uk es it fr pt nl
15th Street ratings
Quality on a good day: 3.0
Consistency of Surf: 4.0
Difficulty Level: 1.0
Crowds: 2.0

Overall: 2.8

See all 18 ratings

Based on 1 vote. Vote


Surf Report Feed

15th Street Swell Statistics, September: Surf with Light or Offshore Winds

This image shows only the swells directed at 15th Street that coincided with light winds or offshore conditions through a typical September and is based upon 2880 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours show increasing wave sizes. The smallest swells, less than 0.5m (1.5 feet), high are coloured blue. Green and yellow illustrate increasing swell sizes and red illustrates biggest swells greater than >3m (>10ft). In either graph, the area of any colour is proportional to how often that size swell happens.

The diagram indicates that the dominant swell direction, shown by the biggest spokes, was SW, whereas the the prevailing wind blows from the W. 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 42% of the time, equivalent to 13 days. Open sea swells exceeding >3m (>10ft) are unlikely to arise in a normal September. Taking into account the fraction of these swells that coincided with forecast offshore winds, and given the fact that 15th Street is exposed to open water swells, we estimate that clean surf can be found at 15th Street about 42% of the time and that surf is spoilt by onshore wind 47% of the time. This is means that we expect 27 days with waves in a typical September, of which 13 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.