Weather in Naples in August

How August compares

August is the 1st warmest month of the year in Naples and ranks 50th of 134 destinations we compare for August - see where else is hot in August. Within Italy it is 5th of 16 (Italy in August). Against London's average high of 21.4°C in August, Naples is 8.1°C warmer by day and 7.8°C warmer at night.

Daytime and night-time in August

The typical August day in Naples peaks at 29.5°C, but that is an average: the warmest 10% of days reach 32.6°C or more. About 96% of days top 25°C and 1 in 2 pass 30°C. Nights average 21.3°C; one night in ten drops to 19.2°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest August day here reached 36.6°C (2007-08-25) and the coldest night 16.0°C (1995-08-30).

Rain in August

Some rain (4-8 rainy days): about 4 days with 1 mm or more, 23 mm in total. Year to year it varies a lot - the wettest August was 1995 with 107 mm, the driest 2011 with 1 mm. Humidity averages 70%.

Sea temperature in August

The sea averages 26.4°C - warm enough to swim (22°c+). Depending on the year it ranges from 25.5°C to 27.5°C. This is the warmest the sea gets here all year.

Sunshine and daylight

Around 10.6 hours of sunshine a day (estimated from cloud cover), 13.6 hours of daylight: the sun rises about 06:13 and sets about 20:02 local time in mid-August. Average cloud cover is 22%.

Is August a good time to visit Naples?

Yes - it is one of the better months: hot days, manageable rain and long sunny days. The best months for Naples on our scoring are July, August, June; months averaging 25°C or more: Jun, Jul, Aug, Sep.

Plan around the heat, not just the sunshine

August is Naples' warmest month, so treat the heat as part of your daily planning rather than an occasional inconvenience. Humidity averages 70%, which can make warm conditions feel more uncomfortable, particularly when you are walking. The hottest days reach 32.6°C or more, so leave room to slow down rather than filling every afternoon with outdoor plans. Aim for longer walks earlier in the day, use the middle of the day for shaded breaks, and carry water. Light, breathable clothing makes sense, while air conditioning is worth prioritising when choosing somewhere to stay. Evenings offer some relief, but they are still warm.

Warm sea, with plenty of daylight

The sea is a strong reason to choose August if swimming matters to your holiday. At an average 26.4°C, it is comfortably in the warm swimming range rather than something to brace yourself for. The year-to-year range of 26°C to 28°C also suggests that warm water is a dependable feature of the month. There are about 10.6 hours of sunshine within 13.6 hours of daylight, giving you flexibility to fit outdoor time around the heat. You do not need to spend the middle of the day in direct sun to make use of the conditions. Pack sun protection alongside your swimwear.

Rain is a smaller concern than comfort

With about 4 rainy days, August is better suited to mainly outdoor plans than to a holiday organised around avoiding showers. That does not mean every day will be dry, so keep some flexibility rather than assuming an uninterrupted run of sunshine. A compact umbrella is a sensible backup; heavy wet-weather clothing is unlikely to be the priority for your packing. The bigger question is how well you cope with warm days followed by warm nights. Naples in August suits travellers happy to take breaks and adjust their pace. If your preferred city holiday involves walking continuously until evening, the heat is a clear drawback.