How warm is it in Cape Town in August?

Daytime highs averaged 15.4 °C, night-time lows 12.8 °C. The highest value of the past 10 years was 21.6 °C (28 Aug 2023), the lowest 9.3 °C (29 Aug 2024).

How often does it rain in Cape Town in August?

On average there were 10.7 rain days (at least 1 mm) with 77.3 mm of precipitation in total.

🇿🇦 Weather in Cape Town in August

This is what the weather in Cape Town (South Africa) was like in August in 2017–2026.

Key facts at a glance

Prevailing weather: Sunny

Avg. daytime high

15.4 °C

14.9 °C – 16.3 °C

Avg. night-time low

12.8 °C

12.0 °C – 13.7 °C

Avg. rain days in period

10.7

35 % of days · ≥ 1.0 mm

Avg. precipitation in period

77.3 mm

24.1 mm – 136 mm

Avg. sunshine per day

n/a

Sunshine duration is not available from this data source.

Avg. sea temperature

–

Sea temperature unavailable for today (daily limit).

Extremes: Highest temperature 21.6 °C (28 Aug 2023) · Lowest temperature 9.3 °C (29 Aug 2024) · Avg. daily peak wind 29 km/h

Weather mix of all days

123Sunny
52Partly cloudy
2Cloudy
60Light rain
47Rain

Summary

On average 15.4 °C during the day and 12.8 °C at night.
On average 10.7 rain days (Rain day = at least 1.0 mm of precipitation) with 77.3 mm of precipitation in total.
Prevailing: Sunny.
Warmest year: 2019 (avg. 16.3 °C), coolest: 2024 (avg. 14.9 °C).
Wettest year: 2021 (136 mm), driest: 2026 (24.1 mm).
Extremes: 21.6 °C on 28 Aug 2023 and 9.3 °C on 29 Aug 2024.

Overall values from all 10 years. How is this calculated?

Temperatures per year

Average over your travel period

Precipitation & rain days

Year by year

2026
Avg. max15.9°Avg. min12.9°
Rain days
5 Rain days
Precipitation
24.1 mm
Avg. sunshine per day
n/a
Sea temperature
–
Max 19.3 °C · Min 11.1 °C
2025
Avg. max15.3°Avg. min13.1°
Rain days
10 Rain days
Precipitation
54.1 mm
Avg. cloud cover
37 % cloudy
Sea temperature
–
Max 17.9 °C · Min 11.7 °C
2024
Avg. max14.9°Avg. min12.0°
Rain days
15 Rain days
Precipitation
115 mm
Avg. cloud cover
37 % cloudy
Sea temperature
–
Max 16.4 °C · Min 9.3 °C
2023
Avg. max15.6°Avg. min12.8°
Rain days
8 Rain days
Precipitation
56.4 mm
Avg. cloud cover
29 % cloudy
Sea temperature
–
Max 21.6 °C · Min 11.4 °C
2022
Avg. max15.3°Avg. min12.7°
Rain days
9 Rain days
Precipitation
79.8 mm
Avg. cloud cover
32 % cloudy
Sea temperature
–
Max 19.4 °C · Min 10.4 °C
2021
Avg. max15.0°Avg. min12.3°
Rain days
11 Rain days
Precipitation
136 mm
Avg. cloud cover
33 % cloudy
Sea temperature
–
Max 17.2 °C · Min 9.7 °C
2020
Avg. max15.3°Avg. min12.9°
Rain days
15 Rain days
Precipitation
117 mm
Avg. cloud cover
33 % cloudy
Sea temperature
–
Max 17.3 °C · Min 10.0 °C
2019
Avg. max16.3°Avg. min13.7°
Rain days
9 Rain days
Precipitation
35.3 mm
Avg. cloud cover
25 % cloudy
Sea temperature
–
Max 20.1 °C · Min 12.4 °C
2018
Avg. max15.1°Avg. min12.5°
Rain days
14 Rain days
Precipitation
90.7 mm
Avg. cloud cover
34 % cloudy
Sea temperature
–
Max 17.7 °C · Min 11.1 °C
2017
Avg. max15.7°Avg. min13.1°
Rain days
11 Rain days
Precipitation
65.2 mm
Avg. cloud cover
33 % cloudy
Sea temperature
–
Max 18.9 °C · Min 11.8 °C

Frequently asked questions

How warm is it in Cape Town in August?: Daytime highs averaged 15.4 °C, night-time lows 12.8 °C. The highest value of the past 10 years was 21.6 °C (28 Aug 2023), the lowest 9.3 °C (29 Aug 2024).
How often does it rain in Cape Town in August?: On average there were 10.7 rain days (at least 1 mm) with 77.3 mm of precipitation in total.

Check your exact travel dates

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Data sources

Weather data: Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains.
Sea temperature: MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis)
Place search: Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)