Click on a day for an hourly weather forecast
The temperatures in Donostia San Sebastian in August are comfortable with low of 17°C and and high up to 23°C.
You can expect about 3 to 8 days of rain in Donostia San Sebastian during the month of August. 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 Donostia San Sebastian in August 2025.
If you’re planning to visit Donostia San Sebastian in the near future, we highly recommend that you review the 14 day weather forecast for Donostia San Sebastian before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 10° / 6° | 11 | 20 | 1 | 213 mm | Bad | Donostia San Sebastian in January |
| February | 10° / 6° | 10 | 17 | 2 | 179 mm | Awful | Donostia San Sebastian in February |
| March | 12° / 8° | 8 | 22 | 0 | 135 mm | Bad | Donostia San Sebastian in March |
| April | 14° / 9° | 8 | 22 | 0 | 127 mm | Ok | Donostia San Sebastian in April |
| May | 16° / 11° | 9 | 22 | 0 | 147 mm | Ok | Donostia San Sebastian in May |
| June | 20° / 15° | 7 | 23 | 0 | 147 mm | Ok | Donostia San Sebastian in June |
| July | 22° / 17° | 5 | 26 | 0 | 90 mm | Good | Donostia San Sebastian in July |
| August | 23° / 17° | 5 | 26 | 0 | 94 mm | Perfect | Donostia San Sebastian in August |
| September | 21° / 16° | 5 | 25 | 0 | 97 mm | Good | Donostia San Sebastian in September |
| October | 18° / 13° | 7 | 24 | 0 | 126 mm | Ok | Donostia San Sebastian in October |
| November | 13° / 9° | 11 | 19 | 0 | 245 mm | Bad | Donostia San Sebastian in November |
| December | 11° / 7° | 9 | 21 | 1 | 161 mm | Bad | Donostia San Sebastian in December |