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Wales Weather September
To help you choose the best time to travel, you can find climate data below on the weather in Wales in September.
| Wales Weather September: | Cardiff | Swansea | |
 | average daily high | +18.8°C | +17.8°C |
 | average daily low | +10.5°C | +12.4°C |
 | sea temperature | +16.5°C | +16.5°C |
 | daylight hours | 13.2h | 13.2h |
 | sunny/overcast hours | 5.0/8.2h | |
 | average monthly precipitation | 94 mm | 77 mm |
Temperature in Wales
The average daily maximum in September is +18.8 — +17.8°C, and the minimum +10.5 — +12.4°C.
Best places in Wales:
Most Popular Destinations in the World
Sea temperature
The average monthly temperature in the Bristol Channel on the beaches of Cardiff in September is +16.5 degrees and on the beaches of Swansea +16.5 degrees.
The water is considered very cool, but some hardy people might bathe in it for 10-15 minutes.
Precipitation
The normal amount of precipitation for September is from 77 to 94 mm, which may cause a change of plans on certain days.