Forecasted swell spectra gives a bigger picture of how swell energy is concentrated and dispersed, with an interactive spectra graph for the next 16 days. Find swell spectra under Advanced Charts below the surf graph on mobile and at the bottom of every spot page under swell spectra on web.
Every wave in a swell breaks differently. Waves within one swell range in size and period, so when we say, “six foot at 13 seconds,” we mean that the average height of the largest third of waves is six foot, and the most energetic waves are around 13 seconds apart.
You might be used to reading the Surfline swell graphs to understand where wave energy is concentrated, but we all know from experience that two days (or even two hours) with six foot at 13 second swells can result in a different experience in the water.
Swell spectra shows you not just the averages (the peaks on the spectra graph), but where all the energy is distributed in a swell.

Intro: 0:00
Forecasted swell spectra: 0:23
Where to find it: 0:46
How to use it: 1:12

Learn more about this update here:
https://www.surfline.com/lp/whatsnew/...
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