Click on a day for an hourly weather forecast
The temperatures in Koksijde in September are usually low and can range between 14°C and 19°C.
You can expect about 3 to 8 days of rain in Koksijde 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 Koksijde in September 2026.
If you’re planning to visit Koksijde in the near future, we highly recommend that you review the 14 day weather forecast for Koksijde before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 4° | 11 | 17 | 4 | 101 mm | Awful | Koksijde in January |
| February | 7° / 4° | 8 | 17 | 4 | 81 mm | Awful | Koksijde in February |
| March | 10° / 5° | 7 | 23 | 1 | 75 mm | Bad | Koksijde in March |
| April | 13° / 7° | 4 | 25 | 1 | 50 mm | Ok | Koksijde in April |
| May | 15° / 10° | 5 | 26 | 0 | 69 mm | Good | Koksijde in May |
| June | 18° / 12° | 5 | 25 | 0 | 84 mm | Good | Koksijde in June |
| July | 20° / 15° | 6 | 25 | 0 | 96 mm | Good | Koksijde in July |
| August | 21° / 15° | 6 | 25 | 0 | 104 mm | Good | Koksijde in August |
| September | 19° / 14° | 5 | 25 | 0 | 73 mm | Good | Koksijde in September |
| October | 15° / 11° | 7 | 24 | 0 | 115 mm | Ok | Koksijde in October |
| November | 11° / 8° | 8 | 21 | 1 | 117 mm | Bad | Koksijde in November |
| December | 8° / 5° | 8 | 20 | 2 | 116 mm | Awful | Koksijde in December |