Knysna weather in April

In April, Knysna sees average daytime highs of 21°C and overnight lows near 14°C, with 52 mm of rain across 7.8 wet days and about 11.2 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 20°C by the end. The sky is clear or mostly clear about 44% of the time in April, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of April to 10 h 42 min by month's end. Set against the rest of the year, April is Knysna's 9th-clearest and 12th-windiest month. For the whole year in context, see Knysna's year-round climate.

Daytime high
21°
5th warmest
Overnight low
14°
8th coldest
Rainfall
52 mm
7.8 wet days
Daylight
11 h 12 min
6:53 AM – 6:03 PM
Cloud cover
45%
9th clearest
Wind
12 km/h
12th windiest
Solar energy
4.07 kWh/m²
Travel score
7.0
out of 10

Knysna is town in the Western Cape, South Africa.

Density
631/km²
people per km²
Founded
1871

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 20°C by the end.

A typical April day in Knysna reaches about 21°C in the afternoon and slips back to 14°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 25°C. Set against its neighbours, April runs about 2°C cooler than March and about 1°C warmer than May.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12216
22216
32215
42115
52115
62115
72115
82115
92115
102115
112115
122115
132115
142114
152114
162114
172114
182014
192014
202014
212014
222014
232014
242014
252014
262014
272013
282013
292013
302013

Knysna weather by month

How April compares with the rest of the year at a glance. April is the 5th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 17°499.2147.3
Feb23° / 18°427.913.37.4
Mar22° / 17°528.512.37.3
Apr21° / 14°527.811.27.0
May19° / 12°476.710.36.9
Jun18° / 11°437.29.86.5
Jul17° / 10°467.6106.2
Aug17° / 10°628.810.76.0
Sep18° / 11°498.511.86.2
Oct19° / 13°628.912.96.4
Nov20° / 14°709.313.86.6
Dec22° / 16°479.314.27.0

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 21% of April, with mostly cloudy or overcast conditions the remaining 35%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16535
26535
36535
46535
56634
66634
76535
86535
96535
106535
116634
126634
136634
146535
156535
166634
176535
186436
196436
206436
216436
226436
236436
246436
256535
266535
276535
286535
296634
306733

Chance of precipitation in April

Any precipitation

Knysna gets around 52 mm of rain over 7.8 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 26% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
128
228
328
428
528
627
727
827
927
1027
1126
1226
1326
1425
1525
1625
1725
1825
1925
2025
2125
2225
2325
2425
2525
2625
2725
2824
2924
3024

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 47% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12547281
22647260
32847250
42947240
53047220
63247210
73347200
83547180
93746170
103846160
114045140
124245130
134444120
144544110
154743100
16484290
17504280
18514180
19534070
20553960
21563860
22583750
23603640
24613540
25633430
26633430
27653320
28653320
29663220
30673210

Wind in April

Winds average 12 km/h in April, the calmest month.

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

051015151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 11 h 42 min at the start of April to 10 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over April. Sunrise moves from 6:42 AM to 7:04 AM, and sunset from 6:23 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:426:23
211.66:436:22
311.66:446:20
411.66:446:19
511.56:456:17
611.56:466:16
711.56:476:15
811.46:476:13
911.46:486:12
1011.46:496:11
1111.36:506:09
1211.36:506:08
1311.36:516:07
1411.26:526:05
1511.26:536:04
1611.26:536:03
1711.16:546:01
1811.16:556:00
1911.06:565:59
2011.06:575:58
2111.06:575:56
2210.96:585:55
2310.96:595:54
2410.97:005:53
2510.87:015:51
2610.87:015:50
2710.87:025:49
2810.87:035:48
2910.77:045:47
3010.77:045:46

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.07 kWh/m².

For context, solar energy here swings from a low near 2.65 kWh/m² to a high of 7.48 kWh/m² in December across the year — April's 4.07 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.5Bright
54.5Bright
64.5Bright
74.4Bright
84.4Bright
94.3Bright
104.3Bright
114.3Bright
124.2Bright
134.2Bright
144.1Bright
154.1Bright
164.0Bright
174.0Bright
184.0Moderate
193.9Moderate
203.9Moderate
213.8Moderate
223.8Moderate
233.8Moderate
243.7Moderate
253.7Moderate
263.7Moderate
273.6Moderate
283.6Moderate
293.6Moderate
303.5Moderate
Planning a trip in April

Is April a good time to visit Knysna?

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

7.0
Sightseeing
4th-best month of the year
4.1
Beach & pool
5th-best month of the year

April is one of the better times to visit Knysna for general sightseeing.

What to pack for Knysna in April

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

In April, Knysna sees daytime highs around 21°C and nights near 14°C. Little to plan around — just the basics. About 8 days see rain.

Sea temperature near Knysna in April

The nearest coast averages about 18°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in January at about 21°C and coldest in August near 17°C.

It's comfortable for a long swim from Dec 20 to Mar 14 — about 2.8 months when the water holds above 20°C.

16°18°20°22°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan21Refreshing
Feb21Refreshing
Mar20Refreshing
Apr18Cool
May18Cool
Jun17Cool
Jul17Cool
Aug17Cool
Sep17Cool
Oct17Cool
Nov18Cool
Dec20Cool

UV index in Knysna in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 Knysna 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 highModerateExtremeJan 15UV 13Jun 23UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar9Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct10Extreme
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Knysna?

Knysna sits at 34.0°S, 23.0°E, 9 m above sea level, in South Africa. The nearest listed city is Plettenberg Bay, 30 km away.

Humansdorp

Topography around Knysna

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

Within 3 km, the terrain around Knysna has significant variations in elevation — a maximum elevation change of 288 m around an average of 64 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 929 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,052 m.

The land around Knysna is covered by trees (41%) and water (20%) within 3 km, trees (45%) and water (34%) within 16 km, and water (36%) and grassland (31%) within 80 km.

3 km
288 m
16 km
929 m
80 km
2,052 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
April weather nearby: Plettenberg Bay 30 km · George 55 km · Groot-Brakrivier 76 km · Dysselsdorp 76 km · Mossel Bay 85 km · Oudtshoorn 92 km · Kruisfontein 155 km · Humansdorp 159 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 Knysna (-34.0363°, 23.0471°, elevation 9 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).