Current Sea Water Temperature:
+68.2°F
| Maximum Sea Water Temperature in May: | 70.8°F |
| Minimum Sea Water Temperature in May: | 60.0°F |
| Average water temperature in May: | 64.5°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| May 29 | 68.2°F | May 24 | 67.0°F |
| May 28 | 67.6°F | May 23 | 66.6°F |
| May 27 | 67.2°F | May 22 | 66.4°F |
| May 26 | 67.0°F | May 21 | 64.8°F |
| May 25 | 66.6°F | May 20 | 63.8°F |
When is the Warmest Sea for Lisbon?
According to our data for the last three years for Lisbon the highest average sea water temperature was in August, July and September.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Lisbon was 72.4°F. The maximum and minimum values were 70.2°F and 75.0°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Lisbon was 71.3°F. The maximum and minimum values were 67.2°F and 74.8°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Lisbon was 67.7°F. The maximum and minimum values were 64.4°F and 71.4°F respectively.
Portugal Resorts:
NAME
F°
| Albufeira |  |
+76 |
| Algarve | |
+76 |
| Cascais | |
+66 |
| Faro | |
+76 |
| Funchal | |
+62 |
| Lagos | |
+74 |
| Lisbon | |
+68 |
| Madeira | |
+62 |
| Ponta Delgada |  |
+66 |
| Portimao | |
+74 |
| Porto | |
+66 |
| Porto Santo Island | |
+66 |
| Quarteira | |
+76 |
| Sao Miguel | |
+66 |
| Setubal | |
+70 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Lisbon
Local time: 07:38
30 may, saturday
| 0900 |  |
68°F | S 8 mph |
| 1200 | |
78°F | S 11 mph |
| 1500 | |
82°F | SE 14 mph |
| 1800 |  |
76°F | S 17 mph |
| 2100 |  |
66°F | S 12 mph |
31 may, sunday
| 0000 |  |
62°F | S 9 mph |
| 0300 | |
62°F | S 11 mph |
| 0600 | |
60°F | S 6 mph |