Current Sea Water Temperature:
+59.8°F
| Maximum Sea Water Temperature in December: | 63.0°F |
| Minimum Sea Water Temperature in December: | 54.4°F |
| Average water temperature in December: | 58.6°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| December 14 | 59.8°F | December 09 | 60.2°F |
| December 13 | 59.6°F | December 08 | 60.4°F |
| December 12 | 59.2°F | December 07 | 60.6°F |
| December 11 | 59.2°F | December 06 | 60.8°F |
| December 10 | 60.0°F | December 05 | 60.8°F |
When is the Warmest Sea for Porto?
According to our data for the last three years for Porto the highest average sea water temperature was in September, August and July.
Average Water Temperature by Month, °F
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Porto was 62.9°F. The maximum and minimum values were 57.0°F and 67.4°F respectively.
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Porto was 64.7°F. The maximum and minimum values were 60.0°F and 69.4°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Porto was 63.5°F. The maximum and minimum values were 58.6°F and 68.0°F respectively.
Portugal Resorts:
NAME
F°
| Albufeira |  |
+54 |
| Algarve | |
+56 |
| Cascais |  |
+54 |
| Faro | |
+56 |
| Funchal |  |
+60 |
| Lagos | |
+54 |
| Lisbon | |
+50 |
| Madeira | |
+60 |
| Ponta Delgada |  |
+66 |
| Portimao | |
+52 |
| Porto | |
+50 |
| Porto Santo Island |  |
+68 |
| Quarteira | |
+54 |
| Sao Miguel | |
+66 |
| Terceira Island | |
+64 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Porto
Local time: 10:18
14 dec, sunday
| 1200 |  |
58°F | W 3 mph |
| 1500 |  |
60°F | NW 3 mph |
| 1800 |  |
56°F | E 2 mph |
| 2100 |  |
56°F | NW 4 mph |
15 dec, monday
| 0000 | |
54°F | NW 5 mph |
| 0300 |  |
52°F | NW 5 mph |
| 0600 | |
52°F | NW 6 mph |
| 0900 | |
54°F | N 8 mph |