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Sea Temperature in Cascais in September
Complete information on the sea temperature range in the Atlantic Ocean in Cascais in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Cascais. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Water Temperature Range in Cascais in September
16°C
MINIMUN
19°C
AVERAGE
22°C
MAXIMUM
Historical Data of Water Temperature in September in Cascais
Water Temperature Chart for Atlantic Ocean in Cascais in September
Sea Temperature Table in Cascais in September Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Sep 1 | 20°C | 20°C | 19°C | 19.0°C |
| Sep 2 | 19°C | 19°C | 20°C | 18.8°C |
| Sep 3 | 19°C | 19°C | 18°C | 18.3°C |
| Sep 4 | 20°C | 19°C | 19°C | 18.8°C |
| Sep 5 | 20°C | 19°C | 22°C | 19.5°C |
| Sep 6 | 20°C | 19°C | 21°C | 19.3°C |
| Sep 7 | 19°C | 19°C | 18°C | 18.3°C |
| Sep 8 | 20°C | 19°C | 20°C | 18.8°C |
| Sep 9 | 20°C | 19°C | 19°C | 18.5°C |
| Sep 10 | 20°C | 19°C | 20°C | 19.0°C |
| Sep 11 | 20°C | 19°C | 20°C | 19.0°C |
| Sep 12 | 20°C | 19°C | 18°C | 18.3°C |
| Sep 13 | 21°C | 19°C | 20°C | 19.0°C |
| Sep 14 | 21°C | 19°C | 21°C | 19.5°C |
| Sep 15 | 21°C | 19°C | 19°C | 19.0°C |
| Sep 16 | 21°C | 20°C | 20°C | 19.5°C |
| Sep 17 | 21°C | 20°C | 22°C | 20.0°C |
| Sep 18 | 20°C | 20°C | 20°C | 19.3°C |
| Sep 19 | 20°C | 20°C | 22°C | 19.8°C |
| Sep 20 | 20°C | 20°C | 18°C | 19.0°C |
| Sep 21 | 19°C | 19°C | 20°C | 19.0°C |
| Sep 22 | 19°C | 20°C | 18°C | 18.5°C |
| Sep 23 | 19°C | 20°C | 20°C | 19.3°C |
| Sep 24 | 18°C | 20°C | 22°C | 19.5°C |
| Sep 25 | 19°C | 21°C | 19°C | 19.3°C |
| Sep 26 | 18°C | 20°C | 20°C | 19.0°C |
| Sep 27 | 19°C | 21°C | 21°C | 19.8°C |
| Sep 28 | 18°C | 19°C | 22°C | 19.3°C |
| Sep 29 | 19°C | 19°C | 20°C | 19.0°C |
Cascais Climate and Swimming Opportunities in September
23°C
Average Day Air Temperature
15°C
Average Night Air Temperature
30 mm
Precipitation Amount per Month
5 days
Number of Rainy Days
12 hrs
Daylight
per Day
8 hrs
Sunshine
per Day
13 km/h
Average Wind Speed
69%
Average
humidity
Cascais lies within the Lisbon metropolitan area in Portugal. The average daytime temperature in Cascais in September is 23°C (73°F), while the nighttime average is 15°C (60°F). There are typically five rainy days during the month, with a total precipitation of 30 mm (1.2 inches). The daylight duration in September in Cascais is 12 hours, with an average of 8 hours of sunshine per day. The average wind speed in September is 13 km/h (8 mph), and the humidity level is around 69%.
The water temperature in Cascais in September ranges from 18°C to 20°C (64°F to 68°F). At the beginning of the month, the average temperature is around 19°C (66°F), shifting to 19°C (66°F) by mid-September and reaching 19°C (66°F) in the last ten days. Overall, the average sea temperature in Cascais for September is 19°C (66°F). Very comfortable swimming conditions. The water is fresh but not too cold, and the air temperature is pleasant.
Sea Temperature in September in Nearby Cities
Frequently Asked Questions About Water Temperatures in September in Cascais
What is the sea temperature in Cascais in September?
The water temperature in the Atlantic Ocean in Cascais in September ranges from 18°C to 20°C (64°F to 68°F).
Is it possible to swim in the Atlantic Ocean in Cascais in September?
The average sea temperature in Cascais in September is 19°C (66°F), and the air temperature is 23°C (73°F), so very comfortable swimming conditions. The water is fresh but not too cold, and the air temperature is pleasant.