The best times to visit Sintra 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.
Sintra Travel Guide
Weather in Sintra
Average temperatures in Sintra 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 Sintra, 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.
Sintra Temperatures (Fahrenheit)
Sintra Temperatures (Celsius)
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.
Sintra Perceived Temperature (F)
Sintra Perceived Temperature (C)
Average Sintra 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.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Sintra 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 Sintra? 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.
The graph below shows the % chance of rainy and snowy days in Sintra.
Snow on the Ground
The graph below shows the average snow on the ground in Sintra (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Sintra 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 Sintra 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 Sintra.
The graph below shows wind speed (max and average) in knots.
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|
Is it Safe to Travel to Sintra?
Our best data indicates this area is generally safe. As of Mar 17, 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 Oct 15, 2018.
The Busiest and Least Crowded Months
The busiest month for tourism in Sintra, 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 Sintra 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
Overall Sintra 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 Sintra, 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 Sintra 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.