Wind — 2020
| Month | Heemskerk | Velsen | Difference |
|---|---|---|---|
| Jan | 23.9 km/h | 29.3 km/h | -5.4 |
| Feb | 32 km/h | 38.4 km/h | -6.4 |
| Mar | 23.6 km/h | 28.6 km/h | -5.0 |
| Apr | 16.7 km/h | 20 km/h | -3.3 |
| May | 17.1 km/h | 20.6 km/h | -3.5 |
| Jun | 16.8 km/h | 20.6 km/h | -3.8 |
| Jul | 17.5 km/h | 21.6 km/h | -4.1 |
| Aug | – | – | – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |