The prevailing climatic conditions, in particular the wind and tide patterns, are critical factors that affect surf forecast NZ. When predominating from a northern direction, waves will be more voluminous and provide ample opportunities for surfing enjoyment; however, if it is coming from an opposite direction with easterly winds then they may well be less expansive but still functional. The level of water also plays a role - as not only does it determine how high or low the wave crests can rise when compared to shoreline levels but additionally impacts its disability as there could potentially be more localized formations depending upon whether tide levels are higher or lower than normal!