Click on a day for an hourly weather forecast
The temperatures in Tenby in September are comfortable with low of 12°C and and high up to 26°C.
There is little to no rain in Tenby during September, so it’s a lot easier to explore the city. Just remember to dress in warm layers, as it can still get pretty chilly.
Our weather forecast can give you a great sense of what weather to expect in Tenby in September 2025.
If you’re planning to visit Tenby in the near future, we highly recommend that you review the 14 day weather forecast for Tenby before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 31° / 20° | 6 | 25 | 0 | 136 mm | Good | Tenby in January |
| February | 30° / 20° | 5 | 23 | 0 | 100 mm | Good | Tenby in February |
| March | 29° / 18° | 3 | 28 | 0 | 75 mm | Good | Tenby in March |
| April | 25° / 15° | 3 | 27 | 0 | 46 mm | Perfect | Tenby in April |
| May | 22° / 11° | 1 | 30 | 0 | 10 mm | Good | Tenby in May |
| June | 17° / 7° | 1 | 29 | 0 | 17 mm | Good | Tenby in June |
| July | 17° / 6° | 0 | 31 | 0 | 4 mm | Good | Tenby in July |
| August | 21° / 8° | 0 | 31 | 0 | 7 mm | Good | Tenby in August |
| September | 26° / 12° | 0 | 30 | 0 | 10 mm | Perfect | Tenby in September |
| October | 28° / 15° | 2 | 29 | 0 | 34 mm | Perfect | Tenby in October |
| November | 30° / 17° | 3 | 27 | 0 | 57 mm | Good | Tenby in November |
| December | 31° / 19° | 4 | 27 | 0 | 68 mm | Good | Tenby in December |