Your June weather guide
HotWeather in Naples in June
June is a good time for Naples if you want warm days and a sea comfortable enough for swimming, but plan for heat rather than mild spring weather. Average highs are around 26°C, nights fall to about 18°C, and the sea reaches roughly 23°C. For a UK traveller, that means light clothing by day, a layer for later and room in the itinerary for an occasional wet spell.
Long-term climate averages for Naples, not a forecast · 1991-2020
Naples, month by month
Your snapshot
At a glance
The useful details for Naples.
- Average daytime high
- 25.9°C
- 9 in 10 days stay below 30°C
- Average night-time low
- 17.8°C
- coldest 10% of nights: 15°C or lower
- Compared with London
- +6.3°C
- London averages 19.6°C in June
- Sea temperature
- 22.8°C
- year to year: 22°C to 24°C
- Sunshine per day (est.)
- 9.9h
- 66% of 14.9 h of daylight
- Rainy days (1 mm+)
- 6
- 34 mm over the month
- Humidity
- 74%
- Days over 25°C
- 61%
- 11% over 30°C
- Record high 1991-2020
- 34.6°C
- 2006-06-28
- Record low 1991-2020
- 10.8°C
- 2006-06-04
- Flight from London
- ≈ 2 h 42 min
- 1594 km, short-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How June compares
June is the 3rd warmest month of the year in Naples and ranks 84th of 134 destinations we compare for June - see where else is hot in June. Within Italy it is 8th of 16 (Italy in June). Against London's average high of 19.6°C in June, Naples is 6.3°C warmer by day and 6.5°C warmer at night.
Daytime and night-time in June
The typical June day in Naples peaks at 25.9°C, but that is an average: the warmest 10% of days reach 30.0°C or more. About 61% of days top 25°C and 1 in 9 pass 30°C. Nights average 17.8°C; one night in ten drops to 14.6°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest June day here reached 34.6°C (2006-06-28) and the coldest night 10.8°C (2006-06-04).
Rain in June
Some rain (4-8 rainy days): about 6 days with 1 mm or more, 34 mm in total. Year to year it varies a lot - the wettest June was 2009 with 96 mm, the driest 2017 with 2 mm. Humidity averages 74%.
Sea temperature in June
The sea averages 22.8°C - warm enough to swim (22°c+). Depending on the year it ranges from 21.7°C to 23.8°C. For the warmest sea here, come in August (26.4°C).
Sunshine and daylight
Around 9.9 hours of sunshine a day (estimated from cloud cover), 14.9 hours of daylight: the sun rises about 05:31 and sets about 20:36 local time in mid-June. Average cloud cover is 33%.
Is June 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.
Warm enough for swimming, with some hotter days
June suits travellers who enjoy summer warmth but are happy to slow down around midday. Days can reach 30°C or more, so the average high is not a ceiling: keep longer walks for the morning or later in the day and leave space for shaded breaks. Humidity averages 74%, which can make warm spells feel sticky. Pack loose, breathable clothes, comfortable footwear and sun protection rather than relying on the temperature alone to judge comfort. The sea is warm enough for swimming, making time in the water a reasonable part of your plans rather than something reserved for especially hot days. A light layer remains useful once the warmth fades.
Plenty of daylight, but keep a flexible plan
Rain is a possibility rather than the main reason to rule June out. There are about 6 rainy days during the month, so it makes sense to carry a compact umbrella or light waterproof and keep an indoor alternative in mind. That does not mean every rainy day is a washout, but a completely dry holiday is not guaranteed. Sunshine averages about 9.9 hours within 14.9 hours of daylight, leaving plenty of scope to move outdoor plans away from the hottest part of the day. The useful balance is to plan around warmth and sunshine while leaving enough flexibility to change course if rain arrives.
A little perspective
Naples through the year
June is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sea | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|---|
| January | 12.0°C | 5.8°C | 15.0°C | 4.2 | 107 | 11 | 0% |
| February | 12.4°C | 5.7°C | 14.2°C | 4.9 | 102 | 11 | 0% |
| March | 14.8°C | 7.4°C | 14.1°C | 5.3 | 103 | 11 | 0% |
| April | 17.6°C | 9.8°C | 15.4°C | 6.1 | 96 | 11 | 1% |
| May | 21.7°C | 13.6°C | 18.9°C | 7.6 | 63 | 9 | 15% |
| JuneSelectedbest | 25.9°C | 17.8°C | 22.8°C | 9.9 | 34 | 6 | 61% |
| Julybest | 28.9°C | 20.6°C | 25.5°C | 11.7 | 19 | 4 | 95% |
| Augustbest | 29.5°C | 21.3°C | 26.4°C | 10.6 | 23 | 4 | 96% |
| September | 25.3°C | 18.0°C | 24.4°C | 7.3 | 90 | 9 | 53% |
| October | 21.2°C | 14.4°C | 21.9°C | 5.5 | 134 | 11 | 6% |
| November | 16.7°C | 10.8°C | 19.3°C | 4.1 | 174 | 13 | 0% |
| December | 13.0°C | 7.1°C | 16.9°C | 4.1 | 134 | 12 | 0% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
- Sea
Best months here
On warmth, low rainfall and sunshine, start with these.
Keep exploring
Similar in June
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
A little more detail
Naples in June FAQs
Plain answers, grounded in the averages.
Is Naples hot in June?
Naples is hot in June: the average daytime high is 25.9°C and nights average 17.8°C. About 61% of June days reach 25°C or more.
Can you swim in the sea in Naples in June?
The sea around Naples averages 22.8°C in June, which is warm enough for most people to swim comfortably. Between 1991 and 2020 it ranged from 22°C to 24°C depending on the year.
How much does it rain in Naples in June?
Naples sees about 6 rainy days (1 mm or more) and 34 mm of rain in a typical June. The wettest June between 1991 and 2020 was 2009 (96 mm) and the driest was 2017 (2 mm).
How sunny is Naples in June?
Naples gets around 9.9 hours of sunshine a day in June out of 14.9 hours of daylight (estimated from average cloud cover).
How does Naples compare with the UK in June?
Naples is on average 6.3°C warmer than London by day in June (25.9°C against 19.6°C).
What is the hottest June on record in Naples?
Between 1991 and 2020 the hottest June day in Naples reached 34.6°C on 2006-06-28, and the coldest night dropped to 10.8°C on 2006-06-04.
How much warmer is Naples than London in June?
Naples has an average daytime high of 25.9°C, compared with 19.6°C in London, a difference of 6.3°C. That is a noticeable step up in warmth: pack for summer days and allow for breaks from the midday heat.
Is the sea warm enough to swim in June?
Yes. The average sea temperature is 22.8°C, with a year-to-year range of 22°C to 24°C. That puts June in swimming territory, though personal comfort varies and the water may still feel cool when you first get in.
Will I need a jacket at night?
A light jacket or jumper is sensible. Average night lows are about 18°C, but the coldest nights can fall to around 15°C or lower. You may not need the extra layer every evening, but it is useful if you stay out late.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid) and NOAA Coral Reef Watch 5 km sea temperatures, 1991-2020
Averages computed from daily values at Naples. Sea temperature from the nearest 5 km sea cell, 8.6 km from that point. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C