolis 56 km · Belmonte 68 km · Guaratinga 78 km · Itamaraju 82 km · Canavieiras 87 km · Prado 101 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 Porto Seguro (-16.4497°, -39.0647°, elevation 4 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).