Current Sea Water Temperature:
+65.8°F
| Maximum Sea Water Temperature in July: | 70.0°F |
| Minimum Sea Water Temperature in July: | 59.4°F |
| Average water temperature in July: | 65.4°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| July 30 | 65.8°F | July 25 | 69.8°F |
| July 29 | 66.4°F | July 24 | 69.8°F |
| July 28 | 68.0°F | July 23 | 69.8°F |
| July 27 | 68.4°F | July 22 | 70.0°F |
| July 26 | 68.6°F | July 21 | 68.4°F |
When is the Warmest Sea for Cascais?
According to our data for the last three years for Cascais the highest average sea water temperature was in September, October and August.
Average Water Temperature by Month, °F
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Cascais was 64.0°F. The maximum and minimum values were 61.4°F and 67.2°F respectively.
Sea Water Temperature in October
The average sea surface temperature in October 2025 for Cascais was 64.7°F. The maximum and minimum values were 62.8°F and 67.6°F respectively.
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Cascais was 66.9°F. The maximum and minimum values were 64.8°F and 69.4°F respectively.
Portugal Resorts:
NAME
F°
| Albufeira |  |
+82 |
| Algarve | |
+76 |
| Cascais | |
+74 |
| Ericeira | |
+76 |
| Faro | |
+76 |
| Funchal |  |
+76 |
| Lagos | |
+82 |
| Lisbon | |
+80 |
| Madeira | |
+76 |
| Ponta Delgada |  |
+78 |
| Portimao | |
+86 |
| Porto | |
+72 |
| Quarteira | |
+82 |
| Sao Miguel | |
+78 |
| Setubal | |
+84 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Cascais
Local time: 11:51
30 jul, thursday
| 1200 |  |
74°F | SE 13 mph |
| 1500 | |
74°F | SE 16 mph |
| 1800 |  |
74°F | SE 19 mph |
| 2100 |  |
70°F | S 17 mph |
31 jul, friday
| 0000 | |
70°F | S 15 mph |
| 0300 | |
68°F | S 14 mph |
| 0600 | |
68°F | S 16 mph |
| 0900 | |
70°F | S 14 mph |