17.09
thu
thu
Day
77°F
N 6 mph
Precip.
16%
16%
Night
77°F
NE 4 mph
Precip.
5%
5%
18.09
fri
fri
Day
75°F
N 7 mph
Precip.
15%
15%
Night
77°F
SE 1 mph
Precip.
15%
15%
19.09
sat
sat
Day
77°F
NE 6 mph
Precip.
8%
8%
Night
77°F
SE 4 mph
Precip.
4%
4%
20.09
sun
sun
Day
79°F
NE 4 mph
Precip.
2%
2%
Night
77°F
E 7 mph
Precip.
5%
5%
21.09
mon
mon
Day
77°F
NE 6 mph
Precip.
8%
8%
Night
77°F
E 6 mph
Precip.
12%
12%
22.09
tue
tue
Day
77°F
NE 7 mph
Precip.
9%
9%
Night
77°F
NW 3 mph
Precip.
6%
6%
23.09
wed
wed
Day
77°F
W 7 mph
Precip.
3%
3%
Night
75°F
SW 6 mph
Precip.
2%
2%
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 83.8°F. The highest and lowest sea temperatures during the month were 85.3°F and 80.6°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 70.3°F. The highest and lowest sea temperatures during the month were 75.6°F and 68.0°F.
Air temperature in Naples, °F
Precipitation total in Naples, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Naples
Naples on a weather map
Places in Italy:
Name
°F
24 Hours Forecast
Naples
Local time: 08:24
September 17, thursday
0900
75°F
NW
6 mph
6 mph
1200
77°F
N
6 mph
6 mph
1500
79°F
NE
7 mph
7 mph
1800
79°F
NE
5 mph
5 mph
2100
77°F
NE
2 mph
2 mph
September 18, friday
0000
77°F
NE
4 mph
4 mph
0300
77°F
N
3 mph
3 mph
0600
75°F
N
4 mph
4 mph
