Swansea weather in September 2020

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  • 17°C maximum daytime temperature in September in Swansea17
    17°C max day temperature
  • 5 hours of sunshine per day
  • 16 days with some rainfall in September in Swansea16
    16 days with some rainfall
  • 11°C minimum night-time temperature in September in Swansea11
    11°C min night temperature
  • 13 hours of daylight per day in September in Swansea13
    13 hours of daylight per day
  • No heat & humidity in September in Swansea0
    No heat & humidity
  • 111 mm monthly rainfall in September in Swansea111
    111 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Swansea4
    4 (Moderate) UV index
  • 17°C sea temperature in September in Swansea17
    17°C sea temperature
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The September weather guide for Swansea, Wales shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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Looking for camping holidays in Swansea City, Wales? Browse hostels and campsites for camping, glamping, yurts, cabins, tree houses, youth hostels and caravan parks.

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How warm is it in Swansea in September?

Daytime temperatures usually reach 17°C in Swansea in September, falling to 11°C at night.

How sunny is it in Swansea in September?

There are normally 5 hours of bright sunshine each day in Swansea in September - that's 36% of daylight hours.

How warm is the sea around Swansea in September?

The average sea temperature around Swansea in September is 17°C.

Does it rain in Swansea in September?

There are usually 16 days with some rain in Swansea in September and the average monthly rainfall is 111mm.

Swansea sunrise & sunset times for September 2020

Browse the sunrise & sunset times for Swansea in September 2020. Select a month to view Swansea sunrise & sunset times for the next twelve months.


Date Sunrise times Sunset times
Tuesday, 1st September 2020 06:29 20:01
Tuesday, 15th September 2020 06:51 19:29
Wednesday, 30th September 2020 07:15 18:55
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Metric (°C / mm)  |  Imperial (°F / inches)

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Where is hot in Wales in September for 2020/2021?

Below are average maximum temperatures at popular destinations in Wales in September. Select a destination to see more weather parameters.

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