Wave periods in the north central Pacific at noon on February 6, 2003. The wave period is the time between wave peaks. The longer the period, the faster the waves are moving, because the energy of their motion has kept them relatively far apart. The vectors (red arrows) show which direction the waves are moving. In this example, the wave period near our buoy (at 37N and 160W) is 13.
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image with wind conditions

Y ou can access wave period images from the NOAA Wavewatch page at: http://polar.ncep.noaa.gov/waves/main_int.html .