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Wales Monthly Climate Averages
To help you choose the best time to travel, you can find climate data below on the weather in Wales .
| Month | Cardiff | Swansea | ||
| day | night | day | night | |
| January | +8.3°C | +2.3°C | +8°C | +4°C |
| February | +8.6°C | +2.1°C | +7.8°C | +3.6°C |
| March | +11.1°C | +4°C | +9.5°C | +4.8°C |
| April | +13.8°C | +5.2°C | +11.9°C | +6.3°C |
| May | +17.1°C | +8.3°C | +15°C | +9.2°C |
| June | +19.8°C | +11°C | +17.7°C | +11.8°C |
| July | +21.7°C | +13.1°C | +19.6°C | +13.9°C |
| August | +21.5°C | +12.8°C | +19.7°C | +14°C |
| September | +18.8°C | +10.5°C | +17.8°C | +12.4°C |
| October | +14.9°C | +7.7°C | +14.4°C | +9.9°C |
| November | +11.3°C | +4.6°C | +11.1°C | +6.9°C |
| December | +8.7°C | +2.6°C | +8.7°C | +4.7°C |
Temperature in Wales
The table shows that the hottest months in Wales are July and August, during which the average daytime temperature reaches 21.7°C and the nighttime temperature falls to 13.9°C.
The coldest months are January and February, when the daily average temperature falls to 8°C, and drops to + 2.3°C during the night.
Best places in Wales:
Most Popular Destinations in the World
Sea temperature
The highest average monthly temperature in the Bristol Channel on the beaches of Cardiff is in August and September and is 16.5-16.6°C.
The highest average monthly temperature in the Bristol Channel on the beaches of Swansea is in August and September and equals 16.5 16.7°C.
Precipitation
The largest amount of rain falls on average in October and December, up to 134mm, and the least in June and April — up to 67mm.