Beau Vallon weather in September

In September, Beau Vallon sees average daytime highs of 26°C and overnight lows near 25°C, with 124 mm of rain across 15.7 wet days and about 12 hours of daylight. It is the 10th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 28% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Beau Vallon's 7th-clearest and 4th-windiest month. For the whole year in context, see Beau Vallon's year-round climate.

Daytime high
26°
10th warmest
Overnight low
25°
3rd coldest
Rainfall
124 mm
15.7 wet days
Daylight
12 hours
6:13 AM – 6:12 PM
Cloud cover
62%
7th clearest
Wind
25 km/h
4th windiest
Solar energy
5.89 kWh/m²
Travel score
5.7
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical September day in Beau Vallon reaches about 26°C in the afternoon and slips back to 25°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 27°C. Set against its neighbours, September runs on par with August and on par with October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12625
22625
32625
42625
52625
62625
72625
82625
92625
102625
112625
122625
132625
142625
152625
162625
172625
182625
192625
202725
212725
222725
232725
242725
252725
262725
272725
282726
292726
302726

How September really feels in Beau Vallon

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.

Beau Vallon weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 26°22020.212.24.9
Feb28° / 26°12713.112.25.7
Mar28° / 27°10915.1125.4
Apr28° / 27°10816.911.95.0
May28° / 27°1381711.85.2
Jun27° / 26°871411.75.7
Jul26° / 25°5311.111.86.3
Aug26° / 25°6612.911.86.1
Sep26° / 25°12415.7125.7
Oct27° / 26°12715.912.15.8
Nov27° / 26°15317.612.25.4
Dec27° / 26°21123.412.34.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 51%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24357
34357
44357
54357
64357
74456
84456
94357
104357
114357
124357
134555
144654
154654
164753
174753
184852
195050
205149
215248
225347
235446
245545
255644
265743
275842
285941
295941
306040

Chance of precipitation in September

Any precipitation

Beau Vallon gets around 124 mm of rain over 15.7 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 52% and peaks near 54% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
150
251
351
451
552
652
753
853
953
1054
1154
1254
1354
1454
1554
1654
1754
1854
1954
2053
2153
2252
2351
2451
2550
2649
2749
2848
2948
3048

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 93% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
110900
29910
39910
49910
59910
68920
78920
88920
97930
107930
116940
126940
135950
145950
155950
165950
175941
185941
195941
205941
215941
225941
235941
245941
255941
265941
275941
285941
295941
305941

Wind in September

Winds average 25 km/h in September.

Across September, daily wind ranges from about 22 km/h on the calmest days to 27 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
127breezy
227breezy
327breezy
427breezy
527breezy
627breezy
727breezy
826breezy
926breezy
1026breezy
1126breezy
1226breezy
1326breezy
1426breezy
1526breezy
1625breezy
1725breezy
1825breezy
1925breezy
2025breezy
2124breezy
2224breezy
2324breezy
2424breezy
2523breezy
2623breezy
2723breezy
2823breezy
2922breezy
3022breezy

Sunrise & sunset in September

DaylightNight

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

Days grow by about 6 minutes over September. Sunrise moves from 6:21 AM to 6:07 AM, and sunset from 6:15 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:216:15
211.96:206:15
311.96:206:15
411.96:196:15
511.96:196:14
611.96:186:14
711.96:186:14
811.96:176:14
911.96:176:14
1011.96:166:13
1112.06:166:13
1212.06:156:13
1312.06:156:13
1412.06:146:12
1512.06:146:12
1612.06:136:12
1712.06:136:12
1812.06:126:11
1912.06:126:11
2012.06:116:11
2112.06:116:11
2212.06:106:10
2312.06:106:10
2412.06:096:10
2512.06:096:10
2612.06:086:10
2712.06:086:09
2812.06:076:09
2912.06:076:09
3012.06:076:09

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.89 kWh/m².

For context, solar energy here swings from a low near 5.1 kWh/m² to a high of 6.28 kWh/m² in March across the year — September's 5.89 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.9Bright
195.9Bright
205.9Bright
216.0Bright
226.0Bright
236.0Intense
246.0Intense
256.1Intense
266.1Intense
276.1Intense
286.1Intense
296.2Intense
306.2Intense
Planning a trip in September

Hazard calendar for Beau Vallon

In seasonPeak

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

Beau Vallon sits in the South Indian Ocean cyclone belt; the season peaks January–March.

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

Is September a good time to visit Beau Vallon?

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

5.7
Sightseeing
4th-best month of the year
5.6
Beach & pool
9th-best month of the year

September is a reasonable time to visit Beau Vallon for sightseeing.

What to pack for Beau Vallon in September

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

In September, Beau Vallon sees daytime highs around 26°C and nights near 25°C. Pack rain gear. Worth having: light clothes, sun protection and a windbreaker. About 16 days see rain.

rain gearlight clothessun protectiona windbreaker

Sea temperature near Beau Vallon in September

The nearest coast averages about 27°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 April at about 30°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°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb29Tropical
Mar29Tropical
Apr30Tropical
May29Tropical
Jun27Warm
Jul26Warm
Aug26Warm
Sep27Warm
Oct28Warm
Nov28Tropical
Dec28Tropical

UV index in Beau Vallon in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Beau Vallon peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 15UV 15Jun 23UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar16Extreme
Apr14Extreme
May12Extreme
Jun10Extreme
Jul10Extreme
Aug12Extreme
Sep14Extreme
Oct14Extreme
Nov13Extreme
Dec13Extreme
Location & terrain

Where is Beau Vallon?

Beau Vallon sits at 4.6°S, 55.4°E, 0 m above sea level, in Seychelles. The nearest listed city is Victoria, 3.0 km away.

VictoriaTakamaka

Topography around Beau Vallon

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

Within 3 km, the terrain around Beau Vallon has large variations in elevation — a maximum elevation change of 910 m around an average of 226 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 928 m; within 80 km, large variations in elevation — a maximum elevation change of 887 m.

The land around Beau Vallon is covered by trees (71%) and water (22%) within 3 km, water (83%) within 16 km, and water (98%) within 80 km.

3 km
910 m
16 km
928 m
80 km
887 m
treesgrasslandartificial surfaceswater
September weather nearby: Victoria 3.0 km · Takamaka 18 km · Antsiranana 1,090 km · Iharan̈a 1,139 km · Ambilobe 1,183 km · Antsohimbondrona 1,186 km · Sambava 1,218 km · Ambarakaraka 1,222 km

Seychelles travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type G
240 V · 50 Hz
Prices
≈ 54% of US
price level, 2025
GDP per capita
$19,449
2025
Safe drinking water
65%
of population, 2024
Homicide rate
8
per 100k, 2022
Road deaths
11.3
per 100k/yr, 2019
Income group
High
World Bank
Religion
Roman Catholic 76%Protestant 11%other Christian 2%Hindu 2%

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 Beau Vallon (-4.6209°, 55.4301°, elevation 0 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).