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Cascais weather in May 2025
Expect 21°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Cascais in May. Check more long-term weather averages for Cascais in May before you book your next holiday to Portugal in 2025/2026.
- 21°C max day temperature
21 - 9 hours of sunshine per day
- 9 days with some rainfall
9 - 13°C min night temperature
13 - 14 hours of daylight per day
14 - No heat & humidity
0 - 46 mm of monthly rainfall
46 - 8 (Very High) UV index
8 - 16°C sea temperature
16
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The May weather guide for Portugal (Cascais) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about Portugal
How hot is it in Cascais in May?
Daytime temperatures usually reach 21°C in Cascais in May, falling to 13°C at night.
How sunny is it in Cascais in May?
There are normally 9 hours of bright sunshine each day in Cascais in May - that's 65% of daylight hours.
How warm is the sea around Cascais in May?
The average sea temperature around Cascais in May is 16°C.
Does it rain in Cascais in May?
There are usually 9 days with some rain in Cascais in May and the average monthly rainfall is 46mm.
Cascais May sunrise & sunset times
Browse the sunrise and sunset times for Cascais in May 2025. Select a month to view Cascais sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Thursday, 1st May 2025 | 05:40 | 19:30 |
| Friday, 16th May 2025 | 05:25 | 19:44 |
| Saturday, 31st May 2025 | 05:15 | 19:56 |
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