20.09
sun
sun
Day
70°F
S 3 mph
Precip.
2%
2%
Night
63°F
N 3 mph
Precip.
12%
12%
21.09
mon
mon
Day
72°F
SW 2 mph
Precip.
10%
10%
Night
64°F
NE 4 mph
Precip.
10%
10%
22.09
tue
tue
Day
72°F
S 4 mph
Precip.
2%
2%
Night
63°F
N 3 mph
Precip.
2%
2%
23.09
wed
wed
Day
73°F
S 1 mph
Precip.
1%
1%
Night
64°F
N 3 mph
Precip.
6%
6%
24.09
thu
thu
Day
79°F
NW 3 mph
Precip.
0%
0%
Night
70°F
NE 3 mph
Precip.
2%
2%
25.09
fri
fri
Day
73°F
S 3 mph
Precip.
1%
1%
Night
63°F
N 1 mph
Precip.
14%
14%
26.09
sat
sat
Day
66°F
SE 2 mph
Precip.
9%
9%
Night
70°F
N 2 mph
Precip.
9%
9%
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 69.8°F. The highest and lowest sea temperatures during the month were 71.1°F and 68.4°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 65.3°F. The highest and lowest sea temperatures during the month were 67.6°F and 63.5°F.
Air temperature in Bilbao, °F
Precipitation total in Bilbao, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Bilbao
Bilbao on a weather map
Places in Spain:
Name
°F
24 Hours Forecast
Bilbao
Local time: 04:59
September 20, sunday
0600
59°F
N
3 mph
3 mph
0900
59°F
N
2 mph
2 mph
1200
70°F
S
3 mph
3 mph
1500
73°F
S
6 mph
6 mph
1800
70°F
S
6 mph
6 mph
2100
64°F
SE
2 mph
2 mph
September 21, monday
0000
63°F
N
3 mph
3 mph
0300
61°F
NE
4 mph
4 mph
