Vũng Tàu weather in September

In September, Vũng Tàu sees average daytime highs of 28°C and overnight lows near 26°C, with 202 mm of rain across 25.5 wet days and about 12.1 hours of daylight. It is the 6th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 6% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 12 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Vũng Tàu's 12th-clearest and 8th-windiest month. For the whole year in context, see Vũng Tàu's year-round climate.

Daytime high
28°
6th warmest
Overnight low
26°
7th coldest
Rainfall
202 mm
25.5 wet days
Daylight
12 h 06 min
5:44 AM – 5:48 PM
Cloud cover
84%
12th clearest
Wind
17 km/h
8th windiest
Solar energy
5.2 kWh/m²
Travel score
3.6
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Vũng Tàu reaches about 28°C in the afternoon and slips back to 26°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, September runs on par with August and on par with October.

24°26°28°30°32°151015202530
Avg high (°C)Avg low (°C)
12826
22826
32826
42826
52826
62826
72826
82826
92826
102826
112826
122826
132826
142826
152826
162826
172826
182826
192826
202826
212826
222826
232826
242826
252826
262826
272826
282826
292826
302826

How September really feels in Vũng Tàu

Once humidity and wind are folded in, September averages 30 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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Vũng Tàu weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 25°19211.57.9
Feb26° / 25°40.911.78.3
Mar27° / 26°122.311.97.9
Apr28° / 27°488.612.26.3
May29° / 27°16422.912.53.8
Jun29° / 27°19025.512.63.4
Jul28° / 26°15925.712.53.6
Aug28° / 26°16024.912.33.7
Sep28° / 26°20225.512.13.6
Oct28° / 26°23225.811.84.0
Nov28° / 26°12713.311.55.7
Dec27° / 25°586.811.46.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 8% of September, with mostly cloudy or overcast conditions the remaining 86%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11684
21585
31585
41585
51585
61486
71486
81486
91486
101387
111387
121387
131387
141387
151387
161387
171387
181486
191486
201486
211486
221486
231486
241486
251486
261486
271486
281486
291486
301585

Chance of precipitation in September

Any precipitation

Vũng Tàu gets around 202 mm of rain over 25.5 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 85% and peaks near 89% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
180
280
381
481
581
682
783
883
984
1084
1185
1285
1386
1486
1586
1686
1786
1886
1986
2086
2186
2287
2387
2487
2587
2688
2788
2888
2989
3089

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 75% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
11882
21981
31981
42080
52080
62179
72179
82278
92278
102377
112377
122476
132476
142575
152575
162575
172575
182575
192575
202575
212575
222674
232773
242773
252872
263070
273169
283367
293466
303664

Wind in September

Winds average 17 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 12 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over September. Sunrise moves from 5:45 AM to 5:43 AM, and sunset from 5:57 PM to 5:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:455:57
212.25:455:57
312.25:455:56
412.25:455:56
512.25:455:55
612.25:455:54
712.15:455:54
812.15:455:53
912.15:455:52
1012.15:455:52
1112.15:455:51
1212.15:455:50
1312.15:455:50
1412.15:445:49
1512.15:445:48
1612.15:445:48
1712.05:445:47
1812.05:445:46
1912.05:445:46
2012.05:445:45
2112.05:445:44
2212.05:445:44
2312.05:445:43
2412.05:445:42
2512.05:445:42
2612.05:445:41
2711.95:445:40
2811.95:435:40
2911.95:435:39
3011.95:435:39

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.2 kWh/m².

For context, solar energy here swings from a low near 4.78 kWh/m² to a high of 6.67 kWh/m² in April across the year — September's 5.2 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
245.1Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
Planning a trip in September

Hazard calendar for Vũng Tàu

In seasonPeak

In September, Vũng Tàu sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Vũng Tàu sits in the Pacific typhoon belt; the season peaks July–October.

Vũng Tàu's rainy season runs May–November, when most of the year's rain falls.

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

Is September a good time to visit Vũng Tàu?

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

3.6
Sightseeing
10th-best month of the year
4.1
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Vũng Tàu.

What to pack for Vũng Tàu in September

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

In September, Vũng Tàu sees daytime highs around 28°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

Sea temperature near Vũng Tàu in September

The nearest coast averages about 29°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in May at about 30°C and coldest in January near 26°C.

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

24°26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar27Warm
Apr29Tropical
May30Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec27Warm

UV index in Vũng Tàu in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Vũng Tàu peaks around March 23 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 21 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 highMar 23UV 13Nov 21UV 9
UV index (midday)Level
Jan11Extreme
Feb12Extreme
Mar13Extreme
Apr13Extreme
May13Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct10Extreme
Nov9Very high
Dec9Very high

Air quality in Vũng Tàu in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Vũng Tàu is worst in October — around 34 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (March, 21 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateOct 1434 µg/m³Mar 1921 µg/m³
PM2.5 (µg/m³)Level
Jan26Moderate
Feb21Moderate
Mar21Moderate
Apr21Moderate
May25Moderate
Jun30Moderate
Jul29Moderate
Aug29Moderate
Sep33Moderate
Oct34Moderate
Nov31Moderate
Dec34Moderate
Location & terrain

Where is Vũng Tàu?

Vũng Tàu sits at 10.3°N, 107.1°E, 10 m above sea level, in Vietnam. The nearest listed city is Ấp Phước Tĩnh, 12 km away.

Topography around Vũng Tàu

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

Within 3 km, the terrain around Vũng Tàu has only modest variations in elevation — a maximum elevation change of 244 m around an average of 15 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 244 m; within 80 km, large variations in elevation — a maximum elevation change of 918 m.

The land around Vũng Tàu is covered by water (46%) and artificial surfaces (35%) within 3 km, water (86%) within 16 km, and water (43%) and trees (30%) within 80 km.

3 km
244 m
16 km
244 m
80 km
918 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
September weather nearby: Ấp Phước Tĩnh 12 km · Cần Giờ 16 km · Xã Long Hải 18 km · Thành Phố Bà Rịa 19 km · Long Diền 21 km · Thị Trấn Đất Đỏ 26 km · Xóm Mỹ Xuân 30 km · Phú Mỹ 32 km

Vietnam travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / C / F
220 V · 50 Hz
Prices
≈ 29% of US
price level, 2025
GDP per capita
$5,066
2025
Happiness
6.4 / 10
World Happiness, 2025
Safe drinking water
59%
of population, 2024
Homicide rate
1.5
per 100k, 2011
Road deaths
30.6
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 500
Religion
none 86%Catholic 6%Buddhist 6%Protestant 1%

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 Vũng Tàu (10.346°, 107.0843°, elevation 10 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).