Cascais weather in July 2026

Q: How hot is it in Cascais in July?

Daytime temperatures usually reach 28°C in Cascais in July with low heat and humidity, falling to 18°C at night.

Q: How sunny is it in Cascais in July?

There are normally 11 hours of bright sunshine each day in Cascais in July - that's 78% of daylight hours.

Q: How warm is the sea around Cascais in July?

The average sea temperature around Cascais in July is 18°C.

Q: Does it ever rain in Cascais in July?

There are usually 2 days with some rain in Cascais in July and the average monthly rainfall is 4mm.

Expect daytime maximum temperatures of 26°C in Cascais, Portugal in July based on long-term weather averages. There are 11 hours of sunshine per day on average.

26
26°C max day temperature
11
11 hours of sunshine per day
2
2 days with some rainfall
17
17°C min night temperature
15
15 hours of daylight per day
0
No heat & humidity
7
7 mm of monthly rainfall
9
9 (Very High) UV index
18
18°C sea temperature

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The July 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)