16.09
wed
wed
Day
64°F
S 29 mph
Precip.
9%
9%
Night
64°F
S 29 mph
Precip.
25%
25%
17.09
thu
thu
Day
66°F
S 25 mph
Precip.
9%
9%
Night
64°F
S 28 mph
Precip.
12%
12%
18.09
fri
fri
Day
66°F
S 19 mph
Precip.
13%
13%
Night
68°F
S 19 mph
Precip.
9%
9%
19.09
sat
sat
Day
75°F
NW 6 mph
Precip.
2%
2%
Night
70°F
S 14 mph
Precip.
8%
8%
20.09
sun
sun
Day
75°F
NW 5 mph
Precip.
3%
3%
Night
70°F
S 10 mph
Precip.
8%
8%
21.09
mon
mon
Day
73°F
N 9 mph
Precip.
6%
6%
Night
70°F
S 10 mph
Precip.
8%
8%
22.09
tue
tue
Day
72°F
SE 4 mph
Precip.
5%
5%
Night
70°F
NW 12 mph
Precip.
11%
11%
23.09
wed
wed
Day
72°F
NE 9 mph
Precip.
7%
7%
Night
70°F
S 9 mph
Precip.
11%
11%
24.09
thu
thu
Day
72°F
N 3 mph
Precip.
6%
6%
Night
70°F
S 9 mph
Precip.
24%
24%
25.09
fri
fri
Day
72°F
S 12 mph
Precip.
14%
14%
Night
66°F
S 17 mph
Precip.
12%
12%
26.09
sat
sat
Day
66°F
S 19 mph
Precip.
12%
12%
Night
64°F
S 23 mph
Precip.
14%
14%
27.09
sun
sun
Day
64°F
S 21 mph
Precip.
23%
23%
Night
64°F
S 21 mph
Precip.
25%
25%
28.09
mon
mon
Day
66°F
S 10 mph
Precip.
22%
22%
Night
63°F
S 12 mph
Precip.
26%
26%
29.09
tue
tue
Day
64°F
S 11 mph
Precip.
12%
12%
Night
64°F
S 15 mph
Precip.
15%
15%
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 64.6°F. The highest and lowest sea temperatures during the month were 66.0°F and 63.0°F.
Air temperature in Sintra, °F
Precipitation total in Sintra, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Sintra
Sintra on a weather map
Places in Portugal:
Name
°F
24 Hours Forecast
Sintra
Local time: 15:39
September 16, wednesday
1800
64°F
S
34 mph
34 mph
2100
64°F
S
31 mph
31 mph
September 17, thursday
0000
64°F
S
29 mph
29 mph
0300
64°F
S
27 mph
27 mph
0600
64°F
S
17 mph
17 mph
0900
66°F
S
14 mph
14 mph
1200
66°F
S
25 mph
25 mph
1500
66°F
S
27 mph
27 mph
