Current sea water temperature:
+58.3°F
| Minimum sea water temperature in December: | 61.7°F |
| Maximum sea water temperature in December: | 54.0°F |
| Average sea water temperature in December: | 57.8°F |
| more information | |
14 days
forecast
forecast
| Porto |
monthly
weather
weather
| Porto |
Sea water temperature for the last 10 days:
| December 21 | 58.3°F | December 16 | 58.6°F |
| December 20 | 58.6°F | December 15 | 58.6°F |
| December 19 | 59.2°F | December 14 | 58.8°F |
| December 18 | 59.4°F | December 13 | 58.6°F |
| December 17 | 59.5°F | December 12 | 58.3°F |
Monthly sea water temperature, °F
When is the warmest sea in Porto?
Based on the data about daily sea water temperature for the last three years the warmest sea in Porto was noticed in September, August and July.
Monthly Sea Temperatures in Porto, °F
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 61.6°F. The highest and lowest sea temperatures during the month were 65.7°F and 56.3°F.
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 63.3°F. The highest and lowest sea temperatures during the month were 67.5°F and 59.0°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 62.2°F. The highest and lowest sea temperatures during the month were 66.2°F and 57.7°F.
current
weather
weather
| Porto |
weather in
December
December
| Porto |
Best time for vacation in Porto
Porto on a weather map
Places in Portugal:
Name
°F
24 Hours Forecast
Porto
Local time: 21:09
December 22, monday
0000
46°F
S
4 mph
4 mph
0300
46°F
SE
4 mph
4 mph
0600
46°F
SE
8 mph
8 mph
0900
46°F
S
6 mph
6 mph
1200
50°F
SE
2 mph
2 mph
1500
52°F
SE
14 mph
14 mph
1800
52°F
SE
13 mph
13 mph
2100
50°F
SE
9 mph
9 mph
