Measurements:
°C
°F
CURRENT WEATHER
06:10
Porto
68°F
S 2 mph
Feels like: 68°F
Precip: 5%
World Resorts Portugal Porto Weather

7 Day Weather Forecast

09.15
tue
DAY
82°F
E 6 mph
precip
1%
NIGHT
68°F
SE 5 mph
precip
9%
09.16
wed
DAY
80°F
S 9 mph
precip
10%
NIGHT
68°F
SW 7 mph
precip
2%
09.17
thu
DAY
78°F
S 6 mph
precip
9%
NIGHT
68°F
S 6 mph
precip
8%
09.18
fri
DAY
82°F
SW 6 mph
precip
2%
NIGHT
74°F
W 4 mph
precip
1%
09.19
sat
DAY
88°F
W 7 mph
precip
1%
NIGHT
76°F
W 4 mph
precip
0%
09.20
sun
DAY
90°F
W 6 mph
precip
0%
NIGHT
78°F
W 4 mph
precip
0%
09.21
mon
DAY
92°F
E 2 mph
precip
0%
NIGHT
78°F
W 2 mph
precip
1%

Porto Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Porto was 16.4°F. The maximum and minimum values were 13.5°F and 18.7°F respectively.

Porto on the Weather Map

Best Time to Visit Porto
The most sunny months:
August 25 days
July 24 days
September 21 days
The most warm months:
August 80.8 °F
July 80.4 °F
September 78.3 °F
Warmest sea temperature:
September 64.8 °F
August 64.6 °F
July 64.2 °F
The most cold months:
January 56.9 °F
February 58.3 °F
December 59.3 °F
The most rainy months:
November 9 days
December 8 days
October 8 days
The most windy months:
February 8 mph
March 8 mph
January 8 mph
more details