Weather in Sorrento in September

How September compares

September is the 4th warmest month of the year in Sorrento and ranks 105th of 134 destinations we compare for September - see where else is hot in September. Within Italy it is 7th of 16 (Italy in September). Against London's average high of 18.6°C in September, Sorrento is 5.7°C warmer by day and 8.2°C warmer at night.

Daytime and night-time in September

The typical September day in Sorrento peaks at 24.3°C, but that is an average: the warmest 10% of days reach 27.2°C or more. Roughly 1 in 2 days top 25°C and 1 in 125 pass 30°C. Nights average 19.4°C; one night in ten drops to 16.7°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest September day here reached 31.8°C (2020-09-13) and the coldest night 12.6°C (2017-09-21).

Rain in September

Wet (more than 8 rainy days): about 9 days with 1 mm or more, 89 mm in total. Year to year it varies a lot - the wettest September was 1996 with 213 mm, the driest 1997 with 14 mm. Humidity averages 72%.

Sea temperature in September

The sea averages 24.4°C - warm enough to swim (22°c+). Depending on the year it ranges from 23.6°C to 25.3°C. For the warmest sea here, come in August (26.4°C).

Sunshine and daylight

Around 7.4 hours of sunshine a day (estimated from cloud cover), 12.2 hours of daylight: the sun rises about 06:43 and sets about 19:12 local time in mid-September. Average cloud cover is 39%.

Is September a good time to visit Sorrento?

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

Warm enough for summer clothes, with a layer for evenings

Expect warmth rather than relentless heat. Around 40% of days reach 25°C, while only 1% reach 30°C, so September suits travellers who dislike very hot weather. London's September daytime average is 18.6°C, making Sorrento noticeably warmer at the same time of year. Light clothes should work well during the day, though direct sunshine can still feel hot around midday. Humidity averages 72%, so loose, breathable fabrics are a sensible choice. Evenings are generally mild, but the coldest 10% of nights fall to 16.7°C or lower. Pack a light jumper or cardigan rather than assuming every evening will be comfortable in short sleeves.

Good swimming weather, but leave room for rain

The sea is a strong reason to choose September: at an average of 24.4°C, it is warm enough for swimming rather than just a quick dip. There is also useful sunshine, averaging about 7.4 hours within 12.2 hours of daylight. The catch is rain, with about 9 rainy days during the month. That does not mean those days are wet throughout, but it does make a completely dry holiday something you should not count on. Keep swimming and other outdoor plans flexible, and bring a light waterproof. September works best if you want warmth and sea time without needing clear skies every day; it is less suitable if avoiding rain is your main priority.