Cape Town weather in August
Cape Town averages 17°C by day and 10°C at night in August, with the sea at 14°C and about 86 mm of rain in the month. It warms up by about 2°C into September.
Day
17°C
Night
10°C
Sea
14°C
Rain
86 mm
Flight from London
12h
What August feels like
August is mild in Cape Town: good for exploring, not reliably beach weather.
The sea is 14°C: cold for swimming, so plan on a heated pool.
Expect some rainy spells: about 86 mm falls in the month.
That is 6°C cooler than an average August day in London.
Of the 56 sun destinations we track, Cape Town is the #56 warmest in August.
Going to Cape Town in August?
Share the TikToks and Instagram Reels you've saved for Cape Town to Dream Trip. It finds the places, pins them on a map and builds your days around them.
Want it warmer in August?
These are hotter than Cape Town this month for at most an hour and a half more flying:
Cape Town weather by month
August is highlighted. Compare with July and September, or see the full year in Cape Town.
Cape Town in August: quick answers
Is Cape Town hot in August?
August is mild in Cape Town: good for exploring, not reliably beach weather. Average highs are 17°C and lows 10°C.
Can you swim in Cape Town in August?
The sea is 14°C: cold for swimming, so plan on a heated pool.
Does it rain in Cape Town in August?
Expect some rainy spells: about 86 mm falls in the month.
What is the warmest month in Cape Town?
February, at an average high of 26°C. The coolest is July at 17°C.
How long is the flight to Cape Town from the UK?
About 12h direct from London, estimated from the 9,672 km distance. Check your airline for exact times.
Still choosing? See where is hot in August for every destination ranked by temperature, sea and flight time.
How we measured this
Averages of every day in August from 2016 to 2025, from the Open-Meteo historical weather archive (ECMWF ERA5 reanalysis). Sea temperature is the 2023 to 2025 average from the Open-Meteo marine archive. Rain is the average monthly total. Reanalysis describes an area about 25 km across, so sheltered resorts can run a degree or two warmer. Flight time is a distance-based estimate from London Heathrow.
Planning Cape Town in August?
Save the restaurants, beaches and views you find on TikTok and Instagram for Cape Town straight to a map, then let Dream Trip turn them into a day-by-day plan.
