Cape Town
South Africa
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Cape Town, South Africa

An aerial view of Cape Town, South Africa, with the surrounding calm clear waters and several mountains
An aerial view of Cape Town, South Africa, with the surrounding calm clear waters and several mountains
August, the last month of the winter, in Cape Town, is another comfortable month, with average temperature varying between 17.8°C (64°F) and 7.5°C (45.5°F).

Temperature

In August, the average high-temperature is practically the same as in July - a still comfortable 17.8°C (64°F). In Cape Town, the average low-temperature is 7.5°C (45.5°F).

Humidity

In August, the average relative humidity in Cape Town is 80%.

Rainfall

In Cape Town, South Africa, it is raining for 13.7 days, with typically 77mm (3") of accumulated precipitation. In Cape Town, during the entire year, the rain falls for 103.7 days and collects up to 515mm (20.3") of precipitation.

Sea temperature

Months with the coldest seawater are July through September, with an average sea temperature of 15.3°C (59.5°F).
Note: For swimming, a surface water temperature of 15.3°C (59.5°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

In August, the average length of the day in Cape Town is 10.9h.

Sunshine

In August, the average sunshine in Cape Town is 6.8h.

UV index

In Cape Town, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In August, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in August in Cape Town?

In August, in Cape Town, South Africa, the average high-temperature is 17.8°C (64°F), and the average low-temperature is 7.5°C (45.5°F).

What is the average humidity in August in Cape Town?

In Cape Town, South Africa, the average relative humidity in August is 80%.

How much does it rain in Cape Town in August?

In Cape Town, South Africa, in August, it is raining for 13.7 days, with typically 77mm (3") of accumulated precipitation.

What are the months with the coldest sea water in Cape Town?

July through September, with an average sea temperature of 15.3°C (59.5°F), are months with the coldest seawater in Cape Town, South Africa.

How cold is the water in August in Cape Town?

In Cape Town, South Africa, the average seawater temperature in August is 15.3°C (59.5°F). For swimming, a surface water temperature of 15.3°C (59.5°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

What is the average length of the day in August in Cape Town?

In Cape Town, South Africa, the average length of the day in August is 10.9h.

How many hours of sunshine does Cape Town have in August?

In August, the average sunshine is 6.8h.

How high is the UV index in August in Cape Town?

The average daily maximum UV index in August in Cape Town, South Africa, is 4. A UV Index estimate of 3 to 5 represents a medium health risk from the exposure to the Sun's UV rays.
Average temperature in August - Cape Town, South Africa
  • Average high temperature in August: 17.8°C

The warmest month (with the highest average high temperature) is February (26.5°C).
The month with the lowest average high temperature is July (17.5°C).

  • Average low temperature in August: 7.5°C

The month with the highest average low temperature is January (15.7°C).
The coldest month (with the lowest average low temperature) is July (7°C).

Average humidity in August - Cape Town, South Africa
  • Average humidity in August: 80%

Months with the highest relative humidity are May, June and July (81%).
Months with the lowest relative humidity are January, November and December (71%).

Average rainfall in August - Cape Town, South Africa
  • Average rainfall in August: 77mm

The wettest month (with the highest rainfall) is June (93mm).
The driest month (with the lowest rainfall) is November (14mm).

Average rainfall days in August - Cape Town, South Africa
  • Average rainfall days in August: 13.7 days

The month with the highest number of rainy days is August (13.7 days).
The month with the lowest number of rainy days is February (4.6 days).

Average sea temperature in August - Cape Town, South Africa
  • Average sea temperature in August: 15.3°C

The best month for swimming (with the highest average sea temperature) is January (18.5°C).
Coldest months (with the lowest average sea temperature) are July, August and September (15.3°C).

Average daylight in August / Average sunshine in August - Cape Town, South Africa
  • Average daylight in August: 10.9h

The month with the longest days is December (Average daylight: 14.4h).
The month with shortest days is June (Average daylight: 9.9h).

  • Average sunshine in August: 6.8h

The month with most sunshine is January (Average sunshine: 10.9h).
The month with least sunshine is June (Average sunshine: 5.8h).

Average UV index in August - Cape Town, South Africa
  • Average UV index in August: 4

Months with the highest UV index are January and December (UV index 12).
Months with the lowest UV index are June and July (UV index 3).