Southern Italy, the Mezzogiorno, has a mediterranean climate but the weather is globally changing and can surprise you. Normally the winters are cooler than the summers but very enjoyable. Naples Italy ranges from 50’s (in the winter) to high 70’s (in the summer). It is a pleasant climate. Farther south from Naples gets warmer summers but never too hot because there are wonderful sea breezes. El Nino is causing temperature changes around the world. This winter has brought snow to Sicily for two years in a row. This was caused by El Nino. Southern Italy is not prepared for snow even when it lasts only several hours.
The sea is very calm in the summer months. It is like a sheet of glass.
In the winter it is a totally different sea. The waves are very violent. You would not want to be in it. It is still beautiful to walk along the beach but not too close to the sea.
Both seasons are very beautiful. We get to do everything we want in both Winter and Summer seasons. The beaches are very crowded in August (when most Europeans are off – this is from the days before air conditioners and has stuck as a custom). It is fun because you meet more people from everywhere and everything is open. In the winter months many restaurants near the beaches close on a weeknight and are open only Friday, Saturday and Sunday evenings. The winter allows you to meet more locals in a relaxed environment. Sit and talk with them as best you can. We use broken Italian, English with a vowel on the end, and charades. It is not hard to communicate with happy people like the Italians.