Click on a day for an hourly weather forecast
The temperatures in Tenby in September are usually low and can range between 14°C and 16°C.
You can expect about 3 to 8 days of rain in Tenby during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
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 | 9° / 6° | 11 | 18 | 1 | 166 mm | Bad | Tenby in January |
| February | 8° / 6° | 10 | 17 | 1 | 121 mm | Bad | Tenby in February |
| March | 9° / 6° | 7 | 23 | 1 | 94 mm | Bad | Tenby in March |
| April | 11° / 8° | 6 | 23 | 0 | 80 mm | Ok | Tenby in April |
| May | 13° / 10° | 7 | 25 | 0 | 86 mm | Bad | Tenby in May |
| June | 16° / 12° | 7 | 23 | 0 | 105 mm | Ok | Tenby in June |
| July | 17° / 15° | 6 | 25 | 0 | 106 mm | Good | Tenby in July |
| August | 17° / 15° | 9 | 22 | 0 | 148 mm | Ok | Tenby in August |
| September | 16° / 14° | 7 | 23 | 0 | 123 mm | Ok | Tenby in September |
| October | 14° / 12° | 11 | 20 | 0 | 192 mm | Ok | Tenby in October |
| November | 12° / 9° | 12 | 18 | 0 | 202 mm | Bad | Tenby in November |
| December | 10° / 8° | 12 | 18 | 1 | 186 mm | Bad | Tenby in December |