14.09
mon
mon
Day
79°F
SW 6 mph
Precip.
2%
2%
Night
70°F
S 3 mph
Precip.
10%
10%
15.09
tue
tue
Day
79°F
SW 12 mph
Precip.
6%
6%
Night
70°F
S 7 mph
Precip.
11%
11%
16.09
wed
wed
Day
77°F
SW 19 mph
Precip.
1%
1%
Night
66°F
S 6 mph
Precip.
3%
3%
17.09
thu
thu
Day
77°F
SW 12 mph
Precip.
1%
1%
Night
68°F
S 5 mph
Precip.
1%
1%
18.09
fri
fri
Day
79°F
S 2 mph
Precip.
1%
1%
Night
70°F
E 3 mph
Precip.
3%
3%
19.09
sat
sat
Day
82°F
NE 2 mph
Precip.
1%
1%
Night
72°F
SE 2 mph
Precip.
4%
4%
20.09
sun
sun
Day
84°F
S 11 mph
Precip.
6%
6%
Night
73°F
S 6 mph
Precip.
1%
1%
21.09
mon
mon
Day
82°F
S 22 mph
Precip.
1%
1%
Night
72°F
S 9 mph
Precip.
2%
2%
22.09
tue
tue
Day
81°F
S 16 mph
Precip.
1%
1%
Night
68°F
S 6 mph
Precip.
3%
3%
23.09
wed
wed
Day
81°F
SE 1 mph
Precip.
0%
0%
Night
70°F
E 2 mph
Precip.
3%
3%
24.09
thu
thu
Day
82°F
SW 1 mph
Precip.
1%
1%
Night
72°F
S 2 mph
Precip.
2%
2%
25.09
fri
fri
Day
81°F
N 2 mph
Precip.
1%
1%
Night
70°F
SW 2 mph
Precip.
2%
2%
26.09
sat
sat
Day
77°F
S 9 mph
Precip.
1%
1%
Night
64°F
S 9 mph
Precip.
3%
3%
27.09
sun
sun
Day
70°F
SW 24 mph
Precip.
10%
10%
Night
66°F
S 16 mph
Precip.
12%
12%
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 78.2°F. The highest and lowest sea temperatures during the month were 79.9°F and 75.4°F.
Air temperature in Piraeus, °F
Precipitation total in Piraeus, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Piraeus
Piraeus on a weather map
Places in Greece:
Name
°F
24 Hours Forecast
Piraeus
Local time: 18:29
September 14, monday
2100
72°F
SW
6 mph
6 mph
September 15, tuesday
0000
70°F
S
3 mph
3 mph
0300
70°F
S
4 mph
4 mph
0600
66°F
SW
9 mph
9 mph
0900
72°F
S
9 mph
9 mph
1200
79°F
SW
12 mph
12 mph
1500
77°F
SW
14 mph
14 mph
1800
73°F
SW
12 mph
12 mph
