This image shows only the swells directed at Sprecklesville that coincided with light winds or offshore conditions through a typical February and is based upon 1584 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours illustrate increasing wave sizes. Blue shows the smallest swells, less that 0.5m (1.5 feet) high. Green and yellow represent increasing swell sizes and red represents highest swells greater than >3m (>10ft). In each graph, the area of any colour is proportional to how commonly that size swell was forecast.
The diagram implies that the dominant swell direction, shown by the biggest spokes, was N, whereas the the dominant wind blows from the E. The chart at the bottom shows the same thing but without direction information. For example, swells larger than 1.5 feet (0.5m) coincided with good wind conditions 6% of the time, equivalent to 2 days. Open sea swells exceeding >3m (>10ft) are unlikely to occur in a normal February. Taking into account the ratio of these swells that coincided with predicted offshore winds, and given the fact that Sprecklesville is exposed to open water swells, we think that that clean surf can be found at Sprecklesville about 6% of the time and that surf is spoilt by onshore wind 33% of the time. This is means that we expect 11 days with waves in a typical February, of which 2 days should be surfable.
IMPORTANT: Beta version feature! Swell heights are open water values from NWW3. There is no attempt to model near-shore effects. Coastal wave heights will generally be less, especially if the break does not have unobstructed exposure to the open ocean.