Measurements:
°C
°F
CURRENT WEATHER
01:25
Sintra
70°F
SE 13 mph
Feels like: 70°F
Precip: 27%
World Resorts Portugal Sintra Weather

7 Day Weather Forecast

09.09
wed
DAY
66°F
S 21 mph
precip
7%
NIGHT
66°F
S 24 mph
precip
15%
09.10
thu
DAY
68°F
S 19 mph
precip
8%
NIGHT
66°F
S 22 mph
precip
11%
09.11
fri
DAY
70°F
S 13 mph
precip
7%
NIGHT
68°F
S 18 mph
precip
14%
09.12
sat
DAY
74°F
S 10 mph
precip
8%
NIGHT
76°F
S 15 mph
precip
4%
09.13
sun
DAY
82°F
SW 1 mph
precip
2%
NIGHT
76°F
S 11 mph
precip
4%
09.14
mon
DAY
78°F
N 9 mph
precip
4%
NIGHT
76°F
SE 6 mph
precip
13%
09.15
tue
DAY
78°F
NE 8 mph
precip
4%
NIGHT
72°F
S 12 mph
precip
12%

Sintra Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Sintra was 17.0°F. The maximum and minimum values were 15.7°F and 18.9°F respectively.

Sintra on the Weather Map

Best Time to Visit Sintra
The most sunny months:
August 27 days
July 26 days
September 23 days
The most warm months:
August 81.2 °F
July 80.6 °F
September 79.6 °F
Warmest sea temperature:
September 66.2 °F
October 65.7 °F
August 65.6 °F
The most cold months:
January 59.7 °F
February 60.4 °F
December 61.8 °F
The most rainy months:
March 4 days
November 4 days
January 4 days
The most windy months:
July 12 mph
August 12 mph
June 12 mph
more details