Average sea water temperature in September:
+64.7°F
| Minimum sea water temperature in September: | 69.4°F |
| Maximum sea water temperature in September: | 59.0°F |
Daily sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 62.6°F. The highest and lowest sea temperatures during the month were 65.5°F and 60.3°F.
Monthly sea water temperature in Cascais, °F
Which Portugal resorts have warmest sea in September?
| Place name | September 2025 | September 2024 |
|---|---|---|
| Madeira | 74.6°F | 74.8°F |
| Funchal | 74.6°F | 74.8°F |
| Canico | 74.3°F | 74.6°F |
| Porto Santo Island | 74.1°F | 74.1°F |
| Santa Maria Island | 73.7°F | 75.6°F |
| Sao Jorge | 73.3°F | 75.3°F |
| Pico Island | 73.1°F | 75.2°F |
| Ponta Delgada | 73.1°F | 75.8°F |
| Faial Island | 73.1°F | 75.2°F |
| Sao Miguel | 72.9°F | 75.5°F |
| Flores Island | 72.8°F | 75.4°F |
| Graciosa | 72.7°F | 75.1°F |
| Terceira Island | 72.6°F | 74.6°F |
| Corvo Island | 72.6°F | 75.2°F |
| Algarve | 67.0°F | 68.3°F |
| Faro | 67.0°F | 68.3°F |
| Tavira | 66.5°F | 69.0°F |
| Quarteira | 66.0°F | 66.9°F |
| Lisbon | 65.9°F | 65.1°F |
| Albufeira | 65.5°F | 66.7°F |
Best time for vacation in Cascais
Cascais on a weather map
Places in Portugal:
Name
°F
24 Hours Forecast
Cascais
Local time: 21:10
December 22, monday
0000
52°F
SE
15 mph
15 mph
0300
52°F
SE
15 mph
15 mph
0600
50°F
S
16 mph
16 mph
0900
52°F
S
15 mph
15 mph
1200
55°F
S
16 mph
16 mph
1500
57°F
SE
18 mph
18 mph
1800
55°F
SE
17 mph
17 mph
2100
55°F
SE
16 mph
16 mph
