The best times to visit Portstewart for ideal weather are

June 18th to September 30th

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

 

 


Other Portstewart Travel Info

Weather in Portstewart

Temperature

Average temperatures in Portstewart vary somewhat. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 18th 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 Portstewart, the hottest months are July, August, and then September. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 67.7°F (19.8°C) with temperatures rarely dropping below 52.9°F (11.6°C) at night.

Portstewart Temperatures (Fahrenheit)

Key
High
Average
Low

Portstewart 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.

Portstewart Perceived Temperature (F)

Key
High
Average
Low

Portstewart Perceived Temperature (C)

Key
High
Average
Low

 

Average Portstewart 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

MonthAvg. High (°F)Avg. Mean (°F)Avg. Low (°F)
Jan4641.937.1
Feb46.742.137.4
Mar49.543.437.1
Apr53.346.238.9
May57.250.544
Jun61.654.847.9
Jul65.558.551.6
Aug64.857.951.8
Sep6255.649.5
Oct56.851.445.6
Nov5146.340.6
Dec47.943.638.6

Show Celsius

MonthAvg. High (°C)Avg. Mean (°C)Avg. Low (°C)
Jan7.85.52.8
Feb8.25.63
Mar9.76.32.8
Apr11.87.93.8
May1410.36.7
Jun16.412.78.8
Jul18.614.710.9
Aug18.214.411
Sep16.713.19.7
Oct13.810.87.6
Nov10.67.94.8
Dec8.86.43.7

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Portstewart are April, September, and then July. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late May. For example, on the week of May 21st there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in early December with an average of 5 days of significant precipitation the week of December 3rd.

When can you find snow in Portstewart? 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 Portstewart.

Key
Days with precipitation

Snow on the Ground

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

Key
Snow depth

Average Rain and Snow by Month

Show Inches

MonthDaily Chance of RainAverage Snow Depth (in)Total Precipitation (in)
Jan50%04.5
Feb42%03.4
Mar28%02.4
Apr20%01.7
May32%03.1
Jun30%03
Jul24%02.7
Aug35%03
Sep22%01.9
Oct31%03.3
Nov33%03.9
Dec59%05.2

Show Centimeters

MonthDaily Chance of RainAverage Snow Depth (cm)Total Precipitation (cm)
Jan50011.4
Feb4208.6
Mar2806.1
Apr2004.3
May3207.9
Jun3007.6
Jul2406.9
Aug3507.6
Sep2204.8
Oct3108.4
Nov3309.9
Dec59013.2

 

Humidity and Wind

Portstewart has some extremely humid months, and high humidity throughout the year. The least humid month is April (72.7% relative humidity), and the most humid month is December (81.9%).

Wind in Portstewart is usually stronger than many places. The windiest month is December, followed by January and February. December’s average wind speed of around 14.5 knots (16.7 MPH or 26.9 KPH) is considered “a moderate breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late December where average top sustained speeds reach 25 knots, which is considered a strong breeze.

Relative Humidity (%)

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

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.

MonthAvg. WindAvg. Wind FeelSustained High WindHigh Wind Feel
Jan14.2Significant breeze22.3Very strong breeze
Feb12.5Significant breeze19.6Strong breeze
Mar12.4Significant breeze19.5Very strong breeze
Apr10.7Gentle breeze17.1Strong breeze
May11Significant breeze17.4Very strong breeze
Jun9.1Gentle breeze14.7Significant breeze
Jul8.4Gentle breeze14.3Very strong breeze
Aug10.1Gentle breeze16.5Significant breeze
Sep9.9Gentle breeze15.4Very strong breeze
Oct10.7Gentle breeze17Strong breeze
Nov11.7Significant breeze19.2Very strong breeze
Dec14.5Significant breeze22.9Very strong breeze

Show Relative Humidity by Month

MonthAvg. Relative Humidity
Jan80.8%
Feb80.4%
Mar74.5%
Apr72.7%
May75.2%
Jun77.9%
Jul79.3%
Aug78.4%
Sep79%
Oct80.2%
Nov81.6%
Dec81.9%

 

Is it Safe to Travel to Portstewart?

Our best data indicates this area is somewhat safe. As of Oct 07, 2019 there are travel warnings for the United Kingdom; exercise a high degree of caution. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Sep 06, 2019.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Portstewart, the United Kingdom is July, followed by January and August. 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 Portstewart in April. 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 somewhat extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 71.3 in April means 71.3% of the tourists vs. July.

 

 

Overall Portstewart Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 60.6°F (15.9°C) and 48.5°F (9.2°C) with warmer temperatures in the later months. Rain is somewhat common with 6 to 10 days of significant precipitation per month. Spring is the slowest for tourism, which makes it a good time for those looking for deals.

Summer (June through August)

The middle-year months have comfortably cool weather with high temperatures that are brisk. These months see moderate precipitation with 7 to 11 days of precipitation per month. June – August is the busiest season for tourism in Portstewart, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 62.8°F (17.1°C) and 49.1°F (9.5°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 7 to 10 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.

Winter (December through February)

Weather is too cold this time of year in Portstewart to be enjoyable for warm weather travelers. The average high during this season is between 49.4°F (9.7°C) and 43.4°F (6.3°C). On average, it rains or snows a very great amount: 12 to 18 times per month. These times of year are the second busiest with tourists.

 

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