Click on a day for an hourly weather forecast
The temperatures in Swanage in September are usually low and can range between 13°C and 18°C.
You can expect about 3 to 8 days of rain in Swanage 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 Swanage in September 2025.
If you’re planning to visit Swanage in the near future, we highly recommend that you review the 14 day weather forecast for Swanage before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 8° / 4° | 7 | 22 | 2 | 79 mm | Awful | Swanage in January |
| February | 8° / 4° | 7 | 18 | 3 | 70 mm | Awful | Swanage in February |
| March | 10° / 5° | 5 | 26 | 0 | 53 mm | Ok | Swanage in March |
| April | 12° / 6° | 4 | 26 | 0 | 46 mm | Ok | Swanage in April |
| May | 15° / 9° | 5 | 27 | 0 | 51 mm | Good | Swanage in May |
| June | 17° / 12° | 4 | 26 | 0 | 59 mm | Good | Swanage in June |
| July | 20° / 14° | 3 | 28 | 0 | 54 mm | Good | Swanage in July |
| August | 19° / 14° | 5 | 26 | 0 | 69 mm | Good | Swanage in August |
| September | 18° / 13° | 4 | 26 | 0 | 51 mm | Good | Swanage in September |
| October | 15° / 11° | 7 | 24 | 0 | 108 mm | Ok | Swanage in October |
| November | 11° / 8° | 6 | 24 | 0 | 101 mm | Ok | Swanage in November |
| December | 9° / 6° | 7 | 23 | 1 | 88 mm | Bad | Swanage in December |