https://www.ndbc.noaa.gov/show_plot.php?station=46244&meas=dmpd
NDBC - 5-day plot - Dominant Period at 46244
National Data Buoy Center - 5-day plot - Dominant Period at buoy 46244 (40.896N 124.358W) - Humboldt Bay, North Spit, CA (168).
ndbcdayplotdominantperiod