Sea Temperature in Arniston in September

© Rodger Thompson

Complete information on the sea temperature range in the Indian Ocean in Arniston in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Arniston. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Arniston Climate and Swimming Opportunities in September

Arniston lies within the Western Cape in South Africa. The average daytime temperature in Arniston in September is 20°C (67°F), while the nighttime average is 10°C (51°F). There are typically eight rainy days during the month, with a total precipitation of 53 mm (2.1 inches). The daylight duration in September in Arniston is 12 hours, with an average of 7 hours of sunshine per day. The average wind speed in September is 16 km/h (10 mph), and the humidity level is around 75%.

The water temperature in Arniston in September ranges from 14°C to 16°C (57°F to 61°F). At the beginning of the month, the average temperature is around 15°C (59°F), shifting to 15°C (59°F) by mid-September and reaching 15°C (59°F) in the last ten days. Overall, the average sea temperature in Arniston for September is 15°C (59°F). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Frequently Asked Questions About Water Temperatures in September in Arniston