17.05
sun
sun
Day

63°F
SE 7 mph
Precip.
79%
79%
Night

55°F
SE 9 mph
Precip.
0%
0%
18.05
mon
mon
Day

61°F
E 7 mph
Precip.
0%
0%
Night

59°F
N 2 mph
Precip.
0%
0%
19.05
tue
tue
Day

64°F
E 4 mph
Precip.
0%
0%
Night

61°F
S 4 mph
Precip.
0%
0%
20.05
wed
wed
Day

75°F
SE 3 mph
Precip.
0%
0%
Night

66°F
SE 2 mph
Precip.
0%
0%
21.05
thu
thu
Day

73°F
NE 6 mph
Precip.
0%
0%
Night

70°F
SW 4 mph
Precip.
0%
0%
22.05
fri
fri
Day

81°F
E 4 mph
Precip.
0%
0%
Night

72°F
SW 7 mph
Precip.
0%
0%
23.05
sat
sat
Day

81°F
NE 7 mph
Precip.
0%
0%
Night

72°F
W 4 mph
Precip.
0%
0%
Sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 61.5°F. The highest and lowest sea temperatures during the month were 63.1°F and 60.3°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: 00:34
May 17, sunday
0300

54°F
S
7 mph
7 mph
0600

52°F
SW
3 mph
3 mph
0900

55°F
S
4 mph
4 mph
1200

63°F
SE
7 mph
7 mph
1500

63°F
SE
15 mph
15 mph
1800

61°F
SE
16 mph
16 mph
2100

57°F
SE
13 mph
13 mph
May 18, monday
0000

55°F
SE
9 mph
9 mph



























