Balneário Gaivota weather in September

In September, Balneário Gaivota sees average daytime highs of 18°C and overnight lows near 16°C, with 133 mm of rain across 11.5 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 18°C through the month. The sky is clear or mostly clear about 34% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 24 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Balneário Gaivota's 11th-clearest and 2nd-windiest month. For the whole year in context, see Balneário Gaivota's year-round climate.

Daytime high
18°
9th warmest
Overnight low
16°
4th coldest
Rainfall
133 mm
11.5 wet days
Daylight
11 h 48 min
7:18 AM – 7:07 PM
Cloud cover
58%
11th clearest
Wind
20 km/h
2nd windiest
Solar energy
4.33 kWh/m²
Travel score
5.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 18°C through the month.

A typical September day in Balneário Gaivota reaches about 18°C in the afternoon and slips back to 16°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 21°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11816
21816
31816
41816
51816
61816
71816
81816
91816
101816
111816
121816
131816
141816
151816
161816
171816
181816
191816
201916
211916
221916
231917
241917
251917
261917
271917
281917
291917
301917

Balneário Gaivota weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 23°11513.613.76.4
Feb25° / 23°9111.9136.4
Mar24° / 22°9613.312.26.6
Apr23° / 21°901111.36.8
May20° / 18°12210.210.66.5
Jun18° / 16°999.510.26.1
Jul17° / 14°12210.110.35.6
Aug17° / 15°1099.9115.9
Sep18° / 16°13311.511.85.8
Oct20° / 18°14113.812.75.7
Nov22° / 20°10211.213.56.4
Dec23° / 21°9110.913.86.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25446
35347
45347
55248
65149
75149
85050
95050
105050
114951
124951
134951
144852
154852
164852
174951
184852
194852
204852
214852
224852
234654
244654
254555
264456
274456
284357
294357
304357

Chance of precipitation in September

Any precipitation

Balneário Gaivota gets around 133 mm of rain over 11.5 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 39% and peaks near 44% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
132
232
333
433
534
634
735
835
936
1036
1137
1237
1338
1439
1539
1640
1740
1841
1941
2042
2142
2242
2343
2443
2543
2644
2744
2844
2944
3044

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 38% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13135322
23035332
33034342
43034342
53034352
63033352
73033362
83032362
93032372
103032371
113031381
123031391
132930391
142929401
153029401
163028411
173028412
183028402
193028402
203028403
212928403
222928403
232828404
242728404
252728405
262628405
272628406
282528406
292428407
302428408

Wind in September

Winds average 20 km/h in September.

Across September, daily wind ranges from about 19 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1020light breeze
1120light breeze
1220light breeze
1320light breeze
1420light breeze
1520light breeze
1620light breeze
1720light breeze
1820breezy
1920breezy
2020breezy
2120breezy
2220breezy
2320breezy
2420breezy
2520breezy
2620breezy
2720breezy
2820breezy
2920breezy
3020breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 24 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over September. Sunrise moves from 7:36 AM to 7:00 AM, and sunset from 7:00 PM to 7:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:367:00
211.47:357:00
311.47:347:01
411.57:337:01
511.57:327:02
611.57:307:02
711.67:297:03
811.67:287:03
911.67:277:04
1011.67:257:04
1111.77:247:05
1211.77:237:05
1311.77:227:06
1411.87:207:06
1511.87:197:07
1611.87:187:07
1711.97:177:08
1811.97:157:09
1911.97:147:09
2011.97:137:10
2112.07:117:10
2212.07:107:11
2312.07:097:11
2412.17:087:12
2512.17:067:12
2612.17:057:13
2712.27:047:13
2812.27:037:14
2912.27:017:14
3012.27:007:15

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.33 kWh/m².

For context, solar energy here swings from a low near 2.69 kWh/m² to a high of 6.62 kWh/m² in December across the year — September's 4.33 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.1Bright
44.1Bright
54.2Bright
64.2Bright
74.2Bright
84.2Bright
94.2Bright
104.2Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.4Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.6Bright
294.6Bright
304.6Bright
Planning a trip in September

Is September a good time to visit Balneário Gaivota?

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

5.8
Sightseeing
10th-best month of the year
2.1
Beach & pool
10th-best month of the year

September is a reasonable time to visit Balneário Gaivota for sightseeing.

What to pack for Balneário Gaivota in September

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

In September, Balneário Gaivota sees daytime highs around 18°C and nights near 16°C. Worth packing: rain gear. About 12 days see rain.

rain gear

Sea temperature near Balneário Gaivota in September

The nearest coast averages about 18°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 20 km away) is warmest in February at about 25°C and coldest in August near 17°C.

It's comfortable for a long swim from Nov 1 to May 27 — about 6.8 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan24Warm
Feb25Warm
Mar25Warm
Apr23Refreshing
May21Refreshing
Jun19Cool
Jul17Cool
Aug17Cool
Sep18Cool
Oct19Cool
Nov21Refreshing
Dec23Refreshing

UV index in Balneário Gaivota in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Balneário Gaivota peaks around January 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 18UV 13Jun 22UV 4
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar10Extreme
Apr8Very high
May5Moderate
Jun4Moderate
Jul4Moderate
Aug5High
Sep8Very high
Oct9Very high
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Balneário Gaivota?

Balneário Gaivota sits at 29.2°S, 49.6°W, 6 m above sea level, in Brazil. The nearest listed city is Sombrio, 6.0 km away.

Topography around Balneário Gaivota

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

Within 3 km, the terrain around Balneário Gaivota has only modest variations in elevation — a maximum elevation change of 19 m around an average of 5 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 291 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,483 m.

The land around Balneário Gaivota is covered by water (40%) and grassland (28%) within 3 km, water (53%) within 16 km, and trees (34%), water (33%) and grassland (22%) within 80 km.

3 km
19 m
16 km
291 m
80 km
1,483 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Sombrio 6.0 km · Torres 24 km · Balneário Arroio do Silva 25 km · Araranguá 26 km · Forquilhinha 47 km · Balneário Rincão 49 km · Içara 56 km · Criciúma 57 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 Balneário Gaivota (-29.1567°, -49.5794°, 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).