Current sea water temperature:
+64.0°F
| Minimum sea water temperature in September: | 69.4°F |
| Maximum sea water temperature in September: | 59.0°F |
| Average sea water temperature in September: | 64.7°F |
| more information | |
14 days
forecast
forecast
| Cascais |
monthly
weather
weather
| Cascais |
Sea water temperature for the last 10 days:
| September 15 | 64.0°F | September 10 | 64.8°F |
| September 14 | 63.7°F | September 9 | 66.6°F |
| September 13 | 63.9°F | September 8 | 66.9°F |
| September 12 | 64.8°F | September 7 | 66.7°F |
| September 11 | 64.0°F | September 6 | 66.0°F |
Monthly sea water temperature, °F
When is the warmest sea in Cascais?
Based on the data about daily sea water temperature for the last three years the warmest sea in Cascais was noticed in September, October and August.
Monthly Sea Temperatures in Cascais, °F
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 65.2°F. The highest and lowest sea temperatures during the month were 66.9°F and 63.7°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 63.2°F. The highest and lowest sea temperatures during the month were 65.8°F and 61.5°F.
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 65.8°F. The highest and lowest sea temperatures during the month were 67.5°F and 63.7°F.
current
weather
weather
| Cascais |
weather in
September
September
| Cascais |
Best time for vacation in Cascais
Cascais on a weather map
Places in Portugal:
Name
°F
24 Hours Forecast
Cascais
Local time: 05:42
September 16, wednesday
0600
66°F
S
31 mph
31 mph
0900
64°F
S
29 mph
29 mph
1200
66°F
S
29 mph
29 mph
1500
66°F
S
30 mph
30 mph
1800
66°F
S
32 mph
32 mph
2100
66°F
S
32 mph
32 mph
September 17, thursday
0000
66°F
S
29 mph
29 mph
0300
66°F
S
27 mph
27 mph
