Cascais weather live forecast

Today's maximum temperature in Cascais is expected to be 21°C. Select a day from the live weather forecast for Cascais, Portugal for more weather parameters.

Tuesday
19th May
21

12

8

UV8
Wednesday
20th May
27

14

14

UV9
Thursday
21st May
29

16

10

UV6
Friday
22nd May
27

18

3

UV7
Saturday
23rd May
23

16

9

UV9

5-day weather forecast updated at 04:02 on Tuesday 19th May 2026 GMT

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The 5-day weather forecast for Portugal (Cascais) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Cascais weather forecast by day

Below are the detailed weather forecasts for Cascais for the next 5 days.

Cascais weather for Tuesday 19th May 2026

Expect broken clouds in Cascais, Portugal with a maximum temperature of 21°C, maximum UV of 8 (Very High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the north-west.

21
°C maximum temperature
12
°C minimum temperature
broken clouds
8
hours of sunshine
UV8
UV index (Very High)
0
mm of rainfall expected
21
°C wind chill
21
kph wind from NW

Cascais weather for Wednesday 20th May 2026

Expect clear skies in Cascais, Portugal with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 9 (Very High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the north.

27
°C maximum temperature
14
°C minimum temperature
clear skies
14
hours of sunshine
UV9
UV index (Very High)
0
mm of rainfall expected
L
low heat & humidity
18
kph wind from N

Cascais weather for Thursday 21st May 2026

Expect scattered clouds in Cascais, Portugal with a maximum temperature of 29°C, low levels of heat & humidity, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north-west.

29
°C maximum temperature
16
°C minimum temperature
scattered clouds
10
hours of sunshine
UV6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
16
kph wind from NW

Cascais weather for Friday 22nd May 2026

Expect broken clouds in Cascais, Portugal with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 7 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the north-west.

27
°C maximum temperature
18
°C minimum temperature
broken clouds
3
hours of sunshine
UV7
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
20
kph wind from NW

Cascais weather for Saturday 23rd May 2026

Expect broken clouds in Cascais, Portugal with a maximum temperature of 23°C, maximum UV of 9 (Very High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 31 kph from the north.