15.09
tue
tue
Day
79°F
E 6 mph
Precip.
1%
1%
Night
66°F
SE 5 mph
Precip.
9%
9%
16.09
wed
wed
Day
77°F
S 9 mph
Precip.
10%
10%
Night
66°F
SW 7 mph
Precip.
2%
2%
17.09
thu
thu
Day
75°F
S 6 mph
Precip.
9%
9%
Night
66°F
S 6 mph
Precip.
8%
8%
18.09
fri
fri
Day
79°F
SW 6 mph
Precip.
2%
2%
Night
72°F
W 4 mph
Precip.
1%
1%
19.09
sat
sat
Day
84°F
W 7 mph
Precip.
1%
1%
Night
73°F
W 4 mph
Precip.
0%
0%
20.09
sun
sun
Day
86°F
W 6 mph
Precip.
0%
0%
Night
75°F
W 4 mph
Precip.
0%
0%
21.09
mon
mon
Day
88°F
E 2 mph
Precip.
0%
0%
Night
75°F
W 2 mph
Precip.
1%
1%
22.09
tue
tue
Day
86°F
NE 3 mph
Precip.
0%
0%
Night
75°F
W 2 mph
Precip.
4%
4%
23.09
wed
wed
Day
88°F
N 3 mph
Precip.
1%
1%
Night
77°F
SW 3 mph
Precip.
1%
1%
24.09
thu
thu
Day
88°F
NE 5 mph
Precip.
0%
0%
Night
77°F
W 2 mph
Precip.
0%
0%
25.09
fri
fri
Day
82°F
N 7 mph
Precip.
2%
2%
Night
72°F
NE 2 mph
Precip.
11%
11%
26.09
sat
sat
Day
77°F
E 4 mph
Precip.
9%
9%
Night
68°F
NE 2 mph
Precip.
13%
13%
27.09
sun
sun
Day
75°F
NE 6 mph
Precip.
9%
9%
Night
66°F
NE 2 mph
Precip.
11%
11%
28.09
mon
mon
Day
73°F
E 5 mph
Precip.
8%
8%
Night
68°F
NE 2 mph
Precip.
14%
14%
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 61.6°F. The highest and lowest sea temperatures during the month were 65.7°F and 56.3°F.
Air temperature in Porto, °F
Precipitation total in Porto, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Porto
Porto on a weather map
Places in Portugal:
Name
°F
24 Hours Forecast
Porto
Local time: 00:26
September 15, tuesday
0300
68°F
S
1 mph
1 mph
0600
66°F
S
2 mph
2 mph
0900
68°F
SE
1 mph
1 mph
1200
79°F
E
6 mph
6 mph
1500
84°F
E
11 mph
11 mph
1800
79°F
SE
11 mph
11 mph
2100
70°F
E
2 mph
2 mph
September 16, wednesday
0000
66°F
SE
5 mph
5 mph
