Weather in Cascais: May
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Average day temperature: | 68.1°F |
| Average night temperature: | 60.3°F | |
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Sea water temperature: | 61.2°F |
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Number of sunny days: | 21 days |
| Day length: | 13.8 - 14.7 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.2 in. | |
| more information | ||
14 days
forecast
forecast
| Cascais |
sea water
temperature
temperature
| Cascais |
Air temperature in May, °F
Show year:
2025
2024
2023
The highest day temperature during May of 2025 was 76°F. At the same time the lowest night temperature was 54°F. Daily and nightly averages during May were 66.0°F and 59.7°F.
Sea water temperature in Cascais in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 61.8°F. The highest and lowest sea temperatures during the month were 63.5°F and 60.3°F.
Sunny, partly cloudy and cloudy days
Mostly all days in May are sunny but cloudy days are also possible.
Precipitation total in May, in.
Precipitation total value in Cascais in May is 0.8 in. Other months of the year show relatively similar values.
Wind speed in May, mph
The average wind speed value in May is 12.8 mph
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in May is: 10.3.
Best time for vacation in Cascais
Cascais on a weather map
Places in Portugal:
Name
°F
24 Hours Forecast
Cascais
Local time: 09:30
January 01, thursday
1200
57°F
NW
21 mph
21 mph
1500
59°F
NW
22 mph
22 mph
1800
61°F
NW
24 mph
24 mph
2100
61°F
NW
29 mph
29 mph
January 02, friday
0000
61°F
NW
33 mph
33 mph
0300
59°F
NW
27 mph
27 mph
0600
59°F
N
27 mph
27 mph
0900
59°F
N
25 mph
25 mph
