easeweather.com
Units
°C
°F
Cascais
Forecast Today Tomorrow
More destinations
Lisbon PortugalUnited States
Search for a location
Search
Cascais
AlbufeiraAlgarviaAmadoraBragaCacém
Cascais
CoimbraFaroFunchaisFunchalFátimaLagosLisbonMalásiaNazaréPonta DelgadaPortimãoPortoQueluzSetúbalTaviraVila Nova de GaiaÉvora More Locations
Portugal weather

Weather in Cascais for May 2026

Your guide to Cascais weather in May - trends and predictions

    Temperatures

  • In general, the average temperature in Cascais at the beginning of May is 18.6 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 20.3 °C by the end of May.

    • Rain 🌧️

  • With an average of 2 rainy days, Cascais experiences minimal rainfall in May.

    • More

  • Is May a good time to visit Cascais? check out the best time to travel to Cascais page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
29
Dry days
Average rainy days
2
Rainy days
Average snowy days
0
Snow days
Average temperatures
19°/15°
Temperatures
Average wind speed
27 km/h
Avg max wind
Average humidity
73 %
Avg humidity

Cascais Weather May

Move between months or click on a day
April
June
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
19°
2
Overcast
19°
3
Patchy rain possible
18°
4
Patchy rain possible
18°
5
Cloudy
19°
6
Patchy rain possible
18°
7
Partly cloudy
19°
8
Sunny
21°
9
Partly cloudy
20°
10
Partly cloudy
19°
11
Overcast
19°
12
Partly cloudy
18°
13
Sunny
19°
14
Patchy rain possible
18°
15
Partly cloudy
18°
16
Sunny
19°
17
Sunny
21°
18
Patchy rain possible
20°
19
Patchy rain possible
19°
20
Overcast
19°
21
Moderate rain at times
19°
22
Moderate rain at times
19°
23
Moderate rain at times
20°
24
Sunny
20°
25
Sunny
20°
26
Sunny
19°
27
Sunny
19°
28
Sunny
20°
29
Sunny
21°
30
Sunny
21°
31
Sunny
22°

Temperatures trend during May in Cascais

See the weather trend as well as the moving average line

May weather in Cascais day by day

Click on a date for more information
April June
Date Weather Temperatures Rain UV More
1 May Patchy rain possible
Patchy rain possible
 19° /12° 1 mm 5
2 May Overcast
Overcast
 19° /13° 5.1 mm 4
3 May Patchy rain possible
Patchy rain possible
 18° /14° 3.1 mm 5
4 May Patchy rain possible
Patchy rain possible
 18° /14° 2.1 mm 4
5 May Cloudy
Cloudy
 19° /14° 1.2 mm 4
6 May Patchy rain possible
Patchy rain possible
 18° /13° 0.2 mm 5
7 May Partly cloudy
Partly cloudy
 19° /13° 0 mm 5
8 May Sunny
Sunny
 21° /14° 0.1 mm 5
9 May Partly cloudy
Partly cloudy
 20° /15° 0 mm 6
10 May Partly cloudy
Partly cloudy
 19° /15° 0.4 mm 5
11 May Overcast
Overcast
 19° /14° 0 mm 5
12 May Partly cloudy
Partly cloudy
 18° /14° 0 mm 5
13 May Sunny
Sunny
 19° /14° 0.3 mm 5
14 May Patchy rain possible
Patchy rain possible
 18° /14° 0.2 mm 5
15 May Partly cloudy
Partly cloudy
 18° /13° 0.2 mm 5
16 May Sunny
Sunny
 19° /14° 0.4 mm 5
17 May Sunny
Sunny
 21° /15° 0.2 mm 5
18 May Patchy rain possible
Patchy rain possible
 20° /14° 0.2 mm 5
19 May Patchy rain possible
Patchy rain possible
 19° /14° 0.4 mm 5
20 May Overcast
Overcast
 19° /14° 0.1 mm 5
21 May Moderate rain at times
Moderate rain at times
 19° /15° 0.4 mm 5
22 May Moderate rain at times
Moderate rain at times
 19° /15° 0.7 mm 4
23 May Moderate rain at times
Moderate rain at times
 20° /15° 0.3 mm 5
24 May Sunny
Sunny
 20° /15° 0.5 mm 5
25 May Sunny
Sunny
 20° /14° 0 mm 5
26 May Sunny
Sunny
 19° /15° 0 mm 5
27 May Sunny
Sunny
 19° /15° 0.1 mm 5
28 May Sunny
Sunny
 20° /15° 0 mm 5
29 May Sunny
Sunny
 21° /15° 0 mm 6
30 May Sunny
Sunny
 21° /16° 0 mm 5
31 May Sunny
Sunny
 22° /15° 0 mm 6
Next
Important Notice
Our weather forecast for Cascais in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Cascais forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Cascais in May - FAQ

What are the expected maximum and minimum temperatures in Cascais during May?
During May, expect a variety of temperatures with highs around 19° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Cascais during May?
Rainfall in Cascais during May is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 2 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Cascais during May?
The average wind speed in Cascais during May is 27 km/h, suggesting breezy to windy conditions, depending on your activities.

Cascais water temperatures in May

The average water temperature of the Atlantic Ocean near Cascais in May is 15.9 °C. Temperatures remain fairly consistent throughout the month.

What is the water temperature in Cascais in May?
The average water temperature in Cascais in May is 15.9 °C.
Can you swim in Cascais in May?
Brisk: quick dips and active swimming are fine, but pack a 2–3 mm spring suit if you plan longer sessions or early-morning outings.

What to pack to Cascais in May?

As you prepare for your trip to Cascais in May, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Cascais, during May, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Layered Clothing: Light sweaters, long-sleeve shirts, light jackets, and comfortable pants

May rainfall patterns in Cascais

Explore the daily rainfall trends and prepare for Cascaiss May weather 💧

UV exposure in Cascais during May

Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️

Quick links

More Cascais weather pages
You are here
Location coordinates Where is Cascais?

Get accurate weather forecasts for Cascais, located at latitude 38.697 and longitude -9.421. Stay updated with localized weather information tailored for Cascais.

Found a mistake?
We appreciate your attention to details. Tell us here.