Typically, the Sorrento peninsula experiences mild and sunny conditions in September. Average daytime temperatures hover around 25C (77F), while evenings cool down to a comfortable 18C (64F). Sea temperatures remain warm, generally around 24C (75F), making swimming and other water activities still enjoyable. Rainfall is relatively low compared to other months, though some showers are possible. This period represents a transition from the hotter summer months to the milder autumn season.
This period offers an appealing blend of pleasant weather and fewer crowds compared to the peak summer season. The lower temperatures make exploring the town, hiking the surrounding hills, and visiting nearby archaeological sites like Pompeii and Herculaneum more comfortable. The sea remains inviting for swimming, boating, and other water sports. Historically, September has been a favored time for travelers seeking a balance between good weather and a more tranquil experience.