September in Cape Town averages a daily high of 20.2°C with nights around 9.1°C. Expect roughly 7 wet days totalling 17.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Cape Town is September–April.
Based on CAPE TOWN INTERNATIONAL, SF (17.1km), 1995–2024. 22 years of September data.