Bel Air Rivière Sèche weather in September

In September, Bel Air Rivière Sèche sees average daytime highs of 23°C and overnight lows near 20°C, with 34 mm of rain across 10.9 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 38% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Bel Air Rivière Sèche's 3rd-clearest and 4th-windiest month. For the whole year in context, see Bel Air Rivière Sèche's year-round climate.

Daytime high
23°
10th warmest
Overnight low
20°
3rd coldest
Rainfall
34 mm
10.9 wet days
Daylight
11 h 54 min
6:07 AM – 6:00 PM
Cloud cover
46%
3rd clearest
Wind
22 km/h
4th windiest
Solar energy
5.65 kWh/m²
Travel score
7.0
out of 10

Bel Air Rivière Sèche is human settlement in Mauritius.

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 23°C through the month.

A typical September day in Bel Air Rivière Sèche reaches about 23°C in the afternoon and slips back to 20°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 24°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

15°18°20°23°25°151015202530
Avg high (°C)Avg low (°C)
12320
22320
32320
42320
52320
62320
72320
82320
92320
102320
112320
122320
132320
142320
152320
162320
172320
182320
192320
202320
212320
222320
232320
242320
252320
262320
272420
282420
292420
302420

Bel Air Rivière Sèche weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°19624.213.14.4
Feb28° / 25°18323.212.74.1
Mar27° / 24°15623.112.14.6
Apr26° / 23°9119.511.65.3
May25° / 22°6214.211.16.5
Jun23° / 21°3310.510.87.1
Jul23° / 20°3612.410.96.7
Aug23° / 20°3710.811.36.8
Sep23° / 20°3410.911.97.0
Oct24° / 21°329.612.57.2
Nov26° / 22°4812.2136.5
Dec27° / 23°10218.213.25.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 40% of September, with mostly cloudy or overcast conditions the remaining 22%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17921
27921
37921
47921
57921
67822
77822
87822
97822
107822
117624
127624
137624
147525
157525
167525
177525
187624
197723
207723
217822
227822
237822
247822
258020
268020
278020
288119
298119
308020

Chance of precipitation in September

Any precipitation

Bel Air Rivière Sèche gets around 34 mm of rain over 10.9 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 36% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
136
236
336
436
536
636
736
835
935
1035
1135
1235
1335
1435
1535
1636
1736
1836
1936
2036
2136
2236
2336
2436
2536
2635
2735
2835
2934
3034

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 57% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14295611
24305511
33305512
43295612
53295612
63295612
73295612
83295513
93285613
103285613
113285613
123285514
133275614
143275614
153265714
163265714
173255715
183245815
193235816
203225817
213215818
223205918
233205819
243195820
253185920
263185821
272185822
282175823
292175724
302175625

Wind in September

Winds average 22 km/h in September.

Across September, daily wind ranges from about 22 km/h on the calmest days to 23 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
123breezy
223breezy
323breezy
423breezy
523breezy
623breezy
723breezy
823breezy
923breezy
1023breezy
1122breezy
1222breezy
1322breezy
1422breezy
1522breezy
1622breezy
1722breezy
1822breezy
1922breezy
2022breezy
2122breezy
2222breezy
2322breezy
2422breezy
2522breezy
2622breezy
2722breezy
2822breezy
2922breezy
3022breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 36 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 36 minutes over September. Sunrise moves from 6:21 AM to 5:53 AM, and sunset from 5:57 PM to 6:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:215:57
211.66:205:57
311.66:195:57
411.76:185:57
511.76:175:57
611.76:165:58
711.76:155:58
811.76:145:58
911.76:135:58
1011.86:135:59
1111.86:125:59
1211.86:115:59
1311.86:105:59
1411.86:095:59
1511.96:086:00
1611.96:076:00
1711.96:066:00
1811.96:056:00
1911.96:046:01
2012.06:036:01
2112.06:026:01
2212.06:016:01
2312.06:006:01
2412.05:596:02
2512.15:586:02
2612.15:576:02
2712.15:566:02
2812.15:556:03
2912.15:546:03
3012.25:536:03

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.65 kWh/m².

For context, solar energy here swings from a low near 3.82 kWh/m² to a high of 7.22 kWh/m² in December across the year — September's 5.65 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.3Bright
55.3Bright
65.3Bright
75.4Bright
85.4Bright
95.4Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.6Bright
155.6Bright
165.6Bright
175.7Bright
185.7Bright
195.7Bright
205.8Bright
215.8Bright
225.8Bright
235.9Bright
245.9Bright
256.0Bright
266.0Intense
276.0Intense
286.1Intense
296.1Intense
306.2Intense
Planning a trip in September

Hazard calendar for Bel Air Rivière Sèche

In seasonPeak

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

Bel Air Rivière Sèche sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Bel Air Rivière Sèche's monsoon runs December–April, when most of the year's rain falls.

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

Is September a good time to visit Bel Air Rivière Sèche?

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

7.0
Sightseeing
3rd-best month of the year
5.4
Beach & pool
6th-best month of the year

September is one of the better times to visit Bel Air Rivière Sèche for general sightseeing.

What to pack for Bel Air Rivière Sèche in September

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

In September, Bel Air Rivière Sèche sees daytime highs around 23°C and nights near 20°C. Worth packing: light clothes, rain gear, sun protection and a windbreaker. About 11 days see rain.

light clothesrain gearsun protectiona windbreaker

Sea temperature near Bel Air Rivière Sèche in September

The nearest coast averages about 23°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 18 km away) is warmest in February at about 28°C and coldest in August near 23°C.

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

22°24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb28Warm
Mar28Warm
Apr27Warm
May26Warm
Jun25Warm
Jul24Refreshing
Aug23Refreshing
Sep23Refreshing
Oct24Refreshing
Nov25Warm
Dec27Warm

UV index in Bel Air Rivière Sèche 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 Bel Air Rivière Sèche peaks around January 17 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 17UV 16Jun 23UV 6
UV index (midday)Level
Jan16Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May8Very high
Jun6High
Jul7High
Aug9Very high
Sep11Extreme
Oct12Extreme
Nov13Extreme
Dec14Extreme
Location & terrain

Where is Bel Air Rivière Sèche?

Bel Air Rivière Sèche sits at 20.3°S, 57.7°E, 78 m above sea level, in Mauritius. The nearest listed city is Centre de Flacq, 8.0 km away.

Centre de FlacqMahébourgPlaine MagnienRose-BelleSaint PierreCurepipePamplemoussesLe Hochet

Topography around Bel Air Rivière Sèche

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bel Air Rivière Sèche.

Within 3 km, the terrain around Bel Air Rivière Sèche has significant variations in elevation — a maximum elevation change of 318 m around an average of 76 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 572 m; within 80 km, large variations in elevation — a maximum elevation change of 786 m.

The land around Bel Air Rivière Sèche is covered by cropland (40%), trees (33%) and grassland (21%) within 3 km, water (43%) and trees (34%) within 16 km, and water (85%) within 80 km.

3 km
318 m
16 km
572 m
80 km
786 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Centre de Flacq 8.0 km · Mahébourg 18 km · Plaine Magnien 21 km · Rose-Belle 22 km · Saint Pierre 23 km · Curepipe 24 km · Pamplemousses 25 km · Le Hochet 26 km

Mauritius travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E / G
230 V · 50 Hz
Prices
≈ 39% of US
price level, 2025
GDP per capita
$12,991
2025
Happiness
5.9 / 10
World Happiness, 2025
Homicide rate
2.3
per 100k, 2022
Road deaths
12.2
per 100k/yr, 2019
Income group
Upper middle
World Bank
Religion
Hindu 49%Roman Catholic 26%Muslim 17%other Christian 6%

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 Bel Air Rivière Sèche (-20.2578°, 57.7498°, elevation 78 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).