01.09
tue
tue
Day
79°F
NE 6 mph
Precip.
3%
3%
Night
79°F
SE 7 mph
Precip.
5%
5%
02.09
wed
wed
Day
79°F
NE 6 mph
Precip.
4%
4%
Night
77°F
S 4 mph
Precip.
4%
4%
03.09
thu
thu
Day
79°F
N 7 mph
Precip.
4%
4%
Night
81°F
W 6 mph
Precip.
4%
4%
04.09
fri
fri
Day
82°F
NE 9 mph
Precip.
2%
2%
Night
81°F
S 6 mph
Precip.
3%
3%
05.09
sat
sat
Day
81°F
N 5 mph
Precip.
1%
1%
Night
77°F
SE 9 mph
Precip.
5%
5%
06.09
sun
sun
Day
81°F
NE 7 mph
Precip.
3%
3%
Night
79°F
SE 5 mph
Precip.
4%
4%
07.09
mon
mon
Day
81°F
NE 7 mph
Precip.
2%
2%
Night
77°F
SE 7 mph
Precip.
4%
4%
08.09
tue
tue
Day
79°F
NE 7 mph
Precip.
2%
2%
Night
75°F
SE 6 mph
Precip.
6%
6%
09.09
wed
wed
Day
77°F
N 6 mph
Precip.
4%
4%
Night
75°F
N 4 mph
Precip.
16%
16%
10.09
thu
thu
Day
77°F
N 7 mph
Precip.
6%
6%
Night
77°F
N 3 mph
Precip.
12%
12%
11.09
fri
fri
Day
79°F
NE 6 mph
Precip.
3%
3%
Night
75°F
W 6 mph
Precip.
14%
14%
12.09
sat
sat
Day
77°F
N 7 mph
Precip.
15%
15%
Night
77°F
SW 6 mph
Precip.
16%
16%
13.09
sun
sun
Day
79°F
N 7 mph
Precip.
10%
10%
Night
79°F
SW 4 mph
Precip.
16%
16%
14.09
mon
mon
Day
77°F
N 5 mph
Precip.
15%
15%
Night
75°F
SE 7 mph
Precip.
19%
19%
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 77.6°F. The highest and lowest sea temperatures during the month were 79.3°F and 75.4°F.
Air temperature in Formia, °F
Precipitation total in Formia, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Formia
Formia on a weather map
Places in Italy:
Name
°F
24 Hours Forecast
Formia
Local time: 20:18
September 01, tuesday
2100
81°F
E
12 mph
12 mph
September 02, wednesday
0000
79°F
SE
7 mph
7 mph
0300
77°F
S
4 mph
4 mph
0600
77°F
SW
2 mph
2 mph
0900
79°F
NW
3 mph
3 mph
1200
79°F
NE
6 mph
6 mph
1500
82°F
E
13 mph
13 mph
1800
81°F
E
11 mph
11 mph
