Groot-Brakrivier weather in September

In September, Groot-Brakrivier sees average daytime highs of 19°C and overnight lows near 11°C, with 36 mm of rain across 6.8 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 19°C through the month. The sky is clear or mostly clear about 44% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 18 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Groot-Brakrivier's 11th-clearest and 6th-windiest month. For the whole year in context, see Groot-Brakrivier's year-round climate.

Daytime high: 19°; 9th warmest
Overnight low: 11°; 4th coldest
Rainfall: 36 mm; 6.8 wet days
Daylight: 11 h 48 min; 6:32 AM – 6:19 PM
Cloud cover: 46%; 11th clearest
Wind: 13 km/h; 6th windiest
Solar energy: 4.86 kWh/m²
Travel score: 6.7; out of 10

Groot-Brakrivier is village in the Western Cape, South Africa.

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

← August Groot-Brakrivier year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 19°C through the month.

A typical September day in Groot-Brakrivier reaches about 19°C in the afternoon and slips back to 11°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 23°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	18	18	18	18	18	18	18	18	18	18	18	18	18	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19
Avg low (°C)	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	12	12	12	12	12	12	12	12	12	12

	Avg high (°C)	Avg low (°C)
1	18	11
2	18	11
3	18	11
4	18	11
5	18	11
6	18	11
7	18	11
8	18	11
9	18	11
10	18	11
11	18	11
12	18	11
13	18	11
14	19	11
15	19	11
16	19	11
17	19	11
18	19	11
19	19	11
20	19	11
21	19	12
22	19	12
23	19	12
24	19	12
25	19	12
26	19	12
27	19	12
28	19	12
29	19	12
30	19	12

Groot-Brakrivier weather by month

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

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	24° / 18°	41	8.3	14	7.7
Feb	24° / 18°	33	7.4	13.3	7.6
Mar	23° / 17°	46	8	12.3	7.6
Apr	21° / 14°	45	6.9	11.2	7.2
May	20° / 12°	41	6	10.3	7.1
Jun	18° / 10°	34	6.4	9.8	6.6
Jul	17° / 9°	36	6.6	10	6.4
Aug	18° / 10°	45	7.3	10.7	6.4
Sep	19° / 11°	36	6.8	11.8	6.7
Oct	20° / 13°	51	7.7	12.9	6.8
Nov	21° / 15°	60	8.4	13.8	7.0
Dec	23° / 16°	39	7.9	14.2	7.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 36%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	68	67	67	67	67	65	65	65	65	64	64	64	64	64	65	65	64	64	64	64	63	63	63	62	62	61	61	61	61	60
Cloudier (%)	32	33	33	33	33	35	35	35	35	36	36	36	36	36	35	35	36	36	36	36	37	37	37	38	38	39	39	39	39	40

	Clearer (%)	Cloudier (%)
1	68	32
2	67	33
3	67	33
4	67	33
5	67	33
6	65	35
7	65	35
8	65	35
9	65	35
10	64	36
11	64	36
12	64	36
13	64	36
14	64	36
15	65	35
16	65	35
17	64	36
18	64	36
19	64	36
20	64	36
21	63	37
22	63	37
23	63	37
24	62	38
25	62	38
26	61	39
27	61	39
28	61	39
29	61	39
30	60	40

Chance of precipitation in September

Any precipitation

Groot-Brakrivier gets around 36 mm of rain over 6.8 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 23% and peaks near 23% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	22	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	22	22	23	23	23	23	23	23	23	23	23	23

	Rain chance (%)
1	22
2	23
3	23
4	23
5	23
6	23
7	23
8	23
9	23
10	23
11	23
12	23
13	23
14	23
15	23
16	23
17	23
18	23
19	22
20	22
21	23
22	23
23	23
24	23
25	23
26	23
27	23
28	23
29	23
30	23

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	97	97	97	97	97	96	96	95	95	94	94	93	92	92	91	91	91	90	90	90	90	90	90	90	89	89	89	88	88	87
Comfortable (%)	3	3	3	3	3	4	4	5	5	6	6	7	8	8	9	9	9	10	10	10	10	10	10	10	11	11	11	12	12	13

	Dry (%)	Comfortable (%)
1	97	3
2	97	3
3	97	3
4	97	3
5	97	3
6	96	4
7	96	4
8	95	5
9	95	5
10	94	6
11	94	6
12	93	7
13	92	8
14	92	8
15	91	9
16	91	9
17	91	9
18	90	10
19	90	10
20	90	10
21	90	10
22	90	10
23	90	10
24	90	10
25	89	11
26	89	11
27	89	11
28	88	12
29	88	12
30	87	13

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	12	12	12	12	12	12	12	12	12	12	12	12	12	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	12	light breeze
2	12	light breeze
3	12	light breeze
4	12	light breeze
5	12	light breeze
6	12	light breeze
7	12	light breeze
8	12	light breeze
9	12	light breeze
10	12	light breeze
11	12	light breeze
12	12	light breeze
13	12	light breeze
14	13	light breeze
15	13	light breeze
16	13	light breeze
17	13	light breeze
18	13	light breeze
19	13	light breeze
20	13	light breeze
21	13	light breeze
22	13	light breeze
23	13	light breeze
24	13	light breeze
25	13	light breeze
26	13	light breeze
27	13	light breeze
28	13	light breeze
29	13	light breeze
30	13	light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 18 min at the start of September to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over September. Sunrise moves from 6:53 AM to 6:11 AM, and sunset from 6:08 PM to 6:29 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	11.3	11.3	11.3	11.4	11.4	11.4	11.5	11.5	11.5	11.6	11.6	11.6	11.7	11.7	11.8	11.8	11.8	11.9	11.9	11.9	12.0	12.0	12.0	12.1	12.1	12.2	12.2	12.2	12.3	12.3
Sunrise (AM)	6:53	6:52	6:50	6:49	6:48	6:46	6:45	6:43	6:42	6:40	6:39	6:38	6:36	6:35	6:33	6:32	6:30	6:29	6:27	6:26	6:24	6:23	6:21	6:20	6:19	6:17	6:16	6:14	6:13	6:11
Sunset (PM)	6:08	6:09	6:10	6:11	6:11	6:12	6:13	6:13	6:14	6:15	6:16	6:16	6:17	6:18	6:18	6:19	6:20	6:21	6:21	6:22	6:23	6:23	6:24	6:25	6:26	6:26	6:27	6:28	6:29	6:29

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.3	6:53	6:08
2	11.3	6:52	6:09
3	11.3	6:50	6:10
4	11.4	6:49	6:11
5	11.4	6:48	6:11
6	11.4	6:46	6:12
7	11.5	6:45	6:13
8	11.5	6:43	6:13
9	11.5	6:42	6:14
10	11.6	6:40	6:15
11	11.6	6:39	6:16
12	11.6	6:38	6:16
13	11.7	6:36	6:17
14	11.7	6:35	6:18
15	11.8	6:33	6:18
16	11.8	6:32	6:19
17	11.8	6:30	6:20
18	11.9	6:29	6:21
19	11.9	6:27	6:21
20	11.9	6:26	6:22
21	12.0	6:24	6:23
22	12.0	6:23	6:23
23	12.0	6:21	6:24
24	12.1	6:20	6:25
25	12.1	6:19	6:26
26	12.2	6:17	6:26
27	12.2	6:16	6:27
28	12.2	6:14	6:28
29	12.3	6:13	6:29
30	12.3	6:11	6:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.86 kWh/m².

For context, solar energy here swings from a low near 2.65 kWh/m² to a high of 7.54 kWh/m² in December across the year — September's 4.86 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	4.3	4.3	4.3	4.4	4.4	4.5	4.5	4.5	4.6	4.6	4.7	4.7	4.8	4.8	4.8	4.9	4.9	5.0	5.0	5.0	5.1	5.1	5.2	5.2	5.2	5.3	5.3	5.3	5.4	5.4
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.3	Bright
2	4.3	Bright
3	4.3	Bright
4	4.4	Bright
5	4.4	Bright
6	4.5	Bright
7	4.5	Bright
8	4.5	Bright
9	4.6	Bright
10	4.6	Bright
11	4.7	Bright
12	4.7	Bright
13	4.8	Bright
14	4.8	Bright
15	4.8	Bright
16	4.9	Bright
17	4.9	Bright
18	5.0	Bright
19	5.0	Bright
20	5.0	Bright
21	5.1	Bright
22	5.1	Bright
23	5.2	Bright
24	5.2	Bright
25	5.2	Bright
26	5.3	Bright
27	5.3	Bright
28	5.3	Bright
29	5.4	Bright
30	5.4	Bright

Planning a trip in September

Is September a good time to visit Groot-Brakrivier?

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

6.7

Sightseeing

9th-best month of the year

2.6

Beach & pool

9th-best month of the year

September is a reasonable time to visit Groot-Brakrivier for sightseeing.

What to pack for Groot-Brakrivier in September

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

In September, Groot-Brakrivier sees daytime highs around 19°C and nights near 11°C. Worth packing: sun protection. About 7 days see rain.

sun protection

Sea temperature near Groot-Brakrivier in September

The nearest coast averages about 17°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 16 km away) is warmest in January at about 21°C and coldest in August near 16°C.

It's comfortable for a long swim from Dec 13 to Mar 19 — about 3.2 months when the water holds above 20°C.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	21	21	20	18	17	17	16	16	17	17	19	20
Comfort	Refreshing	Refreshing	Refreshing	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Refreshing

	Sea temperature (°C)	Comfort
Jan	21	Refreshing
Feb	21	Refreshing
Mar	20	Refreshing
Apr	18	Cool
May	17	Cool
Jun	17	Cool
Jul	16	Cool
Aug	16	Cool
Sep	17	Cool
Oct	17	Cool
Nov	19	Cool
Dec	20	Refreshing

UV index in Groot-Brakrivier in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Groot-Brakrivier peaks around January 14 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	13	11	10	6	4	3	3	4	6	10	11	12
Level	Extreme	Extreme	Very high	High	Moderate	Moderate	Moderate	Moderate	High	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	13	Extreme
Feb	11	Extreme
Mar	10	Very high
Apr	6	High
May	4	Moderate
Jun	3	Moderate
Jul	3	Moderate
Aug	4	Moderate
Sep	6	High
Oct	10	Extreme
Nov	11	Extreme
Dec	12	Extreme

Location & terrain

Where is Groot-Brakrivier?

Groot-Brakrivier sits at 34.0°S, 22.2°E, 23 m above sea level, in South Africa. The nearest listed city is Mossel Bay, 17 km away.

Topography around Groot-Brakrivier

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Groot-Brakrivier.

Within 3 km, the terrain around Groot-Brakrivier has only modest variations in elevation — a maximum elevation change of 198 m around an average of 76 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,438 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,099 m.

The land around Groot-Brakrivier is covered by trees (33%) within 3 km, water (36%) and grassland (21%) within 16 km, and shrubs (32%), water (29%) and grassland (23%) within 80 km.

3 km

198 m

trees 33%

16 km

1,438 m

water 36%

80 km

2,099 m

shrubs 32%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland

← August Groot-Brakrivier year-round climate October →Best places to visit in September

September weather nearby: Mossel Bay 17 km · George 24 km · Oudtshoorn 49 km · Dysselsdorp 56 km · Knysna 76 km · Riversdale 89 km · Plettenberg Bay 106 km · Swellendam 164 km

South Africa travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / M / N; 230 V · 50 Hz
Prices: ≈ 41% of US; price level, 2025
GDP per capita: $6,598; 2025
Happiness: 5.0 / 10; World Happiness, 2025
Safe drinking water: 68%; of population, 2024
Homicide rate: 43.7; per 100k, 2022
Road deaths: 22.2; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Very high; EF EPI 602
Religion

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 Groot-Brakrivier (-34.0437°, 22.2257°, elevation 23 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).

	Avg high (°C)	Avg low (°C)
1	18	11
2	18	11
3	18	11
4	18	11
5	18	11
6	18	11
7	18	11
8	18	11
9	18	11
10	18	11
11	18	11
12	18	11
13	18	11
14	19	11
15	19	11
16	19	11
17	19	11
18	19	11
19	19	11
20	19	11
21	19	12
22	19	12
23	19	12
24	19	12
25	19	12
26	19	12
27	19	12
28	19	12
29	19	12
30	19	12

	Clearer (%)	Cloudier (%)
1	68	32
2	67	33
3	67	33
4	67	33
5	67	33
6	65	35
7	65	35
8	65	35
9	65	35
10	64	36
11	64	36
12	64	36
13	64	36
14	64	36
15	65	35
16	65	35
17	64	36
18	64	36
19	64	36
20	64	36
21	63	37
22	63	37
23	63	37
24	62	38
25	62	38
26	61	39
27	61	39
28	61	39
29	61	39
30	60	40

	Rain chance (%)
1	22
2	23
3	23
4	23
5	23
6	23
7	23
8	23
9	23
10	23
11	23
12	23
13	23
14	23
15	23
16	23
17	23
18	23
19	22
20	22
21	23
22	23
23	23
24	23
25	23
26	23
27	23
28	23
29	23
30	23

	Dry (%)	Comfortable (%)
1	97	3
2	97	3
3	97	3
4	97	3
5	97	3
6	96	4
7	96	4
8	95	5
9	95	5
10	94	6
11	94	6
12	93	7
13	92	8
14	92	8
15	91	9
16	91	9
17	91	9
18	90	10
19	90	10
20	90	10
21	90	10
22	90	10
23	90	10
24	90	10
25	89	11
26	89	11
27	89	11
28	88	12
29	88	12
30	87	13

	Avg high (°C)	Avg low (°C)
1	18	11
2	18	11
3	18	11
4	18	11
5	18	11
6	18	11
7	18	11
8	18	11
9	18	11
10	18	11
11	18	11
12	18	11
13	18	11
14	19	11
15	19	11
16	19	11
17	19	11
18	19	11
19	19	11
20	19	11
21	19	12
22	19	12
23	19	12
24	19	12
25	19	12
26	19	12
27	19	12
28	19	12
29	19	12
30	19	12

	Clearer (%)	Cloudier (%)
1	68	32
2	67	33
3	67	33
4	67	33
5	67	33
6	65	35
7	65	35
8	65	35
9	65	35
10	64	36
11	64	36
12	64	36
13	64	36
14	64	36
15	65	35
16	65	35
17	64	36
18	64	36
19	64	36
20	64	36
21	63	37
22	63	37
23	63	37
24	62	38
25	62	38
26	61	39
27	61	39
28	61	39
29	61	39
30	60	40

	Rain chance (%)
1	22
2	23
3	23
4	23
5	23
6	23
7	23
8	23
9	23
10	23
11	23
12	23
13	23
14	23
15	23
16	23
17	23
18	23
19	22
20	22
21	23
22	23
23	23
24	23
25	23
26	23
27	23
28	23
29	23
30	23

	Dry (%)	Comfortable (%)
1	97	3
2	97	3
3	97	3
4	97	3
5	97	3
6	96	4
7	96	4
8	95	5
9	95	5
10	94	6
11	94	6
12	93	7
13	92	8
14	92	8
15	91	9
16	91	9
17	91	9
18	90	10
19	90	10
20	90	10
21	90	10
22	90	10
23	90	10
24	90	10
25	89	11
26	89	11
27	89	11
28	88	12
29	88	12
30	87	13

	Avg high (°C)	Avg low (°C)
1	18	11
2	18	11
3	18	11
4	18	11
5	18	11
6	18	11
7	18	11
8	18	11
9	18	11
10	18	11
11	18	11
12	18	11
13	18	11
14	19	11
15	19	11
16	19	11
17	19	11
18	19	11
19	19	11
20	19	11
21	19	12
22	19	12
23	19	12
24	19	12
25	19	12
26	19	12
27	19	12
28	19	12
29	19	12
30	19	12

	Clearer (%)	Cloudier (%)
1	68	32
2	67	33
3	67	33
4	67	33
5	67	33
6	65	35
7	65	35
8	65	35
9	65	35
10	64	36
11	64	36
12	64	36
13	64	36
14	64	36
15	65	35
16	65	35
17	64	36
18	64	36
19	64	36
20	64	36
21	63	37
22	63	37
23	63	37
24	62	38
25	62	38
26	61	39
27	61	39
28	61	39
29	61	39
30	60	40

	Rain chance (%)
1	22
2	23
3	23
4	23
5	23
6	23
7	23
8	23
9	23
10	23
11	23
12	23
13	23
14	23
15	23
16	23
17	23
18	23
19	22
20	22
21	23
22	23
23	23
24	23
25	23
26	23
27	23
28	23
29	23
30	23

	Dry (%)	Comfortable (%)
1	97	3
2	97	3
3	97	3
4	97	3
5	97	3
6	96	4
7	96	4
8	95	5
9	95	5
10	94	6
11	94	6
12	93	7
13	92	8
14	92	8
15	91	9
16	91	9
17	91	9
18	90	10
19	90	10
20	90	10
21	90	10
22	90	10
23	90	10
24	90	10
25	89	11
26	89	11
27	89	11
28	88	12
29	88	12
30	87	13