Atlantis weather in May

In May, Atlantis sees average daytime highs of 21°C and overnight lows near 10°C, with 47 mm of rain across 6.5 wet days and about 10.3 hours of daylight. It is the 8th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 19°C by the end. The sky is clear or mostly clear about 44% of the time in May, and the air most often feels dry.

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

Daytime high
21°
8th warmest
Overnight low
10°
5th coldest
Rainfall
47 mm
6.5 wet days
Daylight
10 h 18 min
7:34 AM – 5:50 PM
Cloud cover
47%
12th clearest
Wind
11 km/h
12th windiest
Solar energy
3.06 kWh/m²
Travel score
7.3
out of 10

Atlantis is town in the Western Cape, South Africa.

Density
2,869/km²
people per km²

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 22°C in the first days to 19°C by the end.

A typical May day in Atlantis reaches about 21°C in the afternoon and slips back to 10°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 27°C. Set against its neighbours, May runs about 3°C cooler than April and about 3°C warmer than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12311
22311
32211
42211
52211
62211
72211
82211
92211
102211
112211
122211
132211
142211
152211
162210
172110
182110
192110
202110
212110
222010
232010
242010
252010
262010
27209
28199
29199
30199
31199

Atlantis weather by month

How May compares with the rest of the year at a glance. May is the 8th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 17°102.2147.4
Feb29° / 17°101.913.27.3
Mar27° / 16°112.212.38.1
Apr24° / 13°324.211.28.1
May21° / 10°476.510.37.3
Jun18° / 769.49.86.3
Jul18° / 698.2106.3
Aug18° / 598.510.86.4
Sep20° / 10°366.311.87.0
Oct23° / 12°244.112.88.1
Nov25° / 14°214.113.78.2
Dec27° / 16°122.914.28.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 38%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16634
26634
36634
46634
56634
66634
76634
86535
96535
106535
116436
126436
136436
146337
156337
166238
176238
186139
196139
206040
215941
225941
235941
245842
255842
265842
275842
285842
295842
305842
315941

Chance of precipitation in May

Any precipitation

Atlantis gets around 47 mm of rain over 6.5 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 21% and peaks near 32% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
116
216
316
416
516
616
716
816
916
1016
1116
1216
1316
1416
1516
1617
1718
1818
1919
2020
2122
2223
2324
2426
2527
2628
2729
2830
2931
3032
3132

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 86% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
177221
279210
379210
480200
581190
681190
782180
883170
984160
1085150
1185150
1286140
1386140
1487130
1587130
1687130
1788120
1888120
1988120
2089110
2189110
2289110
2390100
2490100
259190
269190
279280
289280
299370
309370
319370

Wind in May

Winds average 11 km/h in May, the calmest month.

Across May, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in May

DaylightNight

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

Days shrink by about 42 minutes over May. Sunrise moves from 7:23 AM to 7:45 AM, and sunset from 6:04 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.77:236:04
210.77:246:03
310.67:246:02
410.67:256:01
510.67:266:00
610.57:275:59
710.57:275:58
810.57:285:57
910.47:295:56
1010.47:305:55
1110.47:315:54
1210.47:315:53
1310.37:325:53
1410.37:335:52
1510.37:345:51
1610.37:345:50
1710.27:355:50
1810.27:365:49
1910.27:375:48
2010.27:375:48
2110.27:385:47
2210.17:395:46
2310.17:395:46
2410.17:405:45
2510.17:415:45
2610.07:415:44
2710.07:425:44
2810.07:435:43
2910.07:435:43
3010.07:445:43
3110.07:455:42

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.06 kWh/m².

For context, solar energy here swings from a low near 2.53 kWh/m² to a high of 8.37 kWh/m² in January across the year — May's 3.06 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.6Moderate
23.6Moderate
33.5Moderate
43.5Moderate
53.5Moderate
63.4Moderate
73.4Moderate
83.4Moderate
93.3Moderate
103.3Moderate
113.3Moderate
123.2Moderate
133.2Moderate
143.2Moderate
153.1Moderate
163.1Moderate
173.0Moderate
183.0Moderate
193.0Moderate
202.9Moderate
212.9Moderate
222.9Moderate
232.8Moderate
242.8Moderate
252.8Moderate
262.8Moderate
272.7Moderate
282.7Moderate
292.7Moderate
302.7Moderate
312.7Moderate
Planning a trip in May

Is May a good time to visit Atlantis?

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

7.3
Sightseeing
7th-best month of the year
4.6
Beach & pool
8th-best month of the year

May is one of the better times to visit Atlantis for general sightseeing.

What to pack for Atlantis in May

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

In May, Atlantis sees daytime highs around 21°C and nights near 10°C. Little to plan around — just the basics. About 7 days see rain.

Sea temperature near Atlantis in May

The nearest coast averages about 15°C in May — 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 17°C and coldest in July near 14°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

12°14°16°18°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan17Cool
Feb17Cool
Mar16Cool
Apr15Cool
May15Bracing
Jun15Bracing
Jul14Bracing
Aug14Bracing
Sep15Bracing
Oct15Bracing
Nov16Cool
Dec16Cool

UV index in Atlantis in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Atlantis 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 13UV 13Jun 20UV 3
UV index (midday)Level
Jan13Extreme
Feb10Very high
Mar10Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct10Very high
Nov11Extreme
Dec12Extreme

Air quality in Atlantis in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Atlantis is worst in May — around 52 µg/m³ PM2.5 (poor), about 3.4× the cleanest month (December, 15 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMay 2152 µg/m³Dec 1516 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb19Moderate
Mar28Moderate
Apr41Poor
May52Poor
Jun50Poor
Jul47Poor
Aug41Poor
Sep33Moderate
Oct29Moderate
Nov18Moderate
Dec15Moderate
Location & terrain

Where is Atlantis?

Atlantis sits at 33.6°S, 18.5°E, 178 m above sea level, in South Africa. The nearest listed city is Malmesbury, 25 km away.

Topography around Atlantis

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

Within 3 km, the terrain around Atlantis has only modest variations in elevation — a maximum elevation change of 92 m around an average of 173 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 557 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,042 m.

The land around Atlantis is covered by shrubs (50%) and artificial surfaces (25%) within 3 km, shrubs (37%) and cropland (24%) within 16 km, and water (30%) and cropland (29%) within 80 km.

3 km
92 m
16 km
557 m
80 km
2,042 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Malmesbury 25 km · Durbanville 33 km · Kraaifontein 38 km · Cape Town 40 km · Rondebosch 44 km · Athlone 45 km · Kuils River 47 km · Lansdowne 47 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 Atlantis (-33.5667°, 18.4834°, elevation 178 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).