Welcome to the Wave Period service provided by SurferToday.com and NOAA.
Check the Peak Wave Period and time between swells in the West Coast of USA for the next seven days:
What is Peak Wave Period Forecast? Learn the NOAA interpretation:
The peak period identifies either the period (the time between waves) associated with the locally generated wind sea (in cases with strong local winds) or the dominant wave system (swell) that is generated elsewhere. Note that this peak period field shows discontinuities. These discontinuities can loosely be interpreted as swell fronts, although in reality many swell systems overlap at most locations and times.