cape town average temp
Average temperatures While the average annual temperature in Cape Town is 17 degrees, the average high temperature is a comfortable 21 degrees. Cool fact: more than fifty percent (189 days a year) of the time you will experience temperatures of over 21 degrees in Cape Town.Average sea temperatures range between a chirpy 13 degrees or less on the Atlantic Seaboard to a warm 17 degrees or more in False Bay.ool fact: more than fifty percent (189 days a year) of the time you will experience temperatures of over 21 degrees in Cape Town. Average sea temperatures range between a chirpy 13 degrees or less on the Atlantic Seaboard to a warm 17 degrees or more in False Bay.