Swansea in september: average Weather, Temperature and Climate
Weather in Swansea in september 2025
The weather in Swansea in september comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather
Weather at 6am
58°F
Partly Cloudy
26% of time
23%
21%
17%
Weather at 12pm
63°F
Clear/Sunny
26% of time
25%
24%
17%
Weather at 6pm
61°F
Clear/Sunny
31% of time
27%
20%
16%
Weather at 3am
58°F
26%
25%
24%
13%
Evolution of daily average temperature and precipitation in Swansea in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Swansea in september.
The climate of Swansea in september is good
the weather in Swansea in september is wet (with 4.1in of rainfall over 7 days). This is better than the previous month since in august it receives an average of 5.2in of rainfall over 9 days.
The climate is quite cold in this city september, but it is tolerable when dressing warm. Temperatures are up to 63°F. In the morning the temperature drops to 56°F. Thus, the mean temperature average in september in Swansea is 59°F. These temperatures are far removed from those records observed in Swansea in the month of september with a maximum record of 77°F in 2021 and a minimum record of 43°F in 2012. You can hope to have about 10 days with temperatures over 65°F, or 33% of the month.
On this month of september, day length in Swansea is generally 12:39. Sunrise is at 05:51 and sets at 18:30.
With a good weather, the month of september is advisable to go in this city.
Seasonal average climate and temperature of Swansea in september
Check below seasonal norms These statistics are set from the weather statements of the last years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 59°F | ||||
| Highest temperature | 63°F | ||||
| Lowest temperature | 56°F | ||||
| Highest record temperature | 77°F (2021) | ||||
| Lowest record temperature | 43°F (2012) | ||||
| Number of days at +65°F | 10 day(s) (33%) | ||||
| Sea temperature | |||||
| Average sea temperature | 62°F | ||||
| Lowest sea temperature | 61°F | ||||
| Highest sea temperature | 64°F | ||||
| Wind | |||||
| Wind speed | 24km/h | ||||
| Wind temperature | 54°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 4.1in | ||||
| Number of days with rainfall | 7 day(s) (23%) | ||||
| Record daily rainfall | 1.5in (2019) | ||||
| Other climate data | |||||
| Humidity | 88% | ||||
| Visibility | 9.09km | ||||
| Cloud cover | 49% | ||||
| UV index | 5 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:51 | ||||
| Time of sunset | 18:30 | ||||
| Length of day | 12:39 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Swansea in september 2024:
59°F to 67°F
61°F to 65°F
56°F to 61°F
52°F to 58°F
54°F to 61°F
63°F to 67°F
58°F to 65°F
61°F to 63°F
54°F to 59°F
58°F to 59°F
52°F to 56°F
49°F to 54°F
47°F to 56°F
54°F to 59°F
58°F to 61°F
54°F to 63°F
54°F to 65°F
54°F to 68°F
58°F to 68°F
58°F to 67°F
56°F to 67°F
59°F to 65°F
59°F to 61°F
54°F to 56°F
54°F to 56°F
54°F to 56°F
49°F to 56°F
50°F to 56°F
52°F to 56°F
56°F to 59°F
Map: other cities in Wales in september
Cities near Swansea:
| Llanelli in september | good weather |
| Porthcawl in september | good weather |
| Carmarthen in september | good weather |
| Merthyr Tydfil in september | good weather |
| Barry in september | good weather |
| Brecon Beacons (National Park) in september | tolerable weather |
| Cardiff in september | good weather |
| Pembrokeshire in september | good weather |
| Haverfordwest in september | good weather |
| Llandrindod Wells in september | tolerable weather |
| Fishguard in september | good weather |
| Aberystwyth in september | good weather |
Click over cities on the map for information about the weather in september.
Swansea
perfect weather
good
tolerable
bad
very bad
Weather data for Swansea in september:
Weather data for Swansea for september are derived from an average of the weather forecast since 2009 in Swansea. There is a margin of error and these forecasts are to be considered as general information only. The weather in Swansea can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Swansea.