Click on a day for an hourly weather forecast
The temperatures in Ostend in September are usually low and can range between 13°C and 19°C.
You can expect about 3 to 8 days of rain in Ostend 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 Ostend in September 2025.
If you’re planning to visit Ostend in the near future, we highly recommend that you review the 14 day weather forecast for Ostend before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 3° | 9 | 18 | 4 | 97 mm | Awful | Ostend in January |
| February | 7° / 3° | 8 | 17 | 4 | 75 mm | Awful | Ostend in February |
| March | 10° / 5° | 7 | 23 | 1 | 73 mm | Bad | Ostend in March |
| April | 13° / 7° | 4 | 25 | 1 | 52 mm | Ok | Ostend in April |
| May | 16° / 9° | 6 | 25 | 0 | 75 mm | Good | Ostend in May |
| June | 19° / 12° | 5 | 25 | 0 | 85 mm | Good | Ostend in June |
| July | 21° / 14° | 6 | 25 | 0 | 101 mm | Good | Ostend in July |
| August | 22° / 15° | 5 | 26 | 0 | 97 mm | Good | Ostend in August |
| September | 19° / 13° | 4 | 26 | 0 | 68 mm | Good | Ostend in September |
| October | 15° / 10° | 6 | 25 | 0 | 102 mm | Good | Ostend in October |
| November | 11° / 7° | 8 | 22 | 1 | 104 mm | Bad | Ostend in November |
| December | 8° / 5° | 8 | 20 | 3 | 102 mm | Awful | Ostend in December |