Wind — 2020
| Month | Wassenaar | Katwijk | Difference |
|---|---|---|---|
| Jan | 28.2 km/h | 24.1 km/h | +4.1 |
| Feb | 37.5 km/h | 32.6 km/h | +4.9 |
| Mar | 28.1 km/h | 24 km/h | +4.1 |
| Apr | 19.4 km/h | 16.8 km/h | +2.6 |
| May | 20.4 km/h | 17.6 km/h | +2.8 |
| Jun | 20.3 km/h | 17.5 km/h | +2.8 |
| Jul | 21.3 km/h | 18.2 km/h | +3.1 |
| Aug | – | – | – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |