The best times to visit Swansea for ideal weather are

May 28th to October 14th

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

 

 


Other Swansea Travel Info

Weather in Swansea

Temperature

Average temperatures in Swansea 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 28th 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 Swansea, the hottest months are July, August, and then September. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 68.2°F (20.1°C) with temperatures rarely dropping below 58.2°F (14.6°C) at night.

Swansea Temperatures (Fahrenheit)

Key
High
Average
Low

Swansea 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.

Swansea Perceived Temperature (F)

Key
High
Average
Low

Swansea Perceived Temperature (C)

Key
High
Average
Low

 

Average Swansea 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 46.5 43.3 39.9
Feb 46.7 43 39.7
Mar 49.9 45.1 41.1
Apr 55.1 49.5 44.9
May 58.7 53.5 49.1
Jun 63.8 58.4 53.8
Jul 66.4 61.4 57.2
Aug 65.9 61.1 57.1
Sep 63.8 58.8 54.4
Oct 59.1 55 51
Nov 52.9 49.3 45.5
Dec 48.2 44.8 41.1

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 8.1 6.3 4.4
Feb 8.2 6.1 4.3
Mar 9.9 7.3 5.1
Apr 12.8 9.7 7.2
May 14.8 11.9 9.5
Jun 17.7 14.7 12.1
Jul 19.1 16.3 14
Aug 18.8 16.2 13.9
Sep 17.7 14.9 12.4
Oct 15.1 12.8 10.6
Nov 11.6 9.6 7.5
Dec 9 7.1 5.1

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Swansea are September, April, and then March. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid April. For example, on the week of April 16th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in early November with an average of 4 days of significant precipitation the week of November 5th.

When can you find snow in Swansea? 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 Swansea.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Swansea (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 41% 0 4.3
Feb 31% 0 2.9
Mar 22% 0 2.4
Apr 20% 0 1.6
May 26% 0 2.9
Jun 22% 0 2.3
Jul 31% 0 3.9
Aug 31% 0 4.3
Sep 19% 0 2.3
Oct 33% 0 3.8
Nov 46% 0 4.9
Dec 38% 0 4.4

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 41 0 10.9
Feb 31 0 7.4
Mar 22 0 6.1
Apr 20 0 4.1
May 26 0 7.4
Jun 22 0 5.8
Jul 31 0 9.9
Aug 31 0 10.9
Sep 19 0 5.8
Oct 33 0 9.7
Nov 46 0 12.4
Dec 38 0 11.2

 

Humidity and Wind

Swansea has some extremely humid months, and high humidity throughout the year. The least humid month is April (73.1% relative humidity), and the most humid month is January (81.4%).

Wind in Swansea is usually stronger than many places. The windiest month is December, followed by January and November. December’s average wind speed of around 15.6 knots (18 MPH or 28.9 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 27.2 knots, which is considered a strong breeze.

Relative Humidity (%)

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

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 15.3 Significant breeze 24.5 Very strong breeze
Feb 13.4 Significant breeze 21.3 Strong breeze
Mar 11.6 Significant breeze 19.8 Very strong breeze
Apr 11.5 Significant breeze 19.3 Strong breeze
May 13.1 Significant breeze 21.2 Very strong breeze
Jun 11.8 Significant breeze 19 Strong breeze
Jul 12.4 Significant breeze 19.9 Very strong breeze
Aug 13 Significant breeze 20.5 Strong breeze
Sep 12.2 Significant breeze 19.5 Very strong breeze
Oct 14.1 Significant breeze 22 Very strong breeze
Nov 14.9 Significant breeze 23.8 Very strong breeze
Dec 15.6 Significant breeze 24.9 Very strong breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 81.4%
Feb 79.1%
Mar 74.7%
Apr 73.1%
May 74.6%
Jun 75.4%
Jul 76.5%
Aug 77.1%
Sep 75.5%
Oct 77.9%
Nov 78.9%
Dec 80.4%

 

Is it Safe to Travel to Swansea?

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 Swansea, the United Kingdom is June, followed by May and July. 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 Swansea in November. 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 very reliable. Displayed data is calculated relative to the peak, so a score of 56.1 in November means 56.1% of the tourists vs. June.

 

 

Overall Swansea Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 61.9°F (16.6°C) and 48°F (8.9°C) with warmer temperatures in the later months. Rain is somewhat common with 6 to 8 days of significant precipitation per month. Spring is the second 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 comfortably cool weather with high temperatures that are comfortable. These months see moderate precipitation with 7 to 10 days of precipitation per month. June – August is the busiest season for tourism in Swansea, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 65.5°F (18.6°C) and 49°F (9.4°C), which will feel chilly given the humidity and wind. It rains or snows a good amount: 6 to 14 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 Swansea to be enjoyable for warm weather travelers. The average high during this season is between 49.6°F (9.8°C) and 44.7°F (7.1°C). On average, it rains or snows a great amount: 9 to 13 times per month. These times of year are fairly slow with tourists.

 

Best Times to Travelthe United Kingdom › Swansea, the United Kingdom