Hot in Aug
28°C average high
avg high · 21° at night
25°C+ on 9 in 10 days
South Africa
Cape Town weather in August
Is it warm? Not really. August in Cape Town is cool: afternoons average 17°C and nights 10°C. Most days (80%) peak between 14°C and 20°C.
Cool · average high
17°C
25°C or more on almost no days; 20°C or more on about one in ten days.
- Average low10°overnight
- Sea14°average, 2023–2025
- Rainy days988 mm in the month
- SkyOften cloudy46% cloud · 34% clear days
How warm it really gets
Every August afternoon from 2011–2025: 465 days. Most (80%) peaked between 14° and 20°.
August, year by year
The average August high in each year. The warmest, 2023, averaged 18°C; the coolest, 2012, 15°C.
Compared with home
Average August highs. Expect rain on about 9 days (88 mm in a typical month).
- Cape Town17°
- London22°
- Manchester19°
- Dublin19°
- Cork19°
- Belfast18°
- Glasgow18°
Warmer in August, not much further
Flying times are estimates from Dublin; Cape Town is about 12h 45m.
Hot in Aug
31°C average high
avg high · 23° at night
25°C+ on almost every day
Hot in Aug
31°C average high
avg high · 22° at night
25°C+ on almost every day
Air: ERA5 reanalysis via Open-Meteo, 2011–2025. Sea: Copernicus Marine analysis via Open-Meteo, 2023–2025. Rainy day = 2 mm or more. Clear day = average cloud cover of 30% or less. These are averages of past weather, not a forecast. Methodology