Swansea monthly weather averages

  • Average daytime temperature

    The bar chart below shows the average monthly peak daytime temperatures at Swansea

    Swansea average temperature chart
    Average monthly temperatures in Swansea (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 7.4 7.2 9.1 11.6 14.7 17.6 19.5 19.3 17.2 14.3 10.4 8.4
    °F 45.3 44.9 48.4 53 58.5 63.7 67.1 66.7 63 57.8 50.8 47.2

    Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

  • Average rainfall & rainy days

    The graph below shows the average rainfall and number of rainy days per month.

    Average monthly rainfall in Swansea (mm and inches)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    mm 133 89 96 69 77 78 75 103 111 130 138 140
    inches 5.2 3.5 3.8 2.7 3 3.1 3 4 4.4 5.1 5.4 5.5
    Rainy days 20 15 18 14 15 15 13 16 16 19 20 20
  • Average daily sunshine

    The bar chart below shows the average daily sunshine hours in Swansea

    Average daily sunshine Swansea
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Hrs sunshine 2 2.9 4 6 7 7.2 6.6 6.4 5 3.5 2.7 1.8
  • Day / night temperatures

    The graph below shows the daily range of temperatures for each month.

    Maximum and minimum daily temperatures in Swansea (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Min °C 2.9 2.5 3.6 5.2 8.1 11.1 13 13 11.3 9 5.5 3.9
    Max °C 7.5 7.3 9.3 11.8 14.9 17.8 19.7 19.5 17.4 14.5 10.6 8.6
    Min °F 37.2 36.5 38.4 41.4 46.6 51.9 55.3 55.3 52.3 48.1 41.8 38.9
    Max °F 41.4 40.8 43.5 47.3 52.7 57.9 61.3 61.2 57.7 53.1 46.4 43.2
  • Sea temperature

    The graph below shows the average sea temperature.

    Average sea temperature around Swansea in degrees centigrade and fahrenheit
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 10.2 9.3 9.2 9.9 11.2 13.1 15.1 16.2 16.1 14.9 13.3 11.6
    °F 50.3 48.8 48.6 49.8 52.2 55.6 59.1 61.2 60.9 58.8 55.9 52.9
  • Wind speed

    The graph below shows the average wind speed.

    Average wind speed in Swansea (mph and kmh)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    km/h 21 21 21 19 18 17 16 17 18 19 21 22
    mph 13 13 13 12 11 10 10 10 11 12 13 14

    A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

  • Relative humidity

    The graph below shows the average relative humidity.

    Average relative humidity in Swansea
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    90% 88% 85% 82% 81% 83% 84% 85% 86% 88% 88% 91%

Other monthly averages

Swansea weather stats

Swansea weather statistics
Hottest month: July 19.5°C 67.1°F
Driest month: April 69mm 2.7ins
Sunniest month: May 7hrs
Coldest month: February 7.2°C 45°F
Wettest month: December 140mm 5.5ins
Warmest sea: August 16.2°C 61.2°F
Map showing location of Swansea (51.62079, -3.94323)

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