Swellendam weather in July

In July, Swellendam sees average daytime highs of 18°C and overnight lows near 6°C, with 33 mm of rain across 6 wet days and about 10 hours of daylight. It is the 12th-warmest and 6th-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 54% of the time in July, and the air most often feels dry.

Daylight stretches from about 9 h 48 min at the start of July to 10 h 18 min by month's end. Set against the rest of the year, July is Swellendam's 3rd-clearest and 9th-windiest month. For the whole year in context, see Swellendam's year-round climate.

Daytime high: 18°; 12th warmest
Overnight low: 6°; 1st coldest
Rainfall: 33 mm; 6 wet days
Daylight: 9 h 54 min; 7:46 AM – 5:42 PM
Cloud cover: 38%; 3rd clearest
Wind: 9 km/h; 9th windiest
Solar energy: 2.85 kWh/m²
Travel score: 6.8; out of 10

Swellendam is town in Western Cape, South Africa.

Founded: 1746

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

← June Swellendam year-round climate August →Best places to visit in July

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

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

A typical July day in Swellendam reaches about 18°C in the afternoon and slips back to 6°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 24°C. Set against its neighbours, July runs on par with June and about 1°C cooler than August.

	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	31
Avg high (°C)	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18
Avg low (°C)	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6

	Avg high (°C)	Avg low (°C)
1	18	6
2	18	6
3	18	6
4	18	6
5	18	6
6	18	6
7	18	6
8	18	6
9	18	6
10	18	6
11	18	6
12	18	6
13	18	6
14	18	6
15	18	6
16	18	6
17	18	6
18	18	6
19	18	6
20	18	6
21	18	6
22	18	6
23	18	6
24	18	6
25	18	6
26	18	6
27	18	6
28	18	6
29	18	6
30	18	6
31	18	6

Swellendam weather by month

How July compares with the rest of the year at a glance. July is the 12th-warmest and 6th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	28° / 16°	28	5.1	14	7.0
Feb	28° / 16°	23	5.3	13.3	7.0
Mar	27° / 15°	35	6	12.3	7.5
Apr	24° / 12°	37	6.1	11.2	7.7
May	21° / 9°	30	5.4	10.3	7.5
Jun	18° / 7°	31	6.1	9.8	6.9
Jul	18° / 6°	33	6	10	6.8
Aug	19° / 7°	33	6.5	10.7	6.9
Sep	21° / 9°	24	5.7	11.8	7.3
Oct	23° / 11°	39	5.5	12.9	7.8
Nov	25° / 13°	40	5.8	13.8	7.7
Dec	27° / 15°	29	5.4	14.2	7.4

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 18% of July, with mostly cloudy or overcast conditions the remaining 29%.

	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	31
Clearer (%)	75	75	75	75	74	74	73	72	72	71	71	70	70	69	70	70	70	69	69	69	69	69	71	71	71	71	71	71	72	72	72
Cloudier (%)	25	25	25	25	26	26	27	28	28	29	29	30	30	31	30	30	30	31	31	31	31	31	29	29	29	29	29	29	28	28	28

	Clearer (%)	Cloudier (%)
1	75	25
2	75	25
3	75	25
4	75	25
5	74	26
6	74	26
7	73	27
8	72	28
9	72	28
10	71	29
11	71	29
12	70	30
13	70	30
14	69	31
15	70	30
16	70	30
17	70	30
18	69	31
19	69	31
20	69	31
21	69	31
22	69	31
23	71	29
24	71	29
25	71	29
26	71	29
27	71	29
28	71	29
29	72	28
30	72	28
31	72	28

Chance of precipitation in July

Any precipitation

Swellendam gets around 33 mm of rain over 6 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 19% and peaks near 21% 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	31
Rain chance (%)	18	18	18	18	18	18	19	19	19	19	20	20	20	20	20	21	21	21	21	21	21	20	20	20	20	19	19	19	19	19	19

	Rain chance (%)
1	18
2	18
3	18
4	18
5	18
6	18
7	19
8	19
9	19
10	19
11	20
12	20
13	20
14	20
15	20
16	21
17	21
18	21
19	21
20	21
21	21
22	20
23	20
24	20
25	20
26	19
27	19
28	19
29	19
30	19
31	19

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the dry band about 100% 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	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in July

Winds average 9 km/h in July.

Across July, daily wind ranges from about 9 km/h on the calmest days to 9 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	31
Wind speed (km/h)	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	9	calm
2	9	calm
3	9	calm
4	9	calm
5	9	calm
6	9	calm
7	9	calm
8	9	calm
9	9	calm
10	9	calm
11	9	calm
12	9	calm
13	9	calm
14	9	calm
15	9	calm
16	9	calm
17	9	calm
18	9	calm
19	9	calm
20	9	calm
21	9	calm
22	9	calm
23	9	calm
24	9	calm
25	9	calm
26	9	calm
27	9	calm
28	9	calm
29	9	calm
30	9	calm
31	9	calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 9 h 48 min at the start of July to 10 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over July. Sunrise moves from 7:49 AM to 7:36 AM, and sunset from 5:34 PM to 5:52 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	31
Daylight (h)	9.8	9.8	9.8	9.8	9.8	9.8	9.8	9.8	9.8	9.8	9.9	9.9	9.9	9.9	9.9	9.9	10.0	10.0	10.0	10.0	10.0	10.1	10.1	10.1	10.1	10.1	10.2	10.2	10.2	10.2	10.3
Sunrise (AM)	7:49	7:49	7:49	7:49	7:49	7:48	7:48	7:48	7:48	7:48	7:47	7:47	7:47	7:46	7:46	7:46	7:45	7:45	7:44	7:44	7:43	7:43	7:42	7:42	7:41	7:40	7:40	7:39	7:38	7:37	7:36
Sunset (PM)	5:34	5:35	5:35	5:36	5:36	5:36	5:37	5:37	5:38	5:39	5:39	5:40	5:40	5:41	5:41	5:42	5:43	5:43	5:44	5:45	5:45	5:46	5:47	5:47	5:48	5:49	5:49	5:50	5:51	5:51	5:52

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.8	7:49	5:34
2	9.8	7:49	5:35
3	9.8	7:49	5:35
4	9.8	7:49	5:36
5	9.8	7:49	5:36
6	9.8	7:48	5:36
7	9.8	7:48	5:37
8	9.8	7:48	5:37
9	9.8	7:48	5:38
10	9.8	7:48	5:39
11	9.9	7:47	5:39
12	9.9	7:47	5:40
13	9.9	7:47	5:40
14	9.9	7:46	5:41
15	9.9	7:46	5:41
16	9.9	7:46	5:42
17	10.0	7:45	5:43
18	10.0	7:45	5:43
19	10.0	7:44	5:44
20	10.0	7:44	5:45
21	10.0	7:43	5:45
22	10.1	7:43	5:46
23	10.1	7:42	5:47
24	10.1	7:42	5:47
25	10.1	7:41	5:48
26	10.1	7:40	5:49
27	10.2	7:40	5:49
28	10.2	7:39	5:50
29	10.2	7:38	5:51
30	10.2	7:37	5:51
31	10.3	7:36	5:52

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 2.85 kWh/m².

For context, solar energy here swings from a low near 2.64 kWh/m² to a high of 7.53 kWh/m² in December across the year — July's 2.85 kWh/m² sits near the bottom.

	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	31
Solar energy (kWh/m²)	2.7	2.7	2.7	2.7	2.7	2.7	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.9	2.9	2.9	2.9	2.9	2.9	3.0	3.0	3.0	3.0	3.1	3.1	3.1	3.2
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	2.7	Moderate
2	2.7	Moderate
3	2.7	Moderate
4	2.7	Moderate
5	2.7	Moderate
6	2.7	Moderate
7	2.8	Moderate
8	2.8	Moderate
9	2.8	Moderate
10	2.8	Moderate
11	2.8	Moderate
12	2.8	Moderate
13	2.8	Moderate
14	2.8	Moderate
15	2.8	Moderate
16	2.8	Moderate
17	2.8	Moderate
18	2.9	Moderate
19	2.9	Moderate
20	2.9	Moderate
21	2.9	Moderate
22	2.9	Moderate
23	2.9	Moderate
24	3.0	Moderate
25	3.0	Moderate
26	3.0	Moderate
27	3.0	Moderate
28	3.1	Moderate
29	3.1	Moderate
30	3.1	Moderate
31	3.2	Moderate

Planning a trip in July

Is July a good time to visit Swellendam?

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

6.8

Sightseeing

12th-best month of the year

2.2

Beach & pool

12th-best month of the year

July is a reasonable time to visit Swellendam for sightseeing.

What to pack for Swellendam in July

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

In July, Swellendam sees daytime highs around 18°C and nights near 6°C. Worth packing: a warm layer. About 6 days see rain.

a warm layer

Sea temperature near Swellendam in July

The nearest coast averages about 15°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 56 km away) is warmest in February at about 22°C and coldest in July near 15°C.

It's comfortable for a long swim from Dec 15 to Mar 26 — about 3.4 months when the water holds above 20°C.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	21	22	21	19	17	16	15	15	16	17	19	20
Comfort	Refreshing	Refreshing	Refreshing	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Refreshing

	Sea temperature (°C)	Comfort
Jan	21	Refreshing
Feb	22	Refreshing
Mar	21	Refreshing
Apr	19	Cool
May	17	Cool
Jun	16	Cool
Jul	15	Cool
Aug	15	Cool
Sep	16	Cool
Oct	17	Cool
Nov	19	Cool
Dec	20	Refreshing

UV index in Swellendam in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Swellendam peaks around January 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	14	10	10	6	4	3	3	4	6	10	12	12
Level	Extreme	Very high	Very high	High	Moderate	Moderate	Moderate	Moderate	High	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	10	Very high
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	12	Extreme
Dec	12	Extreme

Air quality in Swellendam in July

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Swellendam is worst in June — around 17 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (January, 6 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	6	8	9	10	16	17	17	16	13	9	7	8
Level	Good	Good	Good	Good	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	6	Good
Feb	8	Good
Mar	9	Good
Apr	10	Good
May	16	Moderate
Jun	17	Moderate
Jul	17	Moderate
Aug	16	Moderate
Sep	13	Moderate
Oct	9	Good
Nov	7	Good
Dec	8	Good

Location & terrain

Where is Swellendam?

Swellendam sits at 34.0°S, 20.4°E, 128 m above sea level, in South Africa. The nearest listed city is Montagu, 40 km away.

Topography around Swellendam

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

Within 3 km, the terrain around Swellendam has only modest variations in elevation — a maximum elevation change of 248 m around an average of 163 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,677 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,683 m.

The land around Swellendam is covered by trees (28%), grassland (25%) and shrubs (24%) within 3 km, grassland (33%), cropland (31%) and shrubs (24%) within 16 km, and grassland (38%), shrubs (27%) and cropland (22%) within 80 km.

3 km

248 m

trees 28%

16 km

1,677 m

grassland 33%

80 km

1,683 m

grassland 38%

treesshrubsgrasslandcroplandartificial surfaceswater

← June Swellendam year-round climate August →Best places to visit in July

July weather nearby: Montagu 40 km · Ashton 41 km · Robertson 57 km · Bredasdorp 68 km · Riversdale 76 km · Caledon 96 km · Worcester 101 km · Gansbaai 118 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 Swellendam (-34.0226°, 20.4417°, elevation 128 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. 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).

	Avg high (°C)	Avg low (°C)
1	18	6
2	18	6
3	18	6
4	18	6
5	18	6
6	18	6
7	18	6
8	18	6
9	18	6
10	18	6
11	18	6
12	18	6
13	18	6
14	18	6
15	18	6
16	18	6
17	18	6
18	18	6
19	18	6
20	18	6
21	18	6
22	18	6
23	18	6
24	18	6
25	18	6
26	18	6
27	18	6
28	18	6
29	18	6
30	18	6
31	18	6

	Clearer (%)	Cloudier (%)
1	75	25
2	75	25
3	75	25
4	75	25
5	74	26
6	74	26
7	73	27
8	72	28
9	72	28
10	71	29
11	71	29
12	70	30
13	70	30
14	69	31
15	70	30
16	70	30
17	70	30
18	69	31
19	69	31
20	69	31
21	69	31
22	69	31
23	71	29
24	71	29
25	71	29
26	71	29
27	71	29
28	71	29
29	72	28
30	72	28
31	72	28

	Rain chance (%)
1	18
2	18
3	18
4	18
5	18
6	18
7	19
8	19
9	19
10	19
11	20
12	20
13	20
14	20
15	20
16	21
17	21
18	21
19	21
20	21
21	21
22	20
23	20
24	20
25	20
26	19
27	19
28	19
29	19
30	19
31	19

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	18	6
2	18	6
3	18	6
4	18	6
5	18	6
6	18	6
7	18	6
8	18	6
9	18	6
10	18	6
11	18	6
12	18	6
13	18	6
14	18	6
15	18	6
16	18	6
17	18	6
18	18	6
19	18	6
20	18	6
21	18	6
22	18	6
23	18	6
24	18	6
25	18	6
26	18	6
27	18	6
28	18	6
29	18	6
30	18	6
31	18	6

	Clearer (%)	Cloudier (%)
1	75	25
2	75	25
3	75	25
4	75	25
5	74	26
6	74	26
7	73	27
8	72	28
9	72	28
10	71	29
11	71	29
12	70	30
13	70	30
14	69	31
15	70	30
16	70	30
17	70	30
18	69	31
19	69	31
20	69	31
21	69	31
22	69	31
23	71	29
24	71	29
25	71	29
26	71	29
27	71	29
28	71	29
29	72	28
30	72	28
31	72	28

	Rain chance (%)
1	18
2	18
3	18
4	18
5	18
6	18
7	19
8	19
9	19
10	19
11	20
12	20
13	20
14	20
15	20
16	21
17	21
18	21
19	21
20	21
21	21
22	20
23	20
24	20
25	20
26	19
27	19
28	19
29	19
30	19
31	19

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	18	6
2	18	6
3	18	6
4	18	6
5	18	6
6	18	6
7	18	6
8	18	6
9	18	6
10	18	6
11	18	6
12	18	6
13	18	6
14	18	6
15	18	6
16	18	6
17	18	6
18	18	6
19	18	6
20	18	6
21	18	6
22	18	6
23	18	6
24	18	6
25	18	6
26	18	6
27	18	6
28	18	6
29	18	6
30	18	6
31	18	6

	Clearer (%)	Cloudier (%)
1	75	25
2	75	25
3	75	25
4	75	25
5	74	26
6	74	26
7	73	27
8	72	28
9	72	28
10	71	29
11	71	29
12	70	30
13	70	30
14	69	31
15	70	30
16	70	30
17	70	30
18	69	31
19	69	31
20	69	31
21	69	31
22	69	31
23	71	29
24	71	29
25	71	29
26	71	29
27	71	29
28	71	29
29	72	28
30	72	28
31	72	28

	Rain chance (%)
1	18
2	18
3	18
4	18
5	18
6	18
7	19
8	19
9	19
10	19
11	20
12	20
13	20
14	20
15	20
16	21
17	21
18	21
19	21
20	21
21	21
22	20
23	20
24	20
25	20
26	19
27	19
28	19
29	19
30	19
31	19

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100