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:
2026
2025
2024
The average sea water temperature in September of 2026 was 64.6°F. The highest and lowest sea temperatures during the month were 66.9°F and 62.1°F.
Monthly sea water temperature in Cascais, °F
Which Portugal resorts have warmest sea in September?
| Place name | September 2026 | September 2025 |
|---|---|---|
| Madeira | 76.8°F | 74.6°F |
| Funchal | 76.8°F | 74.6°F |
| Canico | 76.3°F | 74.3°F |
| Corvo Island | 75.7°F | 72.6°F |
| Porto Santo Island | 75.6°F | 74.1°F |
| Pico Island | 75.5°F | 73.1°F |
| Sao Jorge | 75.5°F | 73.3°F |
| Faial Island | 75.5°F | 73.1°F |
| Flores Island | 75.4°F | 72.8°F |
| Santa Maria Island | 75.3°F | 73.7°F |
| Ponta Delgada | 75.2°F | 73.1°F |
| Graciosa | 75.2°F | 72.7°F |
| Terceira Island | 75.0°F | 72.6°F |
| Sao Miguel | 74.8°F | 72.9°F |
| Tavira | 72.3°F | 66.5°F |
| Algarve | 71.7°F | 67.0°F |
| Faro | 71.7°F | 67.0°F |
| Quarteira | 70.9°F | 66.0°F |
| Albufeira | 70.6°F | 65.5°F |
| Portimao | 70.2°F | 65.1°F |
Best time for vacation in Cascais
Cascais on a weather map
Places in Portugal:
Name
°F
24 Hours Forecast
Cascais
Local time: 13:17
October 26, monday
1500
63°F
E
6 mph
6 mph
1800
61°F
SE
6 mph
6 mph
2100
59°F
SE
5 mph
5 mph
October 27, tuesday
0000
59°F
SE
4 mph
4 mph
0300
59°F
NW
1 mph
1 mph
0600
59°F
NW
2 mph
2 mph
0900
63°F
NW
4 mph
4 mph
1200
66°F
E
2 mph
2 mph
