Cadiz has a mixed climate which is partly Mediterranean and partly Atlantic, with temperatures not usually rising above +34Cº in summer. Winter temperatures are usually quite moderate too, with the average yearly temperature of around 18ºC. It has moderate rainfall and it NEVER snows!!!! I love this bit!! The average yearly temperature of the sea-water is around 17ºC.
Since the city is located at the Atlantic coast, it can often be very windy. Take a light cardigan with you, although you will not probably need it before the sun goes down or very early in the morning in summer. You will not need a jacket or coat in summer :-)
There are about 300 sunny days per year in Cadiz. However, even though you went there in summer, make sure you have smartish looking clothes for the purpose of going to the town or during the day and to the restaurants in the evening. Skimpy clothes are fine for the beaches, but if you wear them in town, you are likely to stand out from the crowd and attract wrong kind of attention.
Photo Equipment: With the Atlantic Ocean on three sides, blue skies and interesting, ancient street, Cadiz affords many wonderful photo opportunities. Be sure you're prepared with the appropriate photo equipment.