14.09
mon
mon
Day
77°F
NE 4 mph
Precip.
12%
12%
Night
77°F
S 7 mph
Precip.
5%
5%
15.09
tue
tue
Day
79°F
N 4 mph
Precip.
2%
2%
Night
77°F
SE 6 mph
Precip.
4%
4%
16.09
wed
wed
Day
79°F
N 7 mph
Precip.
4%
4%
Night
77°F
E 4 mph
Precip.
4%
4%
17.09
thu
thu
Day
79°F
N 14 mph
Precip.
36%
36%
Night
77°F
N 9 mph
Precip.
40%
40%
18.09
fri
fri
Day
75°F
NW 11 mph
Precip.
48%
48%
Night
75°F
NE 7 mph
Precip.
13%
13%
19.09
sat
sat
Day
75°F
NW 4 mph
Precip.
18%
18%
Night
75°F
SW 4 mph
Precip.
5%
5%
20.09
sun
sun
Day
77°F
W 5 mph
Precip.
2%
2%
Night
75°F
NE 7 mph
Precip.
4%
4%
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 76.8°F. The highest and lowest sea temperatures during the month were 77.9°F and 74.7°F.
Air temperature in Ostia, °F
Precipitation total in Ostia, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Ostia
Ostia on a weather map
Places in Italy:
Name
°F
24 Hours Forecast
Ostia
Local time: 22:40
September 15, tuesday
0000
77°F
S
7 mph
7 mph
0300
73°F
SW
7 mph
7 mph
0600
72°F
SW
9 mph
9 mph
0900
73°F
SW
7 mph
7 mph
1200
79°F
N
4 mph
4 mph
1500
79°F
NE
8 mph
8 mph
1800
79°F
E
11 mph
11 mph
2100
77°F
SE
10 mph
10 mph
