September in Naples averages highs of 26 °C (80 °F) and lows of 18 °C (65 °F), with about 8 rainy days and 12 h 24 min of daylight. The sea is warm, around 25 °C (78 °F).
September weather in Naples at a glance
average high to low each dot ≈ 3 rainy days
Is September a good time to visit Naples?
Good time to go: comfortably warm and some rain. September is usually high season in Naples: book rooms early, as prices are typically at their highest.
Our rule: a month scores 2 points for comfortable average highs of 18–28 °C (1 point for 14–18 or 28–32 °C) and 2 points for 5 or fewer rainy days (1 point for 6–10). Average highs above 35 °C or below 8 °C make it a tough month whatever the rain. A rainy day here means 2 mm of rain or more. 4 points = great, 3 = good, 2 = mixed, 0–1 = tough.
Holidays and events in September 2026
- Feast of San Gennaro on 19 September event
Banks and many shops close on public holidays, and museums may change their hours, so check before you go.
Things to do in Naples in September
September's weather suits a mix of outdoor sights and museums, so the open-air ones come first.
- Centro Storico and Spaccanapoli — pizza on Via dei Tribunali outdoors
- Pompeii and Herculaneum — by Circumvesuviana train outdoors
- Mount Vesuvius — short crater walk outdoors
- Lungomare and Castel dell'Ovo outdoors
- National Archaeological Museum — Pompeii's treasures indoors
- Underground Naples indoors
- Beach and swimming — the sea averages 25 °C (78 °F) in September. outdoors
Where to stay: Centro Storico for pizza and churches; Chiaia for seafront and boutiques.
What to pack for Naples in September
- Summer clothes, sunglasses and sunscreen.
- Swimwear.
- Comfortable walking shoes.
What a day in Naples costs
| Budget traveller | Mid-range | |
|---|---|---|
| Typical total per person, per day | €45–100 | €120–260 |
Excluding flights. September is usually high season in Naples: book rooms early, as prices are typically at their highest.
September in nearby cities
| City | High / low | Rainy days | Verdict |
|---|---|---|---|
| Rome | 27° / 17° | 7 | Good time to go |
| Dubrovnik | 26° / 18° | 7 | Good time to go |
| Florence | 26° / 15° | 8 | Good time to go |
Want the whole trip planned? Join the Journey waitlist: tell it where, when and your budget, and it plans every day hour by hour.
FAQ
Is September a good time to visit Naples?
By the numbers, September is a good time to go: comfortably warm and some rain, with average highs of 26 °C (80 °F) and about 8 rainy days. September is usually high season in Naples: book rooms early, as prices are typically at their highest. The best months for weather are June.
How warm is Naples in September?
Average highs are 26 °C (80 °F) and lows 18 °C (65 °F) (2015–2024 averages). The sea is warm, around 25 °C (78 °F).
Does it rain a lot in Naples in September?
Expect about 8 days with 2 mm of rain or more, about 102 mm in total. It is the 5th driest month of the year in Naples.
Sources: climate averages from Open-Meteo historical weather (ERA5 reanalysis, 2015–2024); sea temperatures from the Open-Meteo marine API (2023–2024); public holidays from Nager.Date. Daylight is calculated for the 15th of the month. Averages are a guide, not a forecast. Costs are typical ranges per person per day, excluding flights.