The best times to visit Cascais for ideal weather are

April 16th to October 28th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

 

 


Other Cascais Travel Info

Weather in Cascais

Temperature

Average temperatures in Cascais vary somewhat. Considering humidity, temperatures feel nice most of the year, excluding some cold weeks in the winter, with a low chance of precipitation most of the year. The area is more temperate than most — in the 62nd percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Cascais, the hottest months are August, July, and then September. See average monthly temperatures below. The warmest time of year is generally early to mid August where highs are regularly around 79.4°F (26.3°C) with temperatures rarely dropping below 63.1°F (17.3°C) at night.

Cascais Temperatures (Fahrenheit)

Key
High
Average
Low

Cascais Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Cascais Perceived Temperature (F)

Key
High
Average
Low

Cascais Perceived Temperature (C)

Key
High
Average
Low

 

Average Cascais Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 58.1 52.2 44.9
Feb 58.8 52.7 44.7
Mar 62.6 55.9 47
Apr 65.3 58.8 50.4
May 68.5 62.4 53.8
Jun 72.9 67.3 58.8
Jul 76.1 70.1 61.6
Aug 77.5 71 62.1
Sep 77 70 60.7
Oct 72.4 65.4 56
Nov 62.4 56.5 48
Dec 58.7 53.5 46.2

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 14.5 11.2 7.2
Feb 14.9 11.5 7.1
Mar 17 13.3 8.3
Apr 18.5 14.9 10.2
May 20.3 16.9 12.1
Jun 22.7 19.6 14.9
Jul 24.5 21.2 16.4
Aug 25.3 21.7 16.7
Sep 25 21.1 15.9
Oct 22.4 18.6 13.3
Nov 16.9 13.6 8.9
Dec 14.8 11.9 7.9

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Cascais are August, July, and then June. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early July. For example, on the week of July 2nd there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early February with an average of 2 days of significant precipitation the week of February 5th.

When can you find snow in Cascais? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Cascais.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Cascais (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 21% 0 2.9
Feb 28% 0 3.7
Mar 13% 0 1.5
Apr 16% 0 2.4
May 11% 0 1.5
Jun 6% 0 0.7
Jul 1% 0 0.1
Aug 1% 0 0.1
Sep 6% 0 0.6
Oct 14% 0 1.9
Nov 20% 0 2.9
Dec 20% 0 3.8

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 21 0 7.4
Feb 28 0 9.4
Mar 13 0 3.8
Apr 16 0 6.1
May 11 0 3.8
Jun 6 0 1.8
Jul 1 0 0.3
Aug 1 0 0.3
Sep 6 0 1.5
Oct 14 0 4.8
Nov 20 0 7.4
Dec 20 0 9.7

 

Humidity and Wind

Cascais has some very humid months, and above average humidity throughout the year. The least humid month is August (61.1% relative humidity), and the most humid month is January (74.9%).

Wind in Cascais is usually moderate. The windiest month is July, followed by August and June. July’s average wind speed of around 10.1 knots (11.6 MPH or 18.6 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late March where average top sustained speeds reach 15.8 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Cascais.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 6.7 Light breeze 11.9 Significant breeze
Feb 7.8 Gentle breeze 13.7 Significant breeze
Mar 8.3 Gentle breeze 14.2 Significant breeze
Apr 8.3 Gentle breeze 14 Significant breeze
May 8.8 Gentle breeze 13.6 Significant breeze
Jun 9.5 Gentle breeze 14 Significant breeze
Jul 10.1 Gentle breeze 14.2 Significant breeze
Aug 9.8 Gentle breeze 14.1 Significant breeze
Sep 7.9 Gentle breeze 13.1 Significant breeze
Oct 7.2 Gentle breeze 12.5 Significant breeze
Nov 7.2 Gentle breeze 12.7 Significant breeze
Dec 7.7 Gentle breeze 12.6 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 74.9%
Feb 71.5%
Mar 65%
Apr 67.1%
May 66.4%
Jun 64.4%
Jul 61.9%
Aug 61.1%
Sep 61.7%
Oct 65.6%
Nov 68.2%
Dec 72.5%

 

Is it Safe to Travel to Cascais?

Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for Portugal; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Aug 22, 2019.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Cascais, Portugal is April, followed by January and May. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Cascais in October. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is slightly extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 50.9 in October means 50.9% of the tourists vs. April.

 

 

Overall Cascais Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderate. Highs range from 72.1°F (22.3°C) and 59.5°F (15.3°C) with warmer temperatures in the later months. Rain is somewhat common with 3 to 5 days of significant precipitation per month. Spring is the busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the least precipitation with 0 to 2 days of precipitation per month. June – August is fairly slow season for tourism in Cascais, so lodging and other accommodations may cost slightly less.

Fall (September through November)

Fall daily highs range from 79.3°F (26.3°C) and 57.1°F (13.9°C), which will feel comfortable given the humidity and wind. It rains or snows a significant amount: 2 to 6 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is too cold this time of year in Cascais to be enjoyable for warm weather travelers. The average high during this season is between 61.1°F (16.2°C) and 56.8°F (13.8°C). On average, it rains or snows a fair amount: 6 to 8 times per month. These times of year are the second busiest with tourists.

 

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