Wind — 2026
| Month | Heemskerk | Velsen | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 20.6 km/h | 20.4 km/h | +0.2 |
| Apr | 16.5 km/h | 15.7 km/h | +0.8 |
| May | 15.8 km/h | 19.2 km/h | -3.4 |
| Jun | 17.8 km/h | 21.4 km/h | -3.6 |
| Jul | 17.4 km/h | 21.1 km/h | -3.7 |
| Aug |
| 16 km/h |
| 19.8 km/h |
| -3.8 |
| Sep | 18.6 km/h | 21 km/h | -2.4 |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |