Jeffreys Bay weather in September

In September, Jeffreys Bay sees average daytime highs of 19°C and overnight lows near 13°C, with 38 mm of rain across 7.3 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 41% 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 Jeffreys Bay's 10th-clearest and 3rd-windiest month. For the whole year in context, see Jeffreys Bay's year-round climate.

Daytime high
19°
9th warmest
Overnight low
13°
4th coldest
Rainfall
38 mm
7.3 wet days
Daylight
11 h 48 min
6:21 AM – 6:08 PM
Cloud cover
48%
10th clearest
Wind
16 km/h
3rd windiest
Solar energy
4.73 kWh/m²
Travel score
6.7
out of 10

Jeffreys Bay is town in the Eastern Cape, South Africa.

Density
1,562/km²
people per km²
Founded
1849

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 19°C through the month.

A typical September day in Jeffreys Bay reaches about 19°C in the afternoon and slips back to 13°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 24°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11912
21912
31912
41912
51912
61913
71913
81913
91913
101913
111913
121913
131913
141913
151913
161913
171913
181913
191913
201913
211913
221913
232013
242013
252013
262013
272013
282013
292013
302013

Jeffreys Bay 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.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 18°397.5147.7
Feb24° / 19°417.313.37.5
Mar24° / 18°467.712.37.6
Apr22° / 16°437.211.27.3
May21° / 14°366.310.37.3
Jun19° / 12°366.19.87.1
Jul19° / 12°366.3107.1
Aug19° / 12°527.510.76.8
Sep19° / 13°387.311.86.7
Oct20° / 14°508.312.96.7
Nov21° / 16°568.513.86.9
Dec23° / 17°438.214.27.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 37%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16931
26832
36832
46733
56634
66634
76634
86634
96535
106535
116436
126337
136337
146337
156337
166337
176337
186238
196238
206238
216238
226238
236238
246139
256139
266139
276040
286040
296040
305941

Chance of precipitation in September

Any precipitation

Jeffreys Bay gets around 38 mm of rain over 7.3 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 24% and peaks near 26% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
122
222
322
423
523
623
724
824
924
1024
1124
1224
1324
1425
1525
1625
1725
1825
1925
2025
2125
2225
2325
2425
2526
2626
2726
2826
2926
3026

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 79% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
188120
288120
388120
487130
587130
686131
785141
885141
984151
1083161
1182162
1281172
1380182
1479192
1578193
1677203
1776213
1876213
1976213
2075223
2175223
2275223
2375223
2474233
2574233
2674233
2773243
2872244
2971254
3071254

Wind in September

Winds average 16 km/h in September.

Across September, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light 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 6:42 AM to 6:01 AM, and sunset from 5:58 PM to 6:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.36:425:58
211.36:415:58
311.36:405:59
411.46:386:00
511.46:376:01
611.46:356:01
711.56:346:02
811.56:336:03
911.56:316:03
1011.66:306:04
1111.66:286:05
1211.66:276:06
1311.76:256:06
1411.76:246:07
1511.86:226:08
1611.86:216:08
1711.86:196:09
1811.96:186:10
1911.96:176:11
2011.96:156:11
2112.06:146:12
2212.06:126:13
2312.06:116:13
2412.16:096:14
2512.16:086:15
2612.26:066:16
2712.26:056:16
2812.26:036:17
2912.36:026:18
3012.36:016:19

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.73 kWh/m².

For context, solar energy here swings from a low near 2.64 kWh/m² to a high of 7.05 kWh/m² in December across the year — September's 4.73 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.3Bright
44.3Bright
54.3Bright
64.4Bright
74.4Bright
84.4Bright
94.5Bright
104.5Bright
114.5Bright
124.6Bright
134.6Bright
144.7Bright
154.7Bright
164.7Bright
174.8Bright
184.8Bright
194.8Bright
204.9Bright
214.9Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.2Bright
Planning a trip in September

Is September a good time to visit Jeffreys Bay?

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

6.7
Sightseeing
11th-best month of the year
3.1
Beach & pool
10th-best month of the year

September is a reasonable time to visit Jeffreys Bay for sightseeing.

What to pack for Jeffreys Bay in September

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

In September, Jeffreys Bay sees daytime highs around 19°C and nights near 13°C. Worth packing: sun protection. About 7 days see rain.

sun protection

Sea temperature near Jeffreys Bay 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 offshore is warmest in February at about 21°C and coldest in August near 17°C.

It's comfortable for a long swim from Dec 23 to Mar 23 — about 3 months when the water holds above 20°C.

16°18°20°22°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan21Refreshing
Feb21Refreshing
Mar20Refreshing
Apr19Cool
May19Cool
Jun18Cool
Jul18Cool
Aug17Cool
Sep17Cool
Oct18Cool
Nov19Cool
Dec20Cool

UV index in Jeffreys Bay 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 Jeffreys Bay peaks around January 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 15UV 13Jun 23UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar9Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct10Extreme
Nov11Extreme
Dec12Extreme

Air quality in Jeffreys Bay 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 Jeffreys Bay is worst in June — around 18 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (February, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 1618 µg/m³Feb 97 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar9Good
Apr10Good
May14Moderate
Jun18Moderate
Jul15Moderate
Aug16Moderate
Sep13Moderate
Oct11Good
Nov9Good
Dec7Good
Location & terrain

Where is Jeffreys Bay?

Jeffreys Bay sits at 34.0°S, 24.9°E, 49 m above sea level, in South Africa. The nearest listed city is Humansdorp, 14 km away.

Somerset EastGrahamstownKnysna

Topography around Jeffreys Bay

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

Within 3 km, the terrain around Jeffreys Bay has only modest variations in elevation — a maximum elevation change of 122 m around an average of 31 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 449 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,657 m.

The land around Jeffreys Bay is covered by water (39%), grassland (26%) and artificial surfaces (23%) within 3 km, water (46%) and grassland (32%) within 16 km, and water (37%) and grassland (34%) within 80 km.

3 km
122 m
16 km
449 m
80 km
1,657 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Humansdorp 14 km · Kruisfontein 18 km · Kariega 55 km · Port Elizabeth 65 km · Plettenberg Bay 143 km · Somerset East 160 km · Grahamstown 170 km · Knysna 173 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
Christian 86%or other traditional African religions 5%nothing in particular 5%Muslim 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 Jeffreys Bay (-34.0453°, 24.9215°, elevation 49 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).