25.09
fri
fri
Day
70°F
W 1 mph
Precip.
6%
6%
Night
66°F
N 1 mph
Precip.
11%
11%
26.09
sat
sat
Day
70°F
S 9 mph
Precip.
11%
11%
Night
63°F
S 9 mph
Precip.
24%
24%
27.09
sun
sun
Day
70°F
S 22 mph
Precip.
2%
2%
Night
63°F
S 6 mph
Precip.
3%
3%
28.09
mon
mon
Day
72°F
S 12 mph
Precip.
1%
1%
Night
64°F
SE 4 mph
Precip.
1%
1%
29.09
tue
tue
Day
72°F
SW 6 mph
Precip.
1%
1%
Night
64°F
SW 5 mph
Precip.
27%
27%
30.09
wed
wed
Day
68°F
SW 10 mph
Precip.
17%
17%
Night
63°F
SW 5 mph
Precip.
18%
18%
01.10
thu
thu
Day
68°F
S 8 mph
Precip.
13%
13%
Night
61°F
S 6 mph
Precip.
7%
7%
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 79.5°F. The highest and lowest sea temperatures during the month were 81.7°F and 77.0°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 73.4°F. The highest and lowest sea temperatures during the month were 75.7°F and 72.0°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: 07:58
September 25, friday
0900
64°F
SW
5 mph
5 mph
1200
70°F
W
1 mph
1 mph
1500
72°F
NE
10 mph
10 mph
1800
70°F
N
6 mph
6 mph
2100
68°F
N
3 mph
3 mph
September 26, saturday
0000
66°F
N
1 mph
1 mph
0300
64°F
SW
4 mph
4 mph
0600
63°F
SW
6 mph
6 mph
